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Showing 261 - 280 of 475 results

Vision-Based Detection of Bridge Damage Captured by Unmanned Aerial Vehicles

Stegagno, Paolo

;

Gindy, Mayrai

2025-09-01 | PDF

Bridge inspection is a vital component of any bridge management strategy of a state DOT. Significant funds are allocated to keeping the over 600,000 bridges in the U.S. safe. A routine bridge inspection is the most common type of inspection and is often performed from deck, ground or water levels or from permanent access structures, if available. V ...

01/27/2026

Title : Vision-Based Detection of Bridge Damage Captured by Unmanned Aerial Vehicles Creator(s) : Stegagno, Paolo;Gindy, Mayrai;Hendawi, Abdeltawab;Licht, Stephen; Corporate Creator(s) : University of Rhode Island. Department of Electrical, Computer and Biomedical Engineering;University of Maine. Transportation Infrastructure Durability Center (TIDC); Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2025-09-01 URL : https://rosap.ntl.bts.gov/view/dot/88730 Stegagno, Paolo et al. (2025). Vision-Based Detection of Bridge Damage Captured by Unmanned Aerial Vehicles. Stegagno, Paolo et al. "Vision-Based Detection of Bridge Damage Captured by Unmanned Aerial Vehicles" (2025) Stegagno, Paolo et al. "Vision-Based Detection of Bridge Damage Captured by Unmanned Aerial Vehicles" , 2025 Export RIS Citation Information. TY - Tech Report AU - Stegagno, Paolo AU - Gindy, Mayrai AU - Hendawi, Abdeltawab AU - Licht, Stephen A2 - University of Rhode Island. Department of Electrical, Computer and Biomedical Engineering A2 - University of Maine. Transportation Infrastructure Durability Center (TIDC) A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - Bridge inspection is a vital component of any bridge management strategy of a state DOT. Significant funds are allocated to keeping the over 600,000 bridges in the U.S. safe. A routine bridge inspection is the most common type of inspection and is often performed from deck, ground or water levels or from permanent access structures, if available. Visual inspection is the predominant approach used in a routine inspection. With visual inspection, only basic tools for cleaning, probing, sounding, measuring, and visual aids are used. However, according to research, there can be significant variation in the condition ratings assigned to a structure simply based on visual inspection [1]. The use of unmanned aerial vehicles (UAVs) has recently been explored for the use of bridge inspections [2]. UAVs equipped with high resolution or infrared cameras can be used to scan a bridge taking hundreds of images and essentially building a navigable 3D model of the bridge. Recent advances in machine learning may be employed to automatically identify different types of bridge damage [3]. This research project will evaluate the effectiveness of using more autonomous methods for the collection and analysis of bridge deck images for the purpose of identifying the type and extent of damage in concrete decks. AN - dot:88730 ET - Final Report: September 2022 – September 2025 KW - bridge inspection KW - deep learning KW - concrete damage KW - 3D modeling LA - English PB - University of Maine. Transportation Infrastructure Durability Center (TIDC) PY - 2025-09-01 TI - Vision-Based Detection of Bridge Damage Captured by Unmanned Aerial Vehicles M3 - Tech Report N1 - United States N1 - 69A3551847101 UR - https://rosap.ntl.bts.gov/view/dot/88730 ER -
Determining Layer Thickness and Understanding Moisture Related Damage of State-Owned Roads Using GPR and Capturing Such in a GIS-Based Inventory

Pariseault, Andrew ;

Franco, Pamela

2024-08-16 | PDF

The Rhode Island Department of Transportation (RIDOT) has a significant inventory of state-owned roads of which layer thickness and moisture related damage is uncertain. Discrete methods of assessment like coring and visual inspection provide limited data and are both time-consuming and costly in terms of traffic control and personnel. The objectiv ...

01/27/2026

Title : Determining Layer Thickness and Understanding Moisture Related Damage of State-Owned Roads Using GPR and Capturing Such in a GIS-Based Inventory Creator(s) : Pariseault, Andrew;Franco, Pamela;Martino, Nicole;Baxter, Christopher; Corporate Creator(s) : University of Rhode Island. Department of Civil and Environmental Engineering;University of Maine. Transportation Infrastructure Durability Center (TIDC); Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2024-08-16 URL : https://rosap.ntl.bts.gov/view/dot/88729 Pariseault, Andrew et al. (2024). Determining Layer Thickness and Understanding Moisture Related Damage of State-Owned Roads Using GPR and Capturing Such in a GIS-Based Inventory. Pariseault, Andrew et al. "Determining Layer Thickness and Understanding Moisture Related Damage of State-Owned Roads Using GPR and Capturing Such in a GIS-Based Inventory" (2024) Pariseault, Andrew et al. "Determining Layer Thickness and Understanding Moisture Related Damage of State-Owned Roads Using GPR and Capturing Such in a GIS-Based Inventory" , 2024 Export RIS Citation Information. TY - Tech Report AU - Pariseault, Andrew AU - Franco, Pamela AU - Martino, Nicole AU - Baxter, Christopher A2 - University of Rhode Island. Department of Civil and Environmental Engineering A2 - University of Maine. Transportation Infrastructure Durability Center (TIDC) A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - The Rhode Island Department of Transportation (RIDOT) has a significant inventory of state-owned roads of which layer thickness and moisture related damage is uncertain. Discrete methods of assessment like coring and visual inspection provide limited data and are both time-consuming and costly in terms of traffic control and personnel. The objective of this study is to evaluate the efficient use of Ground Penetrating Radar (GPR) at traffic speeds to determine layer thickness and moisture content of rural state-owned roads in Rhode Island. This will be accomplished through field studies of roads with both known and unknown compositions in close collaboration between University of Rhode Island (URI) and RIDOT researchers. The results will be incorporated into RIDOT’s GIS-based inventory of roads. The ultimate goal of this effort is to establish a system for collecting and viewing pavement layer thickness and moisture related damage on a network level and provide information that RIDOT can use to better plan, prioritize and properly allocate funding for pavement related projects. AN - dot:88729 ET - Final Report KW - Ground penetrating radar KW - Thickness KW - Moisture damage KW - Geographic information systems KW - Inventory KW - Roads KW - Rural highways KW - Discrete element method KW - Evaluation and assessment KW - Rural areas KW - State government agencies KW - Data analysis KW - layer thickness LA - English PB - University of Maine. Transportation Infrastructure Durability Center (TIDC) PY - 2024-08-16 TI - Determining Layer Thickness and Understanding Moisture Related Damage of State-Owned Roads Using GPR and Capturing Such in a GIS-Based Inventory M3 - Tech Report N1 - United States N1 - 69A3551847101 UR - https://rosap.ntl.bts.gov/view/dot/88729 ER -
Non-Contact Intelligent Inspection of Infrastructure

Tang, Jiong

;

Zhang, Yang

2024-07-01 | PDF

In this project, we develop non-contact sensing mechanism for health monitoring as well as the associated machine-learning based technique for decision making. Currently available sensory systems for structural health monitoring are almost all based on transducers that are directly attached to or embedded in structures monitored. As a result, they ...

