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Showing 441 - 460 of 501 results

PEDAT: A Pedestrian Data Platform

Singleton, Patrick A.

;

Rafe, Amir

2026-06-01 | PDF

The objective of this work was to develop a robust pedestrian data (PEDAT) platform-built upon high-resolution traffic signal data and research relating push-button data to pedestrian volumes-that can be used to monitor pedestrian activity and provide pedestrian data for a variety of tasks in planning, design, operations, and management. Following ...

08/03/2026

Title : PEDAT: A Pedestrian Data Platform Creator(s) : Singleton, Patrick A.;Rafe, Amir; Corporate Creator(s) : Utah State University. Department of Civil and Environmental Engineering Corporate Contributor(s) : Utah. Department of Transportation. Research and Innovation Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-06-01 Report Number : UT-26.10 URL : https://rosap.ntl.bts.gov/view/dot/92779
Singleton, P. A., & Rafe, A. (2026). PEDAT: A Pedestrian Data Platform (Report No. UT-26.10). Utah Department of Transportation. https://rosap.ntl.bts.gov/view/dot/92779

Singleton, Patrick A. and Amir Rafe. PEDAT: A Pedestrian Data Platform. Report no. UT-26.10. Utah Department of Transportation, 2026. https://rosap.ntl.bts.gov/view/dot/92779.

Singleton, Patrick A., and Amir Rafe PEDAT: A Pedestrian Data Platform. Utah Department of Transportation, 2026, Report no. UT-26.10, ROSA P. https://rosap.ntl.bts.gov/view/dot/92779.
Export RIS Citation Information. TY - Tech Report AU - Singleton, Patrick A. AU - Rafe, Amir A2 - Utah State University. Department of Civil and Environmental Engineering A3 - Utah. Department of Transportation. Research and Innovation Division A3 - United States. Department of Transportation. Federal Highway Administration AB - The objective of this work was to develop a robust pedestrian data (PEDAT) platform-built upon high-resolution traffic signal data and research relating push-button data to pedestrian volumes-that can be used to monitor pedestrian activity and provide pedestrian data for a variety of tasks in planning, design, operations, and management. Following a series of three stakeholder meetings and an iterative design process, the research team started with an existing prototype and created an entirely new and more functional PEDAT Version 1. The online dashboard allows users to select multiple signal locations, filtered by date, and view figures, maps, and tables that summarize and visualize the estimated pedestrian volumes in various ways. The data, charts, and a PDF report can be downloaded. One limitation is that the data for PEDAT Version 1 had to be manually processed by the research team. Therefore, to implement this research, the Utah Department of Transportation (UDOT) and its contractors integrated PEDAT into their Automated Traffic Signal Performance Measures (ATSPM) system, relying on automatically aggregated and archived signal data housed in a cloud computing database. The latest version of PEDAT is the "Pedestrian Activity" feature in UDOT's ATSPM Version 5.2, and it has been operating online with data since January 2026. As a result of this project, anyone can extract estimated pedestrian volumes at nearly 2,000 signals throughout Utah, thus aiding important efforts in pedestrian transportation planning, design, and operations. AN - dot:92779 DA - 2026-06-01 ET - Final Report: Mar 2022 to Jun 2026 KW - Pedestrians KW - Walking KW - Traffic signals KW - Pedestrian detection KW - Visualization KW - Data science KW - Transportation planning KW - Traffic data LA - English PB - Utah Department of Transportation PY - 2026 SN - UT-26.10 TI - PEDAT: A Pedestrian Data Platform M3 - Tech Report N1 - United States N1 - 22-8892 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92779 ER -
COLLABORATIVE: SEAHIVE® Solutions to Mitigate Bridge Scour-Phase I Scour [supporting dataset]

Kulesza, Stacey

;

Akte, Sonia

2026-07-06 | txt

This data set contains experimental and computational results from a multi‑phase study evaluating SEAHIVE® structures as scour mitigation countermeasures for bridge monopile foundations. The files include laboratory flume measurements for single vertical SEAHIVE units, grouped horizontal SEAHIVE configurations at multiple spacings, and correspondin ...

08/03/2026

Supporting Files

Title : COLLABORATIVE: SEAHIVE® Solutions to Mitigate Bridge Scour-Phase I Scour [supporting dataset] Creator(s) : Kulesza, Stacey;Akte, Sonia;Castillom, Rodolfo;Faroughi, Salah;Rhode-Barbarigos, Landolf; Corporate Creator(s) : Texas State University--San Marcos. Dept. of Engineering Technology;University of Utah;University of Miami; Corporate Contributor(s) : CREATE - Coastal REsearch And Transportation Education;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 : 2026-07-06 DOI : https://doi.org/10.5281/zenodo.18175863
Kulesza, S., Akte, S., Castillom, R., Faroughi, S., & Rhode-Barbarigos, L. (2026). COLLABORATIVE: SEAHIVE® Solutions to Mitigate Bridge Scour-Phase I Scour [supporting dataset]. CREATE - Coastal REsearch And Transportation Education. https://doi.org/10.5281/zenodo.18175863

Kulesza, Stacey, Sonia Akte, Rodolfo Castillom, Salah Faroughi, and Landolf Rhode-Barbarigos. COLLABORATIVE: SEAHIVE® Solutions to Mitigate Bridge Scour-Phase I Scour [supporting dataset]. CREATE - Coastal REsearch And Transportation Education, 2026. https://doi.org/10.5281/zenodo.18175863.