01/27/2026

Title : Non-Contact Intelligent Inspection of Infrastructure Creator(s) : Tang, Jiong;Zhang, Yang;Wang, Ting; Corporate Creator(s) : University of Connecticut;University of Maine. Transportation Infrastructure Durability Center (TIDC); Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2024-07-01 URL : https://rosap.ntl.bts.gov/view/dot/88728 Tang, Jiong et al. (2024). Non-Contact Intelligent Inspection of Infrastructure. Tang, Jiong and Zhang, Yang and Wang, Ting "Non-Contact Intelligent Inspection of Infrastructure" (2024) Tang, Jiong et al. "Non-Contact Intelligent Inspection of Infrastructure" , 2024 Export RIS Citation Information. TY - Tech Report AU - Tang, Jiong AU - Zhang, Yang AU - Wang, Ting A2 - University of Connecticut A2 - University of Maine. Transportation Infrastructure Durability Center (TIDC) A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - In this project, we develop non-contact sensing mechanism for health monitoring as well as the associated machine-learning based technique for decision making. Currently available sensory systems for structural health monitoring are almost all based on transducers that are directly attached to or embedded in structures monitored. As a result, they face with critical barriers, such as extremely high implementation cost in very large-scale structures due to the large number of sensors needed and relatively high false alarm rate due to malfunction of sensors themselves. The non-contact nature of the proposed sensing modality will cause paradigm shift: it leads to mobile sensory system that can monitor very large-scale structures employing only a small number of sensors, and it allows us to increase considerably the confidence level of structural health monitoring. In this research, concurrent breakthroughs in sensor synthesis and data analysis are pursued. We (a) develop a new non-contact impedance-based sensing mechanism via two-way magneto-mechanical dynamic interaction that is enhanced by adaptive electrical circuitry integration, which facilitates the tunable high-frequency interrogation to disclose structural anomaly; and (b) formulate accurate and robust decision-making strategies that that take full advantage of the new machine learning techniques. AN - dot:88728 ET - Final Report KW - Structural deterioration and defects KW - Inspection KW - Infrastructure KW - Transducers KW - Sensors KW - Measurement KW - Analysis KW - Machine learning KW - Artificial intelligence KW - Decision making KW - Structural health monitoring KW - False alarms KW - Implementation KW - Transportation KW - Structural damage identification KW - non-contact transducer KW - magneto-mechanical coupling KW - impedance measurement KW - inverse analysis LA - English PB - University of Maine. Transportation Infrastructure Durability Center (TIDC) PY - 2024-07-01 TI - Non-Contact Intelligent Inspection of Infrastructure M3 - Tech Report N1 - United States N1 - 69A3551847101 UR - https://rosap.ntl.bts.gov/view/dot/88728 ER -
Exploring the Safety Impact of Rumble Strips on Prevention of Lane Departure Crashes in Maine

Shirazi, Mohammadali

;

Garder, Per

2024-04-01 | PDF

Among all traffic collisions, lane departure crashes are the leading type of serious traffic crashes in Maine, comprising 73% of statewide traffic fatalities. To reduce these crashes, the Maine Department of Transportation (MaineDOT) installed shoulder and centerline rumble strips on roadways to prevent lane departure crashes. Specifically, 511 mil ...

01/27/2026

Title : Exploring the Safety Impact of Rumble Strips on Prevention of Lane Departure Crashes in Maine Creator(s) : Shirazi, Mohammadali;Garder, Per;Gil-Marin, Jhan;Sawtelle, Alainie; Corporate Creator(s) : University of Maine. Transportation Infrastructure Durability Center (TIDC) Corporate Contributor(s) : Maine. Department of Transportation;United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2024-04-01 URL : https://rosap.ntl.bts.gov/view/dot/88727 Shirazi, Mohammadali et al. (2024). Exploring the Safety Impact of Rumble Strips on Prevention of Lane Departure Crashes in Maine. Shirazi, Mohammadali et al. "Exploring the Safety Impact of Rumble Strips on Prevention of Lane Departure Crashes in Maine" (2024) Shirazi, Mohammadali et al. "Exploring the Safety Impact of Rumble Strips on Prevention of Lane Departure Crashes in Maine" , 2024 Export RIS Citation Information. TY - Tech Report AU - Shirazi, Mohammadali AU - Garder, Per AU - Gil-Marin, Jhan AU - Sawtelle, Alainie A2 - University of Maine. Transportation Infrastructure Durability Center (TIDC) A3 - Maine. Department of Transportation A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - Among all traffic collisions, lane departure crashes are the leading type of serious traffic crashes in Maine, comprising 73% of statewide traffic fatalities. To reduce these crashes, the Maine Department of Transportation (MaineDOT) installed shoulder and centerline rumble strips on roadways to prevent lane departure crashes. Specifically, 511 miles of centerline rumble strips were installed on undivided bidirectional rural two-lane roadways to prevent head-on collisions. Given the severity of head-on collisions, coupled with significant investment in rumble strip installation, there is a need to understand the impact of rumble strips in reducing lane departure crashes. This study uses observational before-and-after studies with two methods: comparison group, and empirical Bayes (EB) comparison group to explore the effectiveness of centerline rumble strips in reducing head-on and opposite sideswipe crashes for rural two-lane roadways and compute crash modification factors (CMFs) in Maine. The evaluation investigated the impact of centerline rumble strips on reducing the total as well as fatal and injury head-on and sideswipe collisions on rural two-lane roadways. The economic benefits of using rumble strips are also explored by using a benefit-cost analysis. Results: This study finds that the installations of centerline rumble strips are associated with reductions of 28%-48% of head-on and opposite sideswipe collisions on rural two-lane roads. In addition, the benefits of the rumble strips installations are at least 14 times the cost. the centerline rumble strips are cost-effective countermeasures to reduce head-on collisions on rural two-lane roadways in Maine. This study provides a quantification of the safety effectiveness, and economic benefits of the centerline rumble strips, as one of key road safety countermeasures to prevent head-on collisions, installed on rural two-lane roadways in Maine. AN - dot:88727 ET - Final Report KW - Rural highways KW - Two lane highways KW - Center lines KW - Rumble strips KW - Empirical methods KW - Bayes' theorem KW - Crash modification factors KW - Exploration KW - Highway safety KW - Traffic crashes KW - Lane lines KW - Benefit cost analysis KW - Countermeasures LA - English PB - University of Maine. Transportation Infrastructure Durability Center (TIDC) PY - 2024-04-01 TI - Exploring the Safety Impact of Rumble Strips on Prevention of Lane Departure Crashes in Maine M3 - Tech Report N1 - United States N1 - 69A3551847101 UR - https://rosap.ntl.bts.gov/view/dot/88727 ER -
AIA Recommendations for Ultrasound Inspection of New- Make Turbine Engine, Life-Limited Rotating Parts

Aerospace Industries Association of America ...

2026-01-01 | PDF

The aero gas turbine industry has collaborated with the Federal Aviation Administration (FAA) to study and provide guidance regarding the inspection process for the subsurface volume of critical nickel-based engine hardware, through the Aerospace Industries Association (AIA) team AIA A-18-003. Data from across a broad spectrum in the industry is ne ...

01/27/2026

Title : AIA Recommendations for Ultrasound Inspection of New- Make Turbine Engine, Life-Limited Rotating Parts Corporate Creator(s) : Aerospace Industries Association of America;Aerospace Industries Association Civil Aviation Regulatory & Safety (CARS) Committee; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Policy and Standards Division Published Date : 2026-01-01 Report Number : DOT/FAA/TC-26/5 DOI : https://doi.org/10.21949/68yk-4c52 Aerospace Industries Association of America (2026). AIA Recommendations for Ultrasound Inspection of New- Make Turbine Engine, Life-Limited Rotating Parts. https://doi.org/10.21949/68yk-4c52 Aerospace Industries Association of America "AIA Recommendations for Ultrasound Inspection of New- Make Turbine Engine, Life-Limited Rotating Parts" (2026), https://doi.org/10.21949/68yk-4c52 Aerospace Industries Association of America "AIA Recommendations for Ultrasound Inspection of New- Make Turbine Engine, Life-Limited Rotating Parts" , 2026, https://doi.org/10.21949/68yk-4c52 Export RIS Citation Information. TY - Tech Report A2 - Aerospace Industries Association of America A2 - Aerospace Industries Association Civil Aviation Regulatory & Safety (CARS) Committee A3 - United States. Department of Transportation. Federal Aviation Administration. Policy and Standards Division A4 - Stillinger, Jeffrey AB - The aero gas turbine industry has collaborated with the Federal Aviation Administration (FAA) to study and provide guidance regarding the inspection process for the subsurface volume of critical nickel-based engine hardware, through the Aerospace Industries Association (AIA) team AIA A-18-003. Data from across a broad spectrum in the industry is needed for this work since the probability of an uncontained rotor event from any cause has proven to be extremely low. Following an uncontained event from a melt anomaly in a nickel high pressure turbine (HPT) disk in 2016, industry teams including this team AIA A-18-003, team AIA A-18-004, the AIA Jet Engine Nickel Quality Committee (JENQC), and the AIA Rotor Integrity Steering Committee (RISC) have collected data and considered ways to improve rotor damage tolerance through improvements in inspection technologies, melting and manufacturing practices, and part design and lifing. This report documents the findings from the evaluation of Ultrasonic (UT) forging inspections. The inspection guidance and recommendations provided here are integral components of a broader damage tolerance strategy for critical parts. A comprehensive damage tolerance strategy includes part manufacturing, service management, and engineering design characteristics to effectively minimize potential threats. AN - dot:88726 DO - https://doi.org/10.21949/68yk-4c52 ET - Final Report KW - Ultrasonic tests KW - Engineering tolerances KW - Mechanical failure KW - Turbine engines KW - Nickel alloys KW - Forging LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2026-01-01 SN - DOT/FAA/TC-26/5 TI - AIA Recommendations for Ultrasound Inspection of New- Make Turbine Engine, Life-Limited Rotating Parts M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/88726 ER -
In-Service Ultrasonic Inspections for Turbine Engine, Life-Limited Rotating Parts

Aerospace Industries Association of America ...

2026-01-01 | PDF

The aero gas turbine industry has collaborated with the Federal Aviation Administration (FAA) to study and provide guidance and make recommendations about the implementation of requirements for in-service, sub-surface inspections through the Aerospace Industries Association (AIA) team AIA A-18-004. Data from across a broad spectrum in the industry ...

01/27/2026

Title : In-Service Ultrasonic Inspections for Turbine Engine, Life-Limited Rotating Parts Corporate Creator(s) : Aerospace Industries Association of America;Aerospace Industries Association Civil Aviation Regulatory & Safety (CARS) Committee; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Policy and Standards Division Published Date : 2026-01-01 Report Number : DOT/FAA/TC-26/4 DOI : https://doi.org/10.21949/xzac-av82 Aerospace Industries Association of America (2026). In-Service Ultrasonic Inspections for Turbine Engine, Life-Limited Rotating Parts. https://doi.org/10.21949/xzac-av82 Aerospace Industries Association of America "In-Service Ultrasonic Inspections for Turbine Engine, Life-Limited Rotating Parts" (2026), https://doi.org/10.21949/xzac-av82 Aerospace Industries Association of America "In-Service Ultrasonic Inspections for Turbine Engine, Life-Limited Rotating Parts" , 2026, https://doi.org/10.21949/xzac-av82 Export RIS Citation Information. TY - Tech Report A2 - Aerospace Industries Association of America A2 - Aerospace Industries Association Civil Aviation Regulatory & Safety (CARS) Committee A3 - United States. Department of Transportation. Federal Aviation Administration. Policy and Standards Division AB - The aero gas turbine industry has collaborated with the Federal Aviation Administration (FAA) to study and provide guidance and make recommendations about the implementation of requirements for in-service, sub-surface inspections through the Aerospace Industries Association (AIA) team AIA A-18-004. Data from across a broad spectrum in the industry is needed for this work since the probability of an uncontained rotor event from any cause has proven to be extremely low. Following an uncontained event from a melt anomaly in a nickel high pressure turbine (HPT) disk in 2016, industry teams including this team, team AIA A-18-003, the AIA Jet Engine Nickel Consortium (JENQC), and the AIA Rotor Integrity Steering Committee (RISC) have collected data and considered ways to improve rotor damage tolerance through improvements in inspection technologies, melting and manufacturing practices, and part design and lifing. This report documents the data collected and the findings from the evaluation of in-service inspections. The inspection guidance and recommendations provided here are considered as part of a larger critical part damage tolerance strategy. A comprehensive damage tolerance strategy considers the part manufacture, service management, and engineering design characteristics in order to minimize threats. AN - dot:88725 DO - https://doi.org/10.21949/xzac-av82 ET - Final Report KW - Ultrasonic tests KW - Engineering tolerances KW - Mechanical failure KW - Turbine engines KW - Nickel alloys KW - Inspection KW - Life-limited rotating part KW - Uncontained KW - engine failure KW - Melt anomaly LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2026-01-01 SN - DOT/FAA/TC-26/4 TI - In-Service Ultrasonic Inspections for Turbine Engine, Life-Limited Rotating Parts M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/88725 ER -
Variability of Hamburg Wheel Tracking Devices

Chowdhury, Arif ;

Button, Joe W.

2004-04-01 | PDF

The objective of this implementation project was to prepare procurement specifications and purchase three Hamburg Wheel-Track Devices (HWTDs), install them in two different Texas Department of Transportation (TxDOT) laboratories, and provide training to assist the technicians in proper procedures for testing and data analysis. The implementation pr ...

01/27/2026

Title : Variability of Hamburg Wheel Tracking Devices Creator(s) : Chowdhury, Arif;Button, Joe W.;Wikander, John P.; Corporate Creator(s) : Texas A&M University System. Texas Transportation Institute Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2004-04-01 Report Number : FHWA/TX-04/5-4977-01-1 URL : https://rosap.ntl.bts.gov/view/dot/88724 Chowdhury, Arif et al. (2004). Variability of Hamburg Wheel Tracking Devices. Chowdhury, Arif and Button, Joe W. and Wikander, John P. "Variability of Hamburg Wheel Tracking Devices" (2004) Chowdhury, Arif et al. "Variability of Hamburg Wheel Tracking Devices" , 2004 Export RIS Citation Information. TY - Tech Report AU - Chowdhury, Arif AU - Button, Joe W. AU - Wikander, John P. A2 - Texas A&M University System. Texas Transportation Institute A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - The objective of this implementation project was to prepare procurement specifications and purchase three Hamburg Wheel-Track Devices (HWTDs), install them in two different Texas Department of Transportation (TxDOT) laboratories, and provide training to assist the technicians in proper procedures for testing and data analysis. The implementation process included conducting a limited proficiency study of all five of the HWTDs belonging to TxDOT as well as two HWTDs belonging to the Texas Transportation Institute and PaveTex. The proficiency study determined the accuracy and precision of the seven HWTDs. A statistical analysis of the results revealed no significant differences among the seven HWTDs. However, the ability of the statistical models to detect differences between the machines was restricted because of the low number of replications of the experiment. Observations indicate that it may be possible to improve the current TxDOT HWTD data collection technique to improve statistical validity of the measurements. AN - dot:88724 ET - Implementation: November 2002-February 2004 KW - Accuracy KW - Data collection KW - Depth KW - Improvements KW - Measurement KW - Pavement ruts KW - Precision KW - Procurement KW - Specifications KW - Statistical analysis KW - Testing equipment KW - Validity LA - English PB - Texas. Department of Transportation PY - 2004-04-01 SN - FHWA/TX-04/5-4977-01-1 TI - Variability of Hamburg Wheel Tracking Devices M3 - Tech Report N1 - United States N1 - 5-4977-01 UR - https://rosap.ntl.bts.gov/view/dot/88724 ER -
Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Risk-Based Asset Ranking and Corridor Prioritization

Yang, David Y.

;

Khosravifar, Arash

2025-11-10 | PDF

This report presents the results of Phase II of the project, "Framework and Methodology for Risk-based Bridge and Tunnel Asset Management". The research was carried out at Portland State University in collaboration with engineers and officials at the Oregon Department of Transportation (ODOT) and Federal Highway Administration (FHWA). Using the fra ...

01/27/2026

Title : Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Risk-Based Asset Ranking and Corridor Prioritization Creator(s) : Yang, David Y.;Khosravifar, Arash;Moug, Diane;Unnikrishnan, Avinash; Corporate Creator(s) : Portland State University. Department of Civil & Environmental Engineering;University of Alabama at Birmingham; Corporate Contributor(s) : United States. Federal Highway Administration. Office of Bridges and Structures Published Date : 2025-11-10 URL : https://rosap.ntl.bts.gov/view/dot/88723 Yang, David Y. et al. (2025). Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Risk-Based Asset Ranking and Corridor Prioritization. Yang, David Y. et al. "Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Risk-Based Asset Ranking and Corridor Prioritization" (2025) Yang, David Y. et al. "Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Risk-Based Asset Ranking and Corridor Prioritization" , 2025 Export RIS Citation Information. TY - Tech Report AU - Yang, David Y. AU - Khosravifar, Arash AU - Moug, Diane AU - Unnikrishnan, Avinash A2 - Portland State University. Department of Civil & Environmental Engineering A2 - University of Alabama at Birmingham A3 - United States. Federal Highway Administration. Office of Bridges and Structures AB - This report presents the results of Phase II of the project, "Framework and Methodology for Risk-based Bridge and Tunnel Asset Management". The research was carried out at Portland State University in collaboration with engineers and officials at the Oregon Department of Transportation (ODOT) and Federal Highway Administration (FHWA). Using the framework and methodology developed in Phase I of the project, the primary goal of Phase II is to showcase the practical application in risk-based asset management. In particular, the report includes the following two case studies: Case Study I — Weighted hazard scenarios for seismic risk assessment of Oregon Highway Bridges, and Case Study II — Accessibility risk assessment and corridor prioritization for Portland bridge network under a scenario Cascadia Subduction Zone (CSZ) earthquake. Each case study focuses on a specific method proposed in the Phase I of the project. AN - dot:88723 ET - Final Report August 2024 - November 2025 KW - Risk assessment KW - Safety analysis KW - Performance based specifications KW - Asset management KW - Bridge management systems KW - State departments of transportation KW - Strategic planning KW - Tunnels KW - Performance risk of transportation networks LA - English PB - Portland State University. Department of Civil & Environmental Engineering PY - 2025-11-10 TI - Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Risk-Based Asset Ranking and Corridor Prioritization M3 - Tech Report N1 - United States N1 - 693JJ321C000030 UR - https://rosap.ntl.bts.gov/view/dot/88723 ER -
Structural Integrity, Safety, and Durability of Critical Members and Connections of Old Railroad Bridges Under Dynamic Service Loads and Conditions

de Oliveira, Celso

;