Kulesza, Stacey, et al. COLLABORATIVE: SEAHIVE® Solutions to Mitigate Bridge Scour-Phase I Scour [supporting dataset]. CREATE - Coastal REsearch And Transportation Education, 2026, ROSA P. https://doi.org/10.5281/zenodo.18175863.
Export RIS Citation Information. TY - Dataset AU - Kulesza, Stacey AU - Akte, Sonia AU - Castillom, Rodolfo AU - Faroughi, Salah AU - Rhode-Barbarigos, Landolf A2 - Texas State University--San Marcos. Dept. of Engineering Technology A2 - University of Utah A2 - University of Miami A3 - CREATE - Coastal REsearch And Transportation Education 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 - This data set contains experimental and computational results from a multi‑phase study evaluating SEAHIVE® structures as scour mitigation countermeasures for bridge monopile foundations. The files include laboratory flume measurements for single vertical SEAHIVE units, grouped horizontal SEAHIVE configurations at multiple spacings, and corresponding circular monopile control tests, as well as case setup information for the two‑phase numerical modeling framework used in the associated SEAHIVE report, conference presentations, and journal publications. Together, these data support analysis of clear‑water scour development, equilibrium scour depth and volume, bed morphology, and near‑bed hydraulic behavior under different SEAHIVE geometric and spacing configurations, and they provide the basis for validating high‑fidelity SedFOAM/OpenFOAM simulations against physical experiments. This study was funded by the U.S. Department of Transportation through the Coastal REsearch and Transportation Education University Transportation Center under Grant Award Number 69A3552348330. AB - The total size of the ZIP file is 2.33KB AB - This item is made available under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license https://creativecommons.org/licenses/by/4.0/. Use the following citation: Kulesza, S. (2026). Data files for SEAHIVE solutions to mitigate bridge scour - Phase I Scour [Dataset]. Zenodo. https://doi.org/10.5281/zenodo.18175863 AN - dot:92778 DA - 2026-07-06 DO - https://doi.org/10.5281/zenodo.18175863 KW - Bridges KW - Scour KW - Flow KW - Countermeasures KW - Sediments KW - Morphology KW - Data KW - SEAHIVE® KW - Scour mitigation KW - SedFOAM KW - Flow-structure interaction LA - English PB - CREATE - Coastal REsearch And Transportation Education PY - 2026 TI - COLLABORATIVE: SEAHIVE® Solutions to Mitigate Bridge Scour-Phase I Scour [supporting dataset] M3 - Dataset N1 - United States N1 - This item is made available under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license https://creativecommons.org/licenses/by/4.0/. Use the following citation: Kulesza, S. (2026). Data files for SEAHIVE solutions to mitigate bridge scour - Phase I Scour [Dataset]. Zenodo. https://doi.org/10.5281/zenodo.18175863 N1 - 69A3552348330 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92778 ER -
Development of a Pedestrian Collision Avoidance System for Connected and Autonomous Vehicles With Cooperative Perception

Yang, Di

;

Taherpour, Abolfazl

2025-10-31 | PDF

Pedestrian safety remains a major challenge in urban transportation, especially when connected and automated vehicles (CAVs) must operate under occlusion, limited line-of-sight, and unpredictable pedestrian behavior. Pedestrians hidden by parked vehicles, roadside obstacles, or complex roadway geometry may not be detected in time by onboard sensors ...

08/03/2026

Title : Development of a Pedestrian Collision Avoidance System for Connected and Autonomous Vehicles With Cooperative Perception Creator(s) : Yang, Di;Taherpour, Abolfazl;Jeihani, Mansoureh;Cheng, Lei;Yang, Terry; Corporate Creator(s) : Morgan State University. Safety and Mobility Advancements Regional Transportation and Economics Research Center 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 : 2025-10-31 Report Number : SM21 URL : https://rosap.ntl.bts.gov/view/dot/92777
Yang, D., Taherpour, A., Jeihani, M., Cheng, L., & Yang, T. (2025). Development of a Pedestrian Collision Avoidance System for Connected and Autonomous Vehicles With Cooperative Perception (Report No. SM21). Morgan State University. Sustainable Mobility and Accessibility Regional Transportation Equity Research Center (SMARTER) Region 3 University Transportation Center (UTC). https://rosap.ntl.bts.gov/view/dot/92777

Yang, Di, Abolfazl Taherpour, Mansoureh Jeihani, Lei Cheng, and Terry Yang. Development of a Pedestrian Collision Avoidance System for Connected and Autonomous Vehicles With Cooperative Perception. Report no. SM21. Morgan State University. Sustainable Mobility and Accessibility Regional Transportation Equity Research Center (SMARTER) Region 3 University Transportation Center (UTC), 2025. https://rosap.ntl.bts.gov/view/dot/92777.

Yang, Di, et al. Development of a Pedestrian Collision Avoidance System for Connected and Autonomous Vehicles With Cooperative Perception. Morgan State University. Sustainable Mobility and Accessibility Regional Transportation Equity Research Center (SMARTER) Region 3 University Transportation Center (UTC), 2025, Report no. SM21, ROSA P. https://rosap.ntl.bts.gov/view/dot/92777.
Export RIS Citation Information. TY - Tech Report AU - Yang, Di AU - Taherpour, Abolfazl AU - Jeihani, Mansoureh AU - Cheng, Lei AU - Yang, Terry A2 - Morgan State University. Safety and Mobility Advancements Regional Transportation and Economics Research Center 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 - Pedestrian safety remains a major challenge in urban transportation, especially when connected and automated vehicles (CAVs) must operate under occlusion, limited line-of-sight, and unpredictable pedestrian behavior. Pedestrians hidden by parked vehicles, roadside obstacles, or complex roadway geometry may not be detected in time by onboard sensors alone, leaving insufficient time for safe braking or maneuvering. To address this limitation, a cooperative perception (CP)-enabled pedestrian collision avoidance framework is developed by integrating roadside sensing, onboard sensing, multi-sensor fusion, edge computing, and Vehicle-to-Everything (V2X) communication. A camera-LiDAR fusion pipeline is established to provide reliable object detection and unified outputs for pedestrians and vehicles by combining the semantic strengths of cameras with the geometric accuracy of LiDAR. Controlled demonstrations using a Level 4 CAV platform in an occluded pedestrian-crossing scenario show that infrastructure-assisted CP can provide early warning for hidden pedestrians and enable safe stopping, whereas onboard sensing alone may detect the pedestrian too late. The results demonstrate the feasibility and safety value of CP for pedestrian protection and support its future integration into the Morgan State University SMART Corridor as a broader infrastructure-assisted safety framework for connected urban transportation systems. AN - dot:92777 DA - 2025-10-31 ET - Final Report KW - Automated vehicle control KW - Cooperation KW - Autonomous vehicles KW - Pedestrians KW - Pedestrian safety KW - Crashes KW - Vehicle to everything communications KW - Infrastructure KW - Urban transportation KW - Cameras KW - Laser radar KW - Cooperative Perception LA - English PB - Morgan State University. Sustainable Mobility and Accessibility Regional Transportation Equity Research Center (SMARTER) Region 3 University Transportation Center (UTC) PY - 2025 SN - SM21 TI - Development of a Pedestrian Collision Avoidance System for Connected and Autonomous Vehicles With Cooperative Perception M3 - Tech Report N1 - United States N1 - 69A3552348303 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92777 ER -
Development of a Machine Learning and Large Language Model-Based Classification Tool for Automated Analysis of Transportation Public Comments