Anand, Rahul

2024-10-31 | PDF

Many railway bridges in New England were designed and constructed over a century ago, using now-outdated design codes and materials, making them susceptible to damage under modern service loads. These aging structures and their critical members such as eye-bars, pins, and gusset plates, are showing signs of deterioration, including corrosion, fatig ...

01/27/2026

Title : Structural Integrity, Safety, and Durability of Critical Members and Connections of Old Railroad Bridges Under Dynamic Service Loads and Conditions Creator(s) : de Oliveira, Celso;Anand, Rahul;Tripathi, Sachin;Malla, Ramesh B.; Corporate Creator(s) : University of Connecticut. Department of Civil and Environmental Engineering;University of Maine. Transportation Infrastructure Durability Center (TIDC); Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2024-10-31 URL : https://rosap.ntl.bts.gov/view/dot/88722 de Oliveira, Celso et al. (2024). Structural Integrity, Safety, and Durability of Critical Members and Connections of Old Railroad Bridges Under Dynamic Service Loads and Conditions. de Oliveira, Celso et al. "Structural Integrity, Safety, and Durability of Critical Members and Connections of Old Railroad Bridges Under Dynamic Service Loads and Conditions" (2024) de Oliveira, Celso et al. "Structural Integrity, Safety, and Durability of Critical Members and Connections of Old Railroad Bridges Under Dynamic Service Loads and Conditions" , 2024 Export RIS Citation Information. TY - Tech Report AU - de Oliveira, Celso AU - Anand, Rahul AU - Tripathi, Sachin AU - Malla, Ramesh B. A2 - University of Connecticut. Department of Civil and Environmental Engineering A2 - University of Maine. Transportation Infrastructure Durability Center (TIDC) A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - Many railway bridges in New England were designed and constructed over a century ago, using now-outdated design codes and materials, making them susceptible to damage under modern service loads. These aging structures and their critical members such as eye-bars, pins, and gusset plates, are showing signs of deterioration, including corrosion, fatigue, and cross-sectional loss. This research aims to investigate the structural behavior of these critical components in old truss-type steel railroad bridges under dynamic loads and performance conditions, with a specific focus on the Devon Bridge and Cos Cob Bridge. The study also seeks to develop methodologies that can be applied to similar aging bridges throughout the region. The research incorporates field testing, finite element (FE) modeling, and sensitivity analysis to evaluate the structural integrity of critical bridge components. Starting with a critical review of past issues and failures, the study authors worked closely with New England’s Departments of Transportation (DOTs) and railroad companies to collect reliable data on bridge types and connection problems. Field tests were conducted on the Devon and Cos Cob bridges, using Laser Doppler Vibrometers (LDV) and accelerometers to measure vertical displacements and natural frequencies during train traversals. These data were then used to calibrate FE simulations, which replicate various operational scenarios such as cross-sectional loss and increased dynamic loads. Sensitivity analysis was employed to further refine the models, emphasizing dynamic behavior, impact, and material aging. The results show a strong correlation between the field data and FE simulations, validating the models for structural health assessment. Critical members and connections were identified as being at high risk of failure due to significant deterioration. Recommendations are provided for targeted maintenance and rehabilitation strategies to extend the lifespan of these vital transportation assets. This research contributes to the ongoing preservation of aging infrastructure by providing a robust, scalable methodology for pinpointing, evaluating, and mitigating damage in steel truss bridges. By combining analytical, computational, and experimental techniques, this research offers a comprehensive strategy for understanding and addressing the challenges faced in maintaining aging railroad bridges. The findings are particularly relevant for structures like the Devon and Cos Cob bridges, but the approach is adaptable for broader application across other aging bridges in the region. AN - dot:88722 ET - Final Report KW - Aging (Materials) KW - Deterioration KW - Railroad bridges KW - Finite element method KW - Dynamic loads KW - Vertical supports KW - Sensitivity analysis KW - Laser doppler velocimeters KW - Vibrometers KW - Accelerometers KW - Truss bridges KW - Methodology KW - Infrastructure KW - Evaluation KW - Construction KW - Aging Railroad Bridges KW - Vertical Displacement KW - Natural Frequencies KW - Interaction Ratio LA - English PB - University of Maine. Transportation Infrastructure Durability Center (TIDC) PY - 2024-10-31 TI - Structural Integrity, Safety, and Durability of Critical Members and Connections of Old Railroad Bridges Under Dynamic Service Loads and Conditions M3 - Tech Report N1 - United States N1 - 69A3551847101 UR - https://rosap.ntl.bts.gov/view/dot/88722 ER -
Capacity Prediction of Repaired and Unrepaired Bridge Beams with Deteriorated Ends

Attanayake, Upul ;

Bhowmik, Sanjoy

2025-09-30 | PDF

The Michigan Department of Transportation (MDOT) identified significant deterioration at the ends of steel and prestressed concrete (PSC) beams, requiring systematic evaluation and improved decision-making protocols for Requests for Action (RFAs). This comprehensive study examined 431 steel beam ends and 267 PSC bridges to develop capacity-based as ...

01/27/2026

Title : Capacity Prediction of Repaired and Unrepaired Bridge Beams with Deteriorated Ends Creator(s) : Attanayake, Upul;Bhowmik, Sanjoy;Saleh, Kevin;Hu, Yufeng;Berke, Neal; Corporate Creator(s) : Western Michigan University. College of Engineering and Applied Sciences Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration;Michigan. Dept. of Transportation. Research Administration; Published Date : 2025-09-30 Report Number : SPR-1745 URL : https://rosap.ntl.bts.gov/view/dot/88721 Attanayake, Upul et al. (2025). Capacity Prediction of Repaired and Unrepaired Bridge Beams with Deteriorated Ends. Attanayake, Upul et al. "Capacity Prediction of Repaired and Unrepaired Bridge Beams with Deteriorated Ends" (2025) Attanayake, Upul et al. "Capacity Prediction of Repaired and Unrepaired Bridge Beams with Deteriorated Ends" , 2025 Export RIS Citation Information. TY - Tech Report AU - Attanayake, Upul AU - Bhowmik, Sanjoy AU - Saleh, Kevin AU - Hu, Yufeng AU - Berke, Neal A2 - Western Michigan University. College of Engineering and Applied Sciences A3 - United States. Department of Transportation. Federal Highway Administration A3 - Michigan. Dept. of Transportation. Research Administration AB - The Michigan Department of Transportation (MDOT) identified significant deterioration at the ends of steel and prestressed concrete (PSC) beams, requiring systematic evaluation and improved decision-making protocols for Requests for Action (RFAs). This comprehensive study examined 431 steel beam ends and 267 PSC bridges to develop capacity-based assessment methods and repair guidelines. For steel beam ends, the analysis revealed a strong preference for bolted repairs over welded repairs due to field welding challenges and concerns about fatigue. Section loss limits of 20% for webs and 10% for flanges were established as RFA thresholds. Finite element analysis of W30×108 beams with corrosion-induced holes resulted in capacity reduction factors ranging from 0.39 to 0.74, depending on hole geometry and the presence of stiffeners. Fatigue analysis revealed a significant reduction in fatigue life due to bolt holes with high surface roughness and pre-existing cracks. For PSC beam ends, a Strut-and-Tie Method was implemented to model complex load transfer mechanisms, establishing 15% capacity reduction as the critical RFA threshold. Specific deterioration limits showed that spalls with ≥15% strand exposure or ≥40% section loss without strand exposure warrant immediate action. Accelerated corrosion testing of repair methods identified that combining latex-modified concrete patches with zinc-rich epoxy primer and elastomeric surface coatings provided optimal performance. Field evaluations demonstrated superior long-term durability of reinforced overcasts with FRP U-wraps and protective coatings when compared to unreinforced patches. Updated inspection guidelines, calculation tools, and comprehensive repair selection criteria were developed to enhance bridge safety while optimizing maintenance resource allocation through rational correlations between visual inspection data and structural performance. AN - dot:88721 ET - Final Report: 10/01/2022 – 09/30/2025 KW - Beams KW - Concrete KW - Deterioration KW - Mechanical fatigue KW - Prestressed concrete KW - Load factor KW - Steel KW - Mathematical prediction KW - Bridge management systems KW - Guidelines KW - Repairing KW - Decision making KW - Beam ends LA - English PB - Michigan Department of Transportation. Research Administration PY - 2025-09-30 SN - SPR-1745 TI - Capacity Prediction of Repaired and Unrepaired Bridge Beams with Deteriorated Ends M3 - Tech Report N1 - United States N1 - 2022-0434 Z1 UR - https://rosap.ntl.bts.gov/view/dot/88721 ER -
Inspection and Maintenance Guidelines for Mechanically Stabilized Earth Walls