Knezevic, Milan

;

Neece, Trevor

2026-03-30 | PDF

Transportation agencies receive large volumes of free-form public comments describing infrastructure conditions, safety concerns, and service issues. Processing and classifying these comments manually is time-consuming, inconsistent, and difficult to scale, limiting their usefulness for operational decision-making. This study presents a machine lea ...

08/03/2026

Title : Development of a Machine Learning and Large Language Model-Based Classification Tool for Automated Analysis of Transportation Public Comments Creator(s) : Knezevic, Milan;Neece, Trevor;Stevanovic, Aleksandar;Khazanovich, Lev; Corporate Creator(s) : Morgan State University. Sustainable Mobility and Accessibility Regional Transportation Equity Research Center (SMARTER) Region 3 University Transportation Center (UTC);University of Pittsburgh; 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 : 2026-03-30 Report Number : SM45 URL : https://rosap.ntl.bts.gov/view/dot/92776
Knezevic, M., Neece, T., Stevanovic, A., & Khazanovich, L. (2026). Development of a Machine Learning and Large Language Model-Based Classification Tool for Automated Analysis of Transportation Public Comments (Report No. SM45). Morgan State University. Sustainable Mobility and Accessibility Regional Transportation Equity Research Center (SMARTER) Region 3 University Transportation Center (UTC). https://rosap.ntl.bts.gov/view/dot/92776

Knezevic, Milan, Trevor Neece, Aleksandar Stevanovic, and Lev Khazanovich. Development of a Machine Learning and Large Language Model-Based Classification Tool for Automated Analysis of Transportation Public Comments. Report no. SM45. Morgan State University. Sustainable Mobility and Accessibility Regional Transportation Equity Research Center (SMARTER) Region 3 University Transportation Center (UTC), 2026. https://rosap.ntl.bts.gov/view/dot/92776.

Knezevic, Milan, et al. Development of a Machine Learning and Large Language Model-Based Classification Tool for Automated Analysis of Transportation Public Comments. Morgan State University. Sustainable Mobility and Accessibility Regional Transportation Equity Research Center (SMARTER) Region 3 University Transportation Center (UTC), 2026, Report no. SM45, ROSA P. https://rosap.ntl.bts.gov/view/dot/92776.
Export RIS Citation Information. TY - Tech Report AU - Knezevic, Milan AU - Neece, Trevor AU - Stevanovic, Aleksandar AU - Khazanovich, Lev A2 - Morgan State University. Sustainable Mobility and Accessibility Regional Transportation Equity Research Center (SMARTER) Region 3 University Transportation Center (UTC) A2 - University of Pittsburgh 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 - Transportation agencies receive large volumes of free-form public comments describing infrastructure conditions, safety concerns, and service issues. Processing and classifying these comments manually is time-consuming, inconsistent, and difficult to scale, limiting their usefulness for operational decision-making. This study presents a machine learning and Large Language Model (LLM)-based framework for automated classification of transportation public comments across a three-level hierarchical taxonomy: Category, Subcategory, and Final Decision (Dismiss, Refer, Potential Project). Comments are encoded using MPNet sentence embeddings and indexed in a train-only vector database. Three classification strategies are evaluated: (1) an embedding-based k-nearest neighbors (kNN) baseline using cosine similarity, (2) a zero-shot/few-shot LLM with schema-constrained outputs, and (3) a retrieval-augmented LLM that incorporates semantically similar historical examples and concise label guidance during inference. Results indicate that while high-level categories are generally well separated, many public comments contain overlapping or multi-modal semantic content that spans multiple infrastructure types. To address this ambiguity, the retrieval-augmented LLM is evaluated using ordered predictions, allowing multiple plausible labels to be returned. This approach improves overall classification performance and provides richer context for agency review. Overall, the proposed framework demonstrates the potential of retrieval-augmented LLMs to support scalable, transparent, and decision-oriented processing of public transportation comments, enabling faster and higher-quality agency workflows. AN - dot:92776 DA - 2026-03-30 ET - Final Report KW - Classification KW - Machine learning KW - Public transit KW - Decision making KW - Performance KW - Infrastructure KW - Transportation safety KW - Literature reviews KW - Data processing operations KW - Large Language Models KW - Public Transportation Comments LA - English PB - Morgan State University. Sustainable Mobility and Accessibility Regional Transportation Equity Research Center (SMARTER) Region 3 University Transportation Center (UTC) PY - 2026 SN - SM45 TI - Development of a Machine Learning and Large Language Model-Based Classification Tool for Automated Analysis of Transportation Public Comments M3 - Tech Report N1 - United States N1 - 69A3552348303 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92776 ER -
Connected Vehicle Winter Safety Improvement With Infrared Thermography Technology

Zhu, Xuan ;

Yang, Xianfeng (Terry)

2025-12-01 | PDF

The primary objective of this research is to utilize dual-spectrum cameras, optical, and infrared thermography (IRT) cameras, to detect slippery road spots and high-crash-risk locations in winter seasons, using field evaluations and machine learning to improve detection algorithms. This capability can be used to detect road surface snow/ice pattern ...

08/03/2026

Title : Connected Vehicle Winter Safety Improvement With Infrared Thermography Technology Creator(s) : Zhu, Xuan;Yang, Xianfeng (Terry);Kami, Moein Ramezanpour; Corporate Creator(s) : University of Utah. Department of Civil and Environmental Engineering;University of Maryland (College Park, Md.). Department of Civil and Environmental Engineering; Corporate Contributor(s) : Utah. Department of Transportation. Research and Innovation Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-12-01 Report Number : UT-26.17 URL : https://rosap.ntl.bts.gov/view/dot/92775
Zhu, X., Yang, X. (., & Kami, M. R. (2025). Connected Vehicle Winter Safety Improvement With Infrared Thermography Technology (Report No. UT-26.17). Utah Department of Transportation. https://rosap.ntl.bts.gov/view/dot/92775

Zhu, Xuan, Xianfeng (Terry) Yang, and Moein Ramezanpour Kami. Connected Vehicle Winter Safety Improvement With Infrared Thermography Technology. Report no. UT-26.17. Utah Department of Transportation, 2025. https://rosap.ntl.bts.gov/view/dot/92775.

Zhu, Xuan, et al. Connected Vehicle Winter Safety Improvement With Infrared Thermography Technology. Utah Department of Transportation, 2025, Report no. UT-26.17, ROSA P. https://rosap.ntl.bts.gov/view/dot/92775.
Export RIS Citation Information. TY - Tech Report AU - Zhu, Xuan AU - Yang, Xianfeng (Terry) AU - Kami, Moein Ramezanpour A2 - University of Utah. Department of Civil and Environmental Engineering A2 - University of Maryland (College Park, Md.). Department of Civil and Environmental Engineering A3 - Utah. Department of Transportation. Research and Innovation Division A3 - United States. Department of Transportation. Federal Highway Administration AB - The primary objective of this research is to utilize dual-spectrum cameras, optical, and infrared thermography (IRT) cameras, to detect slippery road spots and high-crash-risk locations in winter seasons, using field evaluations and machine learning to improve detection algorithms. This capability can be used to detect road surface snow/ice patterns to augment or complement the Spot Weather Impact Warning (SWIW) application that UDOT is in the process of implementing. SWIW uses RWIS and Connected Vehicle (CV) data as inputs, whereas the proposed technology uses wayside IRT camaras and machine learning algorithms for direct measurements, which can be potentially extended for snow/ice detection at non-RWIS locations. The outcome of this research is expected to examine the feasibility of integrating IRT sensor data in future CV control systems. AN - dot:92775 DA - 2025-12-01 ET - Final Report: Oct 2022 to December 2025 KW - Winter maintenance KW - Highway safety KW - Snow KW - Ice KW - Infrared detectors KW - Computer vision KW - Machine learning KW - Weather conditions KW - Warning devices KW - Cameras KW - Connected vehicles KW - Data analysis LA - English PB - Utah Department of Transportation PY - 2025 SN - UT-26.17 TI - Connected Vehicle Winter Safety Improvement With Infrared Thermography Technology M3 - Tech Report N1 - United States N1 - 23-8194 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92775 ER -
AI-Powered Community Insights for Strategic Physical Transportation Infrastructure Management

Kennebeck, Kathryn A.

;

Smetana, Mason

2026-05-05 | PDF

This study examines how community feedback can inform transportation asset management, a field that has traditionally relied on physical condition metrics such as pavement age and roughness. Using 925 public comments collected by the Southwestern Pennsylvania Commission, the study applies a semi-automated workflow combining generative AI, natural l ...

08/03/2026

Title : AI-Powered Community Insights for Strategic Physical Transportation Infrastructure Management Creator(s) : Kennebeck, Kathryn A.;Smetana, Mason;Sukharev, Igor;Khazanovich, Lev; Corporate Creator(s) : University of Pittsburgh;Morgan State University. Safety and Mobility Advancements Regional Transportation and Economics Research Center; 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 : 2026-05-05 Report Number : SM09 URL : https://rosap.ntl.bts.gov/view/dot/92774
Kennebeck, K. A., Smetana, M., Sukharev, I., & Khazanovich, L. (2026). AI-Powered Community Insights for Strategic Physical Transportation Infrastructure Management (Report No. SM09). Morgan State University. Safety and Mobility Advancements Regional Transportation and Economics Research Center. https://rosap.ntl.bts.gov/view/dot/92774

Kennebeck, Kathryn A., Mason Smetana, Igor Sukharev, and Lev Khazanovich. AI-Powered Community Insights for Strategic Physical Transportation Infrastructure Management. Report no. SM09. Morgan State University. Safety and Mobility Advancements Regional Transportation and Economics Research Center, 2026. https://rosap.ntl.bts.gov/view/dot/92774.

Kennebeck, Kathryn A., et al. AI-Powered Community Insights for Strategic Physical Transportation Infrastructure Management. Morgan State University. Safety and Mobility Advancements Regional Transportation and Economics Research Center, 2026, Report no. SM09, ROSA P. https://rosap.ntl.bts.gov/view/dot/92774.
Export RIS Citation Information. TY - Tech Report AU - Kennebeck, Kathryn A. AU - Smetana, Mason AU - Sukharev, Igor AU - Khazanovich, Lev A2 - University of Pittsburgh A2 - Morgan State University. Safety and Mobility Advancements Regional Transportation and Economics Research Center 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 - This study examines how community feedback can inform transportation asset management, a field that has traditionally relied on physical condition metrics such as pavement age and roughness. Using 925 public comments collected by the Southwestern Pennsylvania Commission, the study applies a semi-automated workflow combining generative AI, natural language processing, and topic modeling to transform unstructured feedback into actionable themes. The comments were geolocated, linked to census tract income data, and analyzed with BERTopic to identify recurring concerns. Of the 925 comments, 864 were successfully geolocated and used in the tract-level analysis. The analysis produced 14 thematic clusters organized into three broad categories: Physical Infrastructure, Traffic Flow and Transit, and Non-Motorized User Safety. Approximately 30% of the comments focused directly on physical infrastructure concerns, including pavement condition, roadway design, and repair needs. A comparison with International Roughness Index data shows that community sentiment complements traditional performance measures by capturing concerns not visible in engineering metrics alone. The results also indicate differences in the type and urgency of concerns across census tracts. Overall, this study demonstrates that AI-assisted analysis can help transportation agencies process public input at scale and integrate community priorities more effectively into infrastructure decision-making. AN - dot:92774 DA - 2026-05-05 ET - Final Report KW - Artificial intelligence KW - Strategic planning KW - Digital infrastructure KW - Transportation system management KW - Transportation planning KW - Decision making KW - Pavement condition KW - Pedestrian safety KW - Asset management KW - Community action programs LA - English PB - Morgan State University. Safety and Mobility Advancements Regional Transportation and Economics Research Center PY - 2026 SN - SM09 TI - AI-Powered Community Insights for Strategic Physical Transportation Infrastructure Management M3 - Tech Report N1 - United States N1 - 69A3552348303 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92774 ER -
Physics-Based Modelling of Concrete Degradation Phenomena: Impact of Construction Defects on Long Term Cost and Material Properties

Salmeron, Manuel

;

Forero, Oscar

2026-02-27 | PDF

The quality of workmanship and adherence to specifications during the bridge construction phase of concrete decks, slabs, and continuous T-beams, are key factors on which future structural performance and durability hinge. If construction practices do not meet the required standards of quality, they may trigger early onset of deterioration processe ...

08/03/2026

Title : Physics-Based Modelling of Concrete Degradation Phenomena: Impact of Construction Defects on Long Term Cost and Material Properties Creator(s) : Salmeron, Manuel;Forero, Oscar;Faiz, Talha;Shrivastava, Kabir;Dyke, Shirley J.;Ramirez, Julio A.; Corporate Creator(s) : Purdue University. Joint Transportation Research Program Corporate Contributor(s) : Indiana Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-02-27 Report Number : FHWA/IN/JTRP-2026/14 DOI : https://doi.org/10.5703/1288284318622
Salmeron, M., Forero, O., Faiz, T., Shrivastava, K., Dyke, S. J., & Ramirez, J. A. (2026). Physics-Based Modelling of Concrete Degradation Phenomena: Impact of Construction Defects on Long Term Cost and Material Properties (Report No. FHWA/IN/JTRP-2026/14). Purdue University. Joint Transportation Research Program. https://doi.org/10.5703/1288284318622

Salmeron, Manuel, Oscar Forero, Talha Faiz, Kabir Shrivastava, Shirley J. Dyke, and Julio A. Ramirez. Physics-Based Modelling of Concrete Degradation Phenomena: Impact of Construction Defects on Long Term Cost and Material Properties. Report no. FHWA/IN/JTRP-2026/14. Purdue University. Joint Transportation Research Program, 2026. https://doi.org/10.5703/1288284318622.

Salmeron, Manuel, et al. Physics-Based Modelling of Concrete Degradation Phenomena: Impact of Construction Defects on Long Term Cost and Material Properties. Purdue University. Joint Transportation Research Program, 2026, Report no. FHWA/IN/JTRP-2026/14, ROSA P. https://doi.org/10.5703/1288284318622.
Export RIS Citation Information. TY - Tech Report AU - Salmeron, Manuel AU - Forero, Oscar AU - Faiz, Talha AU - Shrivastava, Kabir AU - Dyke, Shirley J. AU - Ramirez, Julio A. A2 - Purdue University. Joint Transportation Research Program A3 - Indiana Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The quality of workmanship and adherence to specifications during the bridge construction phase of concrete decks, slabs, and continuous T-beams, are key factors on which future structural performance and durability hinge. If construction practices do not meet the required standards of quality, they may trigger early onset of deterioration processes that shorten the service life leading to unplanned interventions or unscheduled repairs, thus intensifying the need for maintenance actions and increasing costs during the service life of the bridge. Despite the consensus view that substandard construction practices reduce the performance of concrete structures, quantifying the impact is challenging. This difficulty is owed to the various deterioration processes involved that can be quite complex and have significant uncertainty, and to the challenge in accurately establishing the initial condition of the bridge. In this project, the research team from Purdue University expands the framework developed in SPR-4526 by incorporating the quantification of service life and costs associated with the loss in durability and structural performance in the presence of an excessive amount of air voids. The effect of interventions and repairs on recovering the loss of life, and their added costs, are also quantified. AN - dot:92773 DA - 2026-02-27 DO - https://doi.org/10.5703/1288284318622 ET - Final Report KW - Corrosion KW - Life expectancy KW - Bridge decks KW - Chlorides KW - Durability KW - Construction and maintenance KW - Air voids KW - Deterioration KW - Life cycle costing KW - Physics KW - Degradation failures KW - Defects KW - T beams KW - Costs KW - physics-based mode LA - English PB - Purdue University. Joint Transportation Research Program PY - 2026 SN - FHWA/IN/JTRP-2026/14 TI - Physics-Based Modelling of Concrete Degradation Phenomena: Impact of Construction Defects on Long Term Cost and Material Properties M3 - Tech Report N1 - United States N1 - SPR-4840 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92773 ER -
Precast Concrete Deck Panels [Memorandum]

United States. Department of Transportation. Federal Highway Administration

1987-02-27 | Memoranda & Guidance: Guidance | PDF

Our survey of the Regions in October 1981 indicated there were 20 States using precast concrete deck panels for bridge deck construction. Except for Florida, the survey indicated that the States were experiencing no significant problems in the use of the deck panels. Nine States reported reflective cracking in the cast-in-place concrete topping, bu ...