Barry, Michelle L.

;

Coffman, Richard A.

2024-12-01 | PDF

This report outlines the results of a comprehensive study focused on enhancing maintenance and inspection practices for mechanically stabilized earth (MSE) walls. The project was sponsored by the Arkansas Department of Transportation (ARDOT), and its central objectives were to formulate the best management practices for MSE wall maintenance and dev ...

01/27/2026

Title : Inspection and Maintenance Guidelines for Mechanically Stabilized Earth Walls Creator(s) : Barry, Michelle L.;Coffman, Richard A.; Corporate Creator(s) : University of Arkansas, Fayetteville. Department of Civil Engineering Corporate Contributor(s) : Arkansas. Department of Transportation. Transportation Research Committee Published Date : 2024-12-01 URL : https://rosap.ntl.bts.gov/view/dot/88720 Barry, Michelle L. and Coffman, Richard A. (2024). Inspection and Maintenance Guidelines for Mechanically Stabilized Earth Walls. Barry, Michelle L. and Coffman, Richard A. "Inspection and Maintenance Guidelines for Mechanically Stabilized Earth Walls" (2024) Barry, Michelle L. and Coffman, Richard A. "Inspection and Maintenance Guidelines for Mechanically Stabilized Earth Walls" , 2024 Export RIS Citation Information. TY - Tech Report AU - Barry, Michelle L. AU - Coffman, Richard A. A2 - University of Arkansas, Fayetteville. Department of Civil Engineering A3 - Arkansas. Department of Transportation. Transportation Research Committee AB - This report outlines the results of a comprehensive study focused on enhancing maintenance and inspection practices for mechanically stabilized earth (MSE) walls. The project was sponsored by the Arkansas Department of Transportation (ARDOT), and its central objectives were to formulate the best management practices for MSE wall maintenance and develop a comprehensive inspector’s guidebook. To address a gap in the existing literature, the research focused on creating a manual that provides inspection procedures, maintenance guidance, and repair strategies to mitigate distress signs such as panel movement, cracking, and backfill material loss. The methodology encompassed a thorough review of documented MSE wall issues, a nationwide survey yielding insights from 44 state Departments of Transportation, consultations with MSE wall manufacturers, and hands-on site inspections in Arkansas. These efforts were instrumental in creating a geographic information system database cataloging ARDOT's MSE walls, informed by both the survey findings and expert consultation. The resultant maintenance inspector’s guidebook presents a step-by-step inspection framework, grading for distress severity, and tailored repair recommendations. This guidebook was piloted with assistance from ARDOT and was updated as needed to ensure smooth implementation into current maintenance practices within the agency. The project’s multi-faceted approach ultimately seeks to enhance the longevity and reliability of the MSE wall infrastructure and serve as a pivotal resource for maintenance personnel. AN - dot:88720 ET - Final Report KW - Mechanically stabilized earth KW - Inspection KW - Maintenance KW - Guidelines KW - Literature reviews LA - English PB - Arkansas. Department of Transportation. Transportation Research Committee PY - 2024-12-01 TI - Inspection and Maintenance Guidelines for Mechanically Stabilized Earth Walls M3 - Tech Report N1 - United States N1 - TRC2104 UR - https://rosap.ntl.bts.gov/view/dot/88720 ER -
An Analysis of VDOT’s Sight Distance Requirements Relative to Context-Sensitive Designs

Lamsal, Sharad ;

McKinney, Jonathan

2026-01-01 | PDF

Intersection sight distance (ISD) requirements are intended to enhance safety by ensuring visibility at intersections. However, in dense urban areas, these requirements can preclude elements of the urban streetscape, such as street trees, on-street parking, and transit infrastructure, and can restrict compact mixed-use developments, such as traditi ...

01/27/2026

Title : An Analysis of VDOT’s Sight Distance Requirements Relative to Context-Sensitive Designs Creator(s) : Lamsal, Sharad;McKinney, Jonathan;Dougald, Lance E.;Chen, Tong Donna; Corporate Creator(s) : Virginia Transportation Research Council (VTRC);University of Virginia; Corporate Contributor(s) : Virginia. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-01-01 Report Number : VTRC 26-R27 URL : https://rosap.ntl.bts.gov/view/dot/88719 Lamsal, Sharad et al. (2026). An Analysis of VDOT’s Sight Distance Requirements Relative to Context-Sensitive Designs. Lamsal, Sharad et al. "An Analysis of VDOT’s Sight Distance Requirements Relative to Context-Sensitive Designs" (2026) Lamsal, Sharad et al. "An Analysis of VDOT’s Sight Distance Requirements Relative to Context-Sensitive Designs" , 2026 Export RIS Citation Information. TY - Tech Report AU - Lamsal, Sharad AU - McKinney, Jonathan AU - Dougald, Lance E. AU - Chen, Tong Donna A2 - Virginia Transportation Research Council (VTRC) A2 - University of Virginia A3 - Virginia. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Intersection sight distance (ISD) requirements are intended to enhance safety by ensuring visibility at intersections. However, in dense urban areas, these requirements can preclude elements of the urban streetscape, such as street trees, on-street parking, and transit infrastructure, and can restrict compact mixed-use developments, such as traditional neighborhood developments. Although literature on the safety impacts of ISD is plentiful, little of it is tailored to low-speed urban environments, an area of interest to the Virginia Department of Transportation (VDOT). Accordingly, this study examined the existing state of practice on ISD guidelines and conducted a safety analysis focused on low-speed urban intersections. This report first reviews literature and policies across state departments of transportation (DOTs) and localities. Second, it presents findings from a survey of 17 state DOTs, 34 Virginia localities, and 24 VDOT residencies on current practices related to implementing ISD standards. Then, it provides details of a safety analysis examining how ISD impacts crash occurrence for 359 intersections in Virginia, distinguishing between T-intersections and four-leg intersections and stratifying by speed ranges (low speed ≤ 25 mph and high speed ≥ 30 mph). AN - dot:88719 ET - Final Report KW - Intersections KW - Sight distance KW - Highway safety KW - Urban areas KW - Best practices KW - Context sensitive design KW - Visibility KW - Crash modification factors LA - English PB - Virginia Transportation Research Council (VTRC) PY - 2026-01-01 SN - VTRC 26-R27 TI - An Analysis of VDOT’s Sight Distance Requirements Relative to Context-Sensitive Designs M3 - Tech Report N1 - United States N1 - 124252 UR - https://rosap.ntl.bts.gov/view/dot/88719 ER -
Slope Restoration on Urban Freeways

Cregg, Bert M.

2025-09-30 | PDF

Improving the diversity of roadside plantings can provide an array of benefits including improved aesthetics, improved driver safety, and increased biodiversity. However, establishing landscape plants along roadsides can often be difficult due to a variety of soil related and other environmental factors. In an earlier trial, researchers from Michig ...

01/27/2026

Title : Slope Restoration on Urban Freeways Creator(s) : Cregg, Bert M. Corporate Creator(s) : Michigan State University. Department of Horticulture Corporate Contributor(s) : Michigan Department of Transportation (MDOT);United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-09-30 Report Number : SPR-1767 URL : https://rosap.ntl.bts.gov/view/dot/88718 Cregg, Bert M. (2025). Slope Restoration on Urban Freeways. Cregg, Bert M. "Slope Restoration on Urban Freeways" (2025) Cregg, Bert M. "Slope Restoration on Urban Freeways" , 2025 Export RIS Citation Information. TY - Tech Report AU - Cregg, Bert M. A2 - Michigan State University. Department of Horticulture A3 - Michigan Department of Transportation (MDOT) A3 - United States. Department of Transportation. Federal Highway Administration AB - Improving the diversity of roadside plantings can provide an array of benefits including improved aesthetics, improved driver safety, and increased biodiversity. However, establishing landscape plants along roadsides can often be difficult due to a variety of soil related and other environmental factors. In an earlier trial, researchers from Michigan State University conducted a large-scale field planting along Interstate 696 in the Detroit metro area in order to identify site preparation practices and identify plant materials that were suited for roadside conditions. From the initial phase of this project MSU researchers determined that compost addition was important to aid in the establishment of landscape plants both from the perspective of improved survival as well as improved plant growth. MSU personnel also identified plant species that were well suited for highway plantings based on initial survival and growth. Here we report the continuation of this project focusing on characterizing the highway roadside environment and examining long-term (years 3-6) responses of the plant materials based on their cover and survival. We found that shrubs generally performed better along the roadside environment than herbaceous perennials or grasses. Shrubs that survived well and provided excellent cover included Diervilla, Physocarpus, contoneaster, and Cornus. Herbaceous perennials that provided excellent cover were Amsonia and hemerocallis. An examination of weather data from weather stations established along the Interstate roadside indicated that air temperatures were 3 to 4°F higher along the roadside compared to regional temperatures. There was little difference in ambient temperatures between north-facing and south-facing slopes along the freeway. A major challenge in maintaining plants along the highway roadside was weed control. AN - dot:88718 ET - Final Report: 4/1/2017 – 12/31/2025 KW - Compost KW - Mulching KW - Till KW - Shrubs KW - Grasses KW - Plants KW - Drivers KW - Highway safety KW - Urban areas KW - Freeways KW - Biodiversity KW - Interstate highways KW - Site preparation KW - herbaceous perennials LA - English PB - Michigan Department of Transportation. Research Administration PY - 2025-09-30 SN - SPR-1767 TI - Slope Restoration on Urban Freeways M3 - Tech Report N1 - United States N1 - 2013-0066 Z10 UR - https://rosap.ntl.bts.gov/view/dot/88718 ER -
HY-8 Culvert Hydraulic Analysis Program Version 8.0.1.2 [supporting software]

United States. Federal Highway Administration. Office of Bridges and Structures

2025-03-05 | ZIP

HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software.Improv ...

01/27/2026

Title : HY-8 Culvert Hydraulic Analysis Program Version 8.0.1.2 [supporting software] Corporate Creator(s) : United States. Federal Highway Administration. Office of Bridges and Structures Contributor(s) : Lizewski, Ryan Published Date : 2025-03-05 URL : https://rosap.ntl.bts.gov/view/dot/88717 United States. Federal Highway Administration. Office of Bridges and Structures (2025). HY-8 Culvert Hydraulic Analysis Program Version 8.0.1.2 [supporting software]. United States. Federal Highway Administration. Office of Bridges and Structures "HY-8 Culvert Hydraulic Analysis Program Version 8.0.1.2 [supporting software]" (2025) United States. Federal Highway Administration. Office of Bridges and Structures "HY-8 Culvert Hydraulic Analysis Program Version 8.0.1.2 [supporting software]" , 2025 Export RIS Citation Information. TY - Software A2 - United States. Federal Highway Administration. Office of Bridges and Structures A4 - Lizewski, Ryan AB - HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software. AB - Improvements made to this version of the software include the following: User-defined culverts are normalized by the invert in front-view plots (calculations did not need to be updated). Water Surface Profile Data for culverts with decreasing station computed correctly. Fixed headwater line length in high headwater plots. Fixed an error related to first roadway station that caused overtopping calculations to fail. AB - By downloading the software, users acknowledge that they have read and agree to the following conditions: The application of this software is the responsibility of the user. It is imperative that the responsible designer understands the potential accuracy limitations of the program results, independently cross checks those results with other methods, and examines the reasonableness of the results with engineering knowledge and experience. There are no expressed or implied warranties. I agree to these conditions when downloading the software. AB - National Transportation Library (NTL) Curation Note: This dataset has been curated to CoreTrustSeal's curation level "A. Active Preservation". To find out more information on CoreTrustSeal's curation levels, please consult their "Curation & Preservation Levels" CoreTrustSeal Discussion Paper" (https://doi.org/10.5281/zenodo.11476980). NTL staff last accessed this dataset at its repository URL on 2026-01-15. If, in the future, you have trouble accessing this dataset, please submit your question at https://transportation.libanswers.com. NTL staff will do its best to assist you at that time. AN - dot:88717 KW - Culverts KW - Hydraulics KW - Software packages KW - Analysis KW - Design LA - English PB - United States. Federal Highway Administration. Office of Bridges and Structures PY - 2025-03-05 TI - HY-8 Culvert Hydraulic Analysis Program Version 8.0.1.2 [supporting software] M3 - Software N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/88717 ER -
HY-8 Culvert Hydraulic Analysis Program Version 8.0.0 [supporting software]

United States. Federal Highway Administration. Office of Bridges and Structures

2024-05-29 | ZIP

HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software.Improv ...

01/27/2026

Title : HY-8 Culvert Hydraulic Analysis Program Version 8.0.0 [supporting software] Corporate Creator(s) : United States. Federal Highway Administration. Office of Bridges and Structures Contributor(s) : Lizewski, Ryan Published Date : 2024-05-29 URL : https://rosap.ntl.bts.gov/view/dot/88716 United States. Federal Highway Administration. Office of Bridges and Structures (2024). HY-8 Culvert Hydraulic Analysis Program Version 8.0.0 [supporting software]. United States. Federal Highway Administration. Office of Bridges and Structures "HY-8 Culvert Hydraulic Analysis Program Version 8.0.0 [supporting software]" (2024) United States. Federal Highway Administration. Office of Bridges and Structures "HY-8 Culvert Hydraulic Analysis Program Version 8.0.0 [supporting software]" , 2024 Export RIS Citation Information. TY - Software A2 - United States. Federal Highway Administration. Office of Bridges and Structures A4 - Lizewski, Ryan AB - HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software. AB - Improvements made to this version of the software include the following: Implemented new feature: Alternative culvert design analysis. Bugfix for hydraulic jumps with improper stationing when stationing is decreasing. Bugfix WSP profile selection. Bugfix with the report generator using the wrong index. Implement feature request to modify the page orientation, margin size, and line spacing of generated reports. Implement the "Project Headwater Summary Table" report element. Added HW/D to the Culvert Barrel Summary. Added "Essential Data Report" Format. Bugfix for unit conversion on USBR VI stilling basin energy dissipator. Bugfix for the wrong Manning's n value being used in full flow in certain circumstances. Bugfix for losing the constant roadway elevation. Bugfix for iterating on very small flows. Bugfix for issue selecting a user-defined shape with embedment. Bugfix for embedded user-defined culverts losing points and display in front-view plot. Bugfix for broken-back culvert data not refreshing with changes. Bugfix for units and computations with elliptical and pipe-arch culverts. Implemented feature request for a note in energy dissipation that we have culvert protection methods in the Hydraulic Toolbox. Bugfix for interpolation method in determining the inlet control depth. Bugfix for different water surface profile data when comparing the same culvert with different stationing values. Bugfix to handle changes in virtual earth. Bugfix for column headings swapped in report. Bugfix for depressed culvert being applied to a broken-back culvert. Bugfix for designing energy dissipation with a SAF basin that did not converge. Improved the USGS Flow Type chart. AB - By downloading the software, users acknowledge that they have read and agree to the following conditions: The application of this software is the responsibility of the user. It is imperative that the responsible designer understands the potential accuracy limitations of the program results, independently cross checks those results with other methods, and examines the reasonableness of the results with engineering knowledge and experience. There are no expressed or implied warranties. I agree to these conditions when downloading the software. AB - National Transportation Library (NTL) Curation Note: This dataset has been curated to CoreTrustSeal's curation level "A. Active Preservation". To find out more information on CoreTrustSeal's curation levels, please consult their "Curation & Preservation Levels" CoreTrustSeal Discussion Paper" (https://doi.org/10.5281/zenodo.11476980). NTL staff last accessed this dataset at its repository URL on 2026-01-15. If, in the future, you have trouble accessing this dataset, please submit your question at https://transportation.libanswers.com. NTL staff will do its best to assist you at that time. AN - dot:88716 KW - Culverts KW - Hydraulics KW - Software packages KW - Analysis KW - Design LA - English PB - United States. Federal Highway Administration. Office of Bridges and Structures PY - 2024-05-29 TI - HY-8 Culvert Hydraulic Analysis Program Version 8.0.0 [supporting software] M3 - Software N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/88716 ER -
Identify Mapping Techniques of Invasive Plant Species Within the MDOT Right-of-Way