08/03/2026

Title : Precast Concrete Deck Panels [Memorandum] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 1987-02-27 Series : Memoranda & Guidance: Guidance URL : https://rosap.ntl.bts.gov/view/dot/92772
United States. Department of Transportation. Federal Highway Administration (1987). Precast Concrete Deck Panels [Memorandum]. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/92772

United States. Department of Transportation. Federal Highway Administration. Precast Concrete Deck Panels [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 1987. https://rosap.ntl.bts.gov/view/dot/92772.

United States. Department of Transportation. Federal Highway Administration Precast Concrete Deck Panels [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 1987, ROSA P. https://rosap.ntl.bts.gov/view/dot/92772.
Export RIS Citation Information. TY - Memorandum A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - Our survey of the Regions in October 1981 indicated there were 20 States using precast concrete deck panels for bridge deck construction. Except for Florida, the survey indicated that the States were experiencing no significant problems in the use of the deck panels. Nine States reported reflective cracking in the cast-in-place concrete topping, but the tight hairline cracking was not considered a problem. However, Florida was experiencing extensive longitudinal and transverse cracking over the deck panels on many of their bridges. Florida issued a moratorium on the use of deck panels which is still in effect because of their concern about the possibility of excessively high maintenance costs due to crack related deterioration of the decks with time. Florida's problems were related to the use of non-rigid bearing of the panels on the beams and to curing problems. AN - dot:92772 DA - 1987-02-27 KW - Policy KW - Recommendations KW - Bridge decks KW - Precast concrete KW - Reinforced concrete bridges LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 1987 T2 - Memoranda & Guidance: Guidance TI - Precast Concrete Deck Panels [Memorandum] M3 - Memorandum N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92772 ER -
Non-Destructive Evaluation of Fracture Critical Members Fabricated from AASHTO M244 Grade 100 (ASTM A514/A517) Steel [Presentation]

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

2022-01-01 | PDF

This presentation discusses inspection and testing of fracture critical members fabricated from AASHTO M244 Grade 100 steel.

08/03/2026

Title : Non-Destructive Evaluation of Fracture Critical Members Fabricated from AASHTO M244 Grade 100 (ASTM A514/A517) Steel [Presentation] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration. Office of Bridges and Structures Published Date : 2022-01-01 URL : https://rosap.ntl.bts.gov/view/dot/92771
United States. Department of Transportation. Federal Highway Administration. Office of Bridges and Structures (2022). Non-Destructive Evaluation of Fracture Critical Members Fabricated from AASHTO M244 Grade 100 (ASTM A514/A517) Steel [Presentation]. United States. Department of Transportation. Federal Highway Administration. Office of Bridges and Structures. https://rosap.ntl.bts.gov/view/dot/92771

United States. Department of Transportation. Federal Highway Administration. Office of Bridges and Structures. Non-Destructive Evaluation of Fracture Critical Members Fabricated from AASHTO M244 Grade 100 (ASTM A514/A517) Steel [Presentation]. United States. Department of Transportation. Federal Highway Administration. Office of Bridges and Structures, 2022. https://rosap.ntl.bts.gov/view/dot/92771.

United States. Department of Transportation. Federal Highway Administration. Office of Bridges and Structures Non-Destructive Evaluation of Fracture Critical Members Fabricated from AASHTO M244 Grade 100 (ASTM A514/A517) Steel [Presentation]. United States. Department of Transportation. Federal Highway Administration. Office of Bridges and Structures, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/92771.
Export RIS Citation Information. TY - Presentations A2 - United States. Department of Transportation. Federal Highway Administration. Office of Bridges and Structures AB - This presentation discusses inspection and testing of fracture critical members fabricated from AASHTO M244 Grade 100 steel. AN - dot:92771 DA - 2022-01-01 KW - Steel bridges KW - Arch bridges KW - Nondestructive tests KW - Bridge members LA - English PB - United States. Department of Transportation. Federal Highway Administration. Office of Bridges and Structures PY - 2022 TI - Non-Destructive Evaluation of Fracture Critical Members Fabricated from AASHTO M244 Grade 100 (ASTM A514/A517) Steel [Presentation] M3 - Presentations N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92771 ER -
Evaluation of Steel Bridge Girders Damaged by Over-Height Vehicle Strikes Using Terrestrial Laser Scanning and Machine Learning

Ibrahim, Ahmed E.

;

Schissler, Limo R.

2026-07-01 | PDF

Bridge strikes caused by over-height vehicles frequently damage steel girders and can reduce their load-carrying capacity, requiring rapid and reliable evaluation to ensure structural safety. Current evaluation practices rely on manual measurements that often require traffic disruptions and simplified assessment approaches that do not fully capture ...

08/03/2026

Title : Evaluation of Steel Bridge Girders Damaged by Over-Height Vehicle Strikes Using Terrestrial Laser Scanning and Machine Learning Creator(s) : Ibrahim, Ahmed E.;Schissler, Limo R.;Fahnestock, Larry A.;LaFave, James M.;Elbanna, Ahmed E.; Corporate Creator(s) : Illinois Center for Transportation Corporate Contributor(s) : Illinois Department of Transportation. Bureau of Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-07-01 Report Number : FHWA-ICT-26-009;ICT-26-011;UILU-2026-2011; DOI : https://doi.org/10.36501/0197-9191/26-011
Ibrahim, A. E., Schissler, L. R., Fahnestock, L. A., LaFave, J. M., & Elbanna, A. E. (2026). Evaluation of Steel Bridge Girders Damaged by Over-Height Vehicle Strikes Using Terrestrial Laser Scanning and Machine Learning (Report No. FHWA-ICT-26-009). Illinois Center for Transportation. https://doi.org/10.36501/0197-9191/26-011

Ibrahim, Ahmed E., Limo R. Schissler, Larry A. Fahnestock, James M. LaFave, and Ahmed E. Elbanna. Evaluation of Steel Bridge Girders Damaged by Over-Height Vehicle Strikes Using Terrestrial Laser Scanning and Machine Learning. Report no. FHWA-ICT-26-009. Illinois Center for Transportation, 2026. https://doi.org/10.36501/0197-9191/26-011.