Dobson, Richard J.

;

Brooks, Colin

2025-10-06 | PDF

Invasive species can be detrimental to our communities and environment as they can cause economic or environmental harm, including harm to human, animal, or plant health. These species thrive in transportation corridors which can be used to spread into new areas. This project focused on mapping four invasive plant species common reed (Phragmites au ...

01/27/2026

Title : Identify Mapping Techniques of Invasive Plant Species Within the MDOT Right-of-Way Creator(s) : Dobson, Richard J.;Brooks, Colin;Jenkins, Abby;Berger, Sam;Bilt, Dorthea Vander;Cook, Chris;Lowe, Rebecca; Corporate Creator(s) : Michigan Technological University Corporate Contributor(s) : Michigan. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-10-06 Report Number : SPR-1759 URL : https://rosap.ntl.bts.gov/view/dot/88715 Dobson, Richard J. et al. (2025). Identify Mapping Techniques of Invasive Plant Species Within the MDOT Right-of-Way. Dobson, Richard J. et al. "Identify Mapping Techniques of Invasive Plant Species Within the MDOT Right-of-Way" (2025) Dobson, Richard J. et al. "Identify Mapping Techniques of Invasive Plant Species Within the MDOT Right-of-Way" , 2025 Export RIS Citation Information. TY - Tech Report AU - Dobson, Richard J. AU - Brooks, Colin AU - Jenkins, Abby AU - Berger, Sam AU - Bilt, Dorthea Vander AU - Cook, Chris AU - Lowe, Rebecca A2 - Michigan Technological University A3 - Michigan. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Invasive species can be detrimental to our communities and environment as they can cause economic or environmental harm, including harm to human, animal, or plant health. These species thrive in transportation corridors which can be used to spread into new areas. This project focused on mapping four invasive plant species common reed (Phragmites australis), Japanese knotweed (Fallopia japonica), wild parsnip (Pastinaca sativa), and leafy spurge (Euphorbia esula). The selection of these species was made based on the researchers’ previous experience with mapping invasive species and recommendations from MDOT. Mapping guidelines were developed for each species which includes, drone collection parameters, necessary data layers, classification methodologies, and accuracies of the mapping methods. AN - dot:88715 ET - Final Report: 10/11/2023 – 9/30/2025 KW - Drones KW - Invasive plants KW - Mapping KW - Classification KW - Remote sensing KW - Right of way (Traffic) KW - Plants LA - English PB - Michigan Department of Transportation. Research Administration PY - 2025-10-06 SN - SPR-1759 TI - Identify Mapping Techniques of Invasive Plant Species Within the MDOT Right-of-Way M3 - Tech Report N1 - United States N1 - 2022-0432 Z2 UR - https://rosap.ntl.bts.gov/view/dot/88715 ER -
HY-8 Culvert Hydraulic Analysis Program Version 7.80.2 [supporting software]

United States. Federal Highway Administration. Office of Bridges and Structures

2022-11-29 | ZIP

HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software.Bugs a ...

01/27/2026

Title : HY-8 Culvert Hydraulic Analysis Program Version 7.80.2 [supporting software] Corporate Creator(s) : United States. Federal Highway Administration. Office of Bridges and Structures Contributor(s) : Lizewski, Ryan Published Date : 2022-11-29 URL : https://rosap.ntl.bts.gov/view/dot/88714 United States. Federal Highway Administration. Office of Bridges and Structures (2022). HY-8 Culvert Hydraulic Analysis Program Version 7.80.2 [supporting software]. United States. Federal Highway Administration. Office of Bridges and Structures "HY-8 Culvert Hydraulic Analysis Program Version 7.80.2 [supporting software]" (2022) United States. Federal Highway Administration. Office of Bridges and Structures "HY-8 Culvert Hydraulic Analysis Program Version 7.80.2 [supporting software]" , 2022 Export RIS Citation Information. TY - Software A2 - United States. Federal Highway Administration. Office of Bridges and Structures A4 - Lizewski, Ryan AB - HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software. AB - Bugs addressed: Addressed a low flow channel calculation in the AOP module causing a crash. Adjusted the display of the selected profile instead of defaulting to the overtopping profile. Fixed the display of the question mark (?) icon for the user’s manual, which did not appear in the Energy Dissipation module for some screen resolutions. Addressed metric rating curves being compared to the invert elevation before being converted. Fixed issue with report generation failing on names with quotes (‘ or “) in the name. Fixed issue where roadway crest was modified when saved and read from a file. Fixed issue where the diameter on an embedded circular culvert was lost when saved and read from a file. Fixed issue where the wrong flow area was computed for a given depth. Fixed incorrect area of pipe arch listed for display. Fixed incorrect geometry for a pipe arch. Improved iteration success rate to 99.8% in testing most problematic cases; a failure caused a decrease in HW with increased discharge. This problem was resolved. Fixed issue where selecting an inlet edge type caused HY-8 to crash. Fixed issue where duplicating a culvert barrel on a crossing with multiple discharges crashed. Modified HY-8 to not allow the user to try (and fail) to generate a report where the filename exists and is locked. AB - Adjusted some language in the user’s manual. AB - Fixed minor issues in the Bridge scour combo boxes. AB - By downloading the software, users acknowledge that they have read and agree to the following conditions: The application of this software is the responsibility of the user. It is imperative that the responsible designer understands the potential accuracy limitations of the program results, independently cross checks those results with other methods, and examines the reasonableness of the results with engineering knowledge and experience. There are no expressed or implied warranties. I agree to these conditions when downloading the software. AB - National Transportation Library (NTL) Curation Note: This dataset has been curated to CoreTrustSeal's curation level "A. Active Preservation". To find out more information on CoreTrustSeal's curation levels, please consult their "Curation & Preservation Levels" CoreTrustSeal Discussion Paper" (https://doi.org/10.5281/zenodo.11476980). NTL staff last accessed this dataset at its repository URL on 2026-01-15. If, in the future, you have trouble accessing this dataset, please submit your question at https://transportation.libanswers.com. NTL staff will do its best to assist you at that time. AN - dot:88714 KW - Culverts KW - Hydraulics KW - Software packages KW - Analysis KW - Design LA - English PB - United States. Federal Highway Administration. Office of Bridges and Structures PY - 2022-11-29 TI - HY-8 Culvert Hydraulic Analysis Program Version 7.80.2 [supporting software] M3 - Software N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/88714 ER -
HY-8 Culvert Hydraulic Analysis Program Version 7.70.2 [supporting software]

United States. Federal Highway Administration. Office of Bridges and Structures

2022-04-12 | ZIP

HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software.Bug fi ...