Ibrahim, Ahmed E., et al. Evaluation of Steel Bridge Girders Damaged by Over-Height Vehicle Strikes Using Terrestrial Laser Scanning and Machine Learning. Illinois Center for Transportation, 2026, Report no. FHWA-ICT-26-009, ROSA P. https://doi.org/10.36501/0197-9191/26-011.
Export RIS Citation Information. TY - Tech Report AU - Ibrahim, Ahmed E. AU - Schissler, Limo R. AU - Fahnestock, Larry A. AU - LaFave, James M. AU - Elbanna, Ahmed E. A2 - Illinois Center for Transportation A3 - Illinois Department of Transportation. Bureau of Research A3 - United States. Department of Transportation. Federal Highway Administration AB - Bridge strikes caused by over-height vehicles frequently damage steel girders and can reduce their load-carrying capacity, requiring rapid and reliable evaluation to ensure structural safety. Current evaluation practices rely on manual measurements that often require traffic disruptions and simplified assessment approaches that do not fully capture the effects of damage. In addition, finite element simulations are time-consuming and computationally intensive to develop for practical rapid evaluation. This study developed an integrated, data-driven framework for the inspection and assessment of damaged steel bridge girders. A semiautomated procedure was developed to process laser-scan point cloud data and extract displacement profiles along the girder span. Machine learning models were trained and validated using a dataset generated from finite element simulations informed by field measurements of actual bridge strike incidents to predict the residual capacity of damaged girders. Explainable artificial intelligence techniques were incorporated to interpret model predictions and identify key parameters influencing structural performance. Results demonstrated the framework's capabilities in effectively capturing girder displacements, and for accurately and efficiently estimating the residual capacity, to support post-strike bridge evaluation. Measured girder deformations obtained from laser scanning can be used as inputs to the machine learning models for quantifying a girder's capacity. The predicted capacity can then be incorporated into bridge rating software to compute rating factors, enabling rapid decisions on traffic restrictions and load posting. Additionally, the interpretability results can guide engineers in identifying critical design parameters and prioritizing repair actions. AN - dot:92770 DA - 2026-07-01 DO - https://doi.org/10.36501/0197-9191/26-011 ET - Final Report: 10/1/20-7/31/26 KW - Steel bridges KW - Girders KW - Impact KW - Structural damage KW - Bridges KW - Machine learning KW - Scanners KW - Point clouds KW - Girder bridges KW - Evaluation KW - Impact Damage KW - Low-Clearance Bridges KW - Terrestrial Laser Scanning LA - English PB - Illinois Center for Transportation PY - 2026 SN - FHWA-ICT-26-009 TI - Evaluation of Steel Bridge Girders Damaged by Over-Height Vehicle Strikes Using Terrestrial Laser Scanning and Machine Learning M3 - Tech Report N1 - United States N1 - R27-225 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92770 ER -
National Transportation Safety Board Recommendations [Memorandum]

United States. Department of Transportation. Federal Highway Administration

1995-11-15 | Memoranda & Guidance: Guidance | PDF

The National Transportation Safety Board (NTSB) conducted an investigation of an accident on September 22, 1993, when barges that were being pushed by the towboat MAUVILLA struck and displaced the Big Bayou Canot railroad bridge near Mobile, Alabama. Shortly thereafter, National Railroad Passenger Corporation(Amtrak) train 2, the Sunset Limited, en ...

08/03/2026

Title : National Transportation Safety Board Recommendations [Memorandum] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 1995-11-15 Series : Memoranda & Guidance: Guidance URL : https://rosap.ntl.bts.gov/view/dot/92769
United States. Department of Transportation. Federal Highway Administration (1995). National Transportation Safety Board Recommendations [Memorandum]. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/92769

United States. Department of Transportation. Federal Highway Administration. National Transportation Safety Board Recommendations [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 1995. https://rosap.ntl.bts.gov/view/dot/92769.

United States. Department of Transportation. Federal Highway Administration National Transportation Safety Board Recommendations [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 1995, ROSA P. https://rosap.ntl.bts.gov/view/dot/92769.
Export RIS Citation Information. TY - Memorandum A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - The National Transportation Safety Board (NTSB) conducted an investigation of an accident on September 22, 1993, when barges that were being pushed by the towboat MAUVILLA struck and displaced the Big Bayou Canot railroad bridge near Mobile, Alabama. Shortly thereafter, National Railroad Passenger Corporation(Amtrak) train 2, the Sunset Limited, enroute from Los Angeles, California, to Miami, Florida, with 220 persons on board, struck the displaced bridge and derailed. Forty-two passengers and five crew members were killed, and 103 passengers were injured. AN - dot:92769 DA - 1995-11-15 KW - Policy KW - Recommendations KW - Crash analysis KW - Railroad grade crossings KW - Bridges LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 1995 T2 - Memoranda & Guidance: Guidance TI - National Transportation Safety Board Recommendations [Memorandum] M3 - Memorandum N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92769 ER -
Advanced Air Mobility to Enhance Rural Freight Logistics [Research Brief]

Bridgelall, Raj

;

Askarzadeh, Taraneh

2026-02-01 | PDF

This research evaluated the feasibility of using AAM to enhance rural and regional freight logistics while preserving ground transportation infrastructure. The study applied an integrated, multi-method approach combining technology assessment, market analysis, infrastructure evaluation, and regulatory readiness analysis. The technology assessment e ...

08/03/2026

Title : Advanced Air Mobility to Enhance Rural Freight Logistics [Research Brief] Creator(s) : Bridgelall, Raj;Askarzadeh, Taraneh; Corporate Creator(s) : Upper Great Plains Transportation Institute;Center for Transformative Infrastructure Preservation and Sustainability (CTIPS) Region 8 University Transportation Center (UTC); 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 : 2026-02-01 Report Number : CTIPS-26-003 URL : https://rosap.ntl.bts.gov/view/dot/92768
Bridgelall, R., & Askarzadeh, T. (2026). Advanced Air Mobility to Enhance Rural Freight Logistics [Research Brief] (Report No. CTIPS-26-003). Upper Great Plains Transportation Institute. https://rosap.ntl.bts.gov/view/dot/92768

Bridgelall, Raj and Taraneh Askarzadeh. Advanced Air Mobility to Enhance Rural Freight Logistics [Research Brief]. Report no. CTIPS-26-003. Upper Great Plains Transportation Institute, 2026. https://rosap.ntl.bts.gov/view/dot/92768.

Bridgelall, Raj, and Taraneh Askarzadeh Advanced Air Mobility to Enhance Rural Freight Logistics [Research Brief]. Upper Great Plains Transportation Institute, 2026, Report no. CTIPS-26-003, ROSA P. https://rosap.ntl.bts.gov/view/dot/92768.
Export RIS Citation Information. TY - Brief AU - Bridgelall, Raj AU - Askarzadeh, Taraneh A2 - Upper Great Plains Transportation Institute A2 - Center for Transformative Infrastructure Preservation and Sustainability (CTIPS) Region 8 University Transportation Center (UTC) 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 - This research evaluated the feasibility of using AAM to enhance rural and regional freight logistics while preserving ground transportation infrastructure. The study applied an integrated, multi-method approach combining technology assessment, market analysis, infrastructure evaluation, and regulatory readiness analysis. The technology assessment examined aircraft performance constraints, propulsion efficiency, energy density limitations, and innovation trends in batteries and hydrogen systems using performance modeling, bibliometric analysis, and systematic patent review. AN - dot:92768 DA - 2026-02-01 ET - Research Brief KW - Cargo aircraft KW - Freight transportation KW - Geographic information systems KW - Machine learning KW - Market assessment KW - Regulation KW - Mobility KW - Vulnerable road users KW - Logistics KW - Rural transportation LA - English PB - Upper Great Plains Transportation Institute PY - 2026 SN - CTIPS-26-003 TI - Advanced Air Mobility to Enhance Rural Freight Logistics [Research Brief] M3 - Brief N1 - United States N1 - CTIPS-001 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92768 ER -
Hoan Bridge Failure Investigation [Memorandum]

Cooper, James D.

2001-07-10 | Memoranda & Guidance: Information | PDF

This memorandum presents the latest findings from the forensic investigation into the cause offailure of the Hoan Bridge in Milwaukee, Wisconsin.

08/03/2026

Title : Hoan Bridge Failure Investigation [Memorandum] Creator(s) : Cooper, James D. Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 2001-07-10 Series : Memoranda & Guidance: Information URL : https://rosap.ntl.bts.gov/view/dot/92767
Cooper, J. D. (2001). Hoan Bridge Failure Investigation [Memorandum]. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/92767

Cooper, James D.. Hoan Bridge Failure Investigation [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 2001. https://rosap.ntl.bts.gov/view/dot/92767.

Cooper, James D. Hoan Bridge Failure Investigation [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 2001, ROSA P. https://rosap.ntl.bts.gov/view/dot/92767.
Export RIS Citation Information. TY - Memorandum AU - Cooper, James D. A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - This memorandum presents the latest findings from the forensic investigation into the cause of AB - failure of the Hoan Bridge in Milwaukee, Wisconsin. AN - dot:92767 DA - 2001-07-10 KW - Policy KW - Recommendations KW - Failure KW - Bridges KW - Failure analysis LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2001 T2 - Memoranda & Guidance: Information TI - Hoan Bridge Failure Investigation [Memorandum] M3 - Memorandum N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92767 ER -
Technical Advisory 5140.28 - Construction Loads on Bridges [Memorandum]

Wright, Frederick G.

2007-08-08 | Memoranda & Guidance: Guidance | PDF

In the ongoing investigation of the collapse of the I-35W Bridge in Minneapolis, the National Transportation Safety Board has identified construction equipment and materials loading on the bridge as part of their review. While no conclusions have been reached, in an abundance of caution, we strongly advise the State Transportation Agencies and othe ...

08/03/2026

Title : Technical Advisory 5140.28 - Construction Loads on Bridges [Memorandum] Creator(s) : Wright, Frederick G. Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 2007-08-08 Series : Memoranda & Guidance: Guidance URL : https://rosap.ntl.bts.gov/view/dot/92766
Wright, F. G. (2007). Technical Advisory 5140.28 - Construction Loads on Bridges [Memorandum]. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/92766

Wright, Frederick G.. Technical Advisory 5140.28 - Construction Loads on Bridges [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 2007. https://rosap.ntl.bts.gov/view/dot/92766.

Wright, Frederick G. Technical Advisory 5140.28 - Construction Loads on Bridges [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 2007, ROSA P. https://rosap.ntl.bts.gov/view/dot/92766.
Export RIS Citation Information. TY - Memorandum AU - Wright, Frederick G. A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - In the ongoing investigation of the collapse of the I-35W Bridge in Minneapolis, the National Transportation Safety Board has identified construction equipment and materials loading on the bridge as part of their review. While no conclusions have been reached, in an abundance of caution, we strongly advise the State Transportation Agencies and other bridge owners who are engaged in or contemplating any construction operation on their bridges to ensure that any construction loading and stockpiled raw materials placed on a structure do not overload