01/27/2026

Title : HY-8 Culvert Hydraulic Analysis Program Version 7.70.2 [supporting software] Corporate Creator(s) : United States. Federal Highway Administration. Office of Bridges and Structures Contributor(s) : Lizewski, Ryan Published Date : 2022-04-12 URL : https://rosap.ntl.bts.gov/view/dot/88713 United States. Federal Highway Administration. Office of Bridges and Structures (2022). HY-8 Culvert Hydraulic Analysis Program Version 7.70.2 [supporting software]. United States. Federal Highway Administration. Office of Bridges and Structures "HY-8 Culvert Hydraulic Analysis Program Version 7.70.2 [supporting software]" (2022) United States. Federal Highway Administration. Office of Bridges and Structures "HY-8 Culvert Hydraulic Analysis Program Version 7.70.2 [supporting software]" , 2022 Export RIS Citation Information. TY - Software A2 - United States. Federal Highway Administration. Office of Bridges and Structures A4 - Lizewski, Ryan AB - HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software. AB - Bug fixes include: Corrected the Froude Number for energy dissipator calculations to use hydraulic depth instead of hydraulic radius. Corrected an issue with a specific multiple culvert barrel calculation. Corrected an issue with flow area calculations in the 'water surface profile data dialog for embedded circular culverts. AB - By downloading the software, users acknowledge that they have read and agree to the following conditions: The application of this software is the responsibility of the user. It is imperative that the responsible designer understands the potential accuracy limitations of the program results, independently cross checks those results with other methods, and examines the reasonableness of the results with engineering knowledge and experience. There are no expressed or implied warranties. I agree to these conditions when downloading the software. AB - National Transportation Library (NTL) Curation Note: This dataset has been curated to CoreTrustSeal's curation level "A. Active Preservation". To find out more information on CoreTrustSeal's curation levels, please consult their "Curation & Preservation Levels" CoreTrustSeal Discussion Paper" (https://doi.org/10.5281/zenodo.11476980). NTL staff last accessed this dataset at its repository URL on 2026-01-15. If, in the future, you have trouble accessing this dataset, please submit your question at https://transportation.libanswers.com. NTL staff will do its best to assist you at that time. AN - dot:88713 KW - Culverts KW - Hydraulics KW - Software packages KW - Analysis KW - Design LA - English PB - United States. Federal Highway Administration. Office of Bridges and Structures PY - 2022-04-12 TI - HY-8 Culvert Hydraulic Analysis Program Version 7.70.2 [supporting software] M3 - Software N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/88713 ER -
HY-8 Culvert Hydraulic Analysis Program Version 7.70 [supporting software]

United States. Federal Highway Administration. Office of Bridges and Structures

2021-06-02 | ZIP

HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software.Improv ...

01/27/2026

Title : HY-8 Culvert Hydraulic Analysis Program Version 7.70 [supporting software] Corporate Creator(s) : United States. Federal Highway Administration. Office of Bridges and Structures Contributor(s) : Lizewski, Ryan Published Date : 2021-06-02 URL : https://rosap.ntl.bts.gov/view/dot/88712 United States. Federal Highway Administration. Office of Bridges and Structures (2021). HY-8 Culvert Hydraulic Analysis Program Version 7.70 [supporting software]. United States. Federal Highway Administration. Office of Bridges and Structures "HY-8 Culvert Hydraulic Analysis Program Version 7.70 [supporting software]" (2021) United States. Federal Highway Administration. Office of Bridges and Structures "HY-8 Culvert Hydraulic Analysis Program Version 7.70 [supporting software]" , 2021 Export RIS Citation Information. TY - Software A2 - United States. Federal Highway Administration. Office of Bridges and Structures A4 - Lizewski, Ryan AB - HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software. AB - Improvements made to this version of the software include the following: Added a secondary versioning number. Updated the Quick Start Guide. Upgraded the interface for high pixel density displays and updated interface icons. Upgraded to a new library to export data to the report generator with Microsoft Word format (DOCX). Added an option to set default unit system, outlet control, and exit loss. Added irregular roadway plot minimum and maximum crest elevations in the side view. Increased the number of irregular roadway plot points from 15 to 5000. Added Manning’s n value and plot of critical depth in the tailwater channel. Added feedback to the user when irregular tailwater channel is insufficient for the specified flow. Improved HY-8 tailwater computations to better handle surcharge situations. Added culvert size on the results page. Added Ke value of the inlet edge types and the culvert barrel slope in the Edit Crossing window. Added max shear stress to the AOP table. Provided testing information to the user in the HY-8 User’s manual. AB - By downloading the software, users acknowledge that they have read and agree to the following conditions: The application of this software is the responsibility of the user. It is imperative that the responsible designer understands the potential accuracy limitations of the program results, independently cross checks those results with other methods, and examines the reasonableness of the results with engineering knowledge and experience. There are no expressed or implied warranties. I agree to these conditions when downloading the software. AB - National Transportation Library (NTL) Curation Note: This dataset has been curated to CoreTrustSeal's curation level "A. Active Preservation". To find out more information on CoreTrustSeal's curation levels, please consult their "Curation & Preservation Levels" CoreTrustSeal Discussion Paper" (https://doi.org/10.5281/zenodo.11476980). NTL staff last accessed this dataset at its repository URL on 2026-01-15. If, in the future, you have trouble accessing this dataset, please submit your question at https://transportation.libanswers.com. NTL staff will do its best to assist you at that time. AN - dot:88712 KW - Culverts KW - Hydraulics KW - Software packages KW - Analysis KW - Design LA - English PB - United States. Federal Highway Administration. Office of Bridges and Structures PY - 2021-06-02 TI - HY-8 Culvert Hydraulic Analysis Program Version 7.70 [supporting software] M3 - Software N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/88712 ER -
HY-8 Culvert Hydraulic Analysis Program Version 7.60 [supporting software]

United States. Federal Highway Administration. Office of Bridges and Structures

2019-07-30 | ZIP

HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software.Build ...

01/27/2026

Title : HY-8 Culvert Hydraulic Analysis Program Version 7.60 [supporting software] Corporate Creator(s) : United States. Federal Highway Administration. Office of Bridges and Structures Contributor(s) : Lizewski, Ryan Published Date : 2019-07-30 URL : https://rosap.ntl.bts.gov/view/dot/88711 United States. Federal Highway Administration. Office of Bridges and Structures (2019). HY-8 Culvert Hydraulic Analysis Program Version 7.60 [supporting software]. United States. Federal Highway Administration. Office of Bridges and Structures "HY-8 Culvert Hydraulic Analysis Program Version 7.60 [supporting software]" (2019) United States. Federal Highway Administration. Office of Bridges and Structures "HY-8 Culvert Hydraulic Analysis Program Version 7.60 [supporting software]" , 2019 Export RIS Citation Information. TY - Software A2 - United States. Federal Highway Administration. Office of Bridges and Structures A4 - Lizewski, Ryan AB - HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software. AB - Build Date July 30, 2019. This version does not include new features, but rather: 1) corrects computational issues with embedded circular culverts, 2) fixes many reported bugs, 3) improves computational stability, and 4) updates the user interface. The HY-8 User’s Manual included with the software package (available by selecting “HY-8 Help” in the “Help” drop-down menu) describes the corrections to the embedded circular culvert logic in Section 4.1, Embedment Depth. Please email Eric Brown (eric.r.brown@dot.gov) if you want additional details on the implemented corrections to embedded circular culverts and a complete list of maintenance items implemented in Version 7.60. AB - By downloading the software, users acknowledge that they have read and agree to the following conditions: The application of this software is the responsibility of the user. It is imperative that the responsible designer understands the potential accuracy limitations of the program results, independently cross checks those results with other methods, and examines the reasonableness of the results with engineering knowledge and experience. There are no expressed or implied warranties. I agree to these conditions when downloading the software. AB - National Transportation Library (NTL) Curation Note: This dataset has been curated to CoreTrustSeal's curation level "A. Active Preservation". To find out more information on CoreTrustSeal's curation levels, please consult their "Curation & Preservation Levels" CoreTrustSeal Discussion Paper" (https://doi.org/10.5281/zenodo.11476980). NTL staff last accessed this dataset at its repository URL on 2026-01-15. If, in the future, you have trouble accessing this dataset, please submit your question at https://transportation.libanswers.com. NTL staff will do its best to assist you at that time. AN - dot:88711 KW - Culverts KW - Hydraulics KW - Software packages KW - Analysis KW - Design LA - English PB - United States. Federal Highway Administration. Office of Bridges and Structures PY - 2019-07-30 TI - HY-8 Culvert Hydraulic Analysis Program Version 7.60 [supporting software] M3 - Software N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/88711 ER -

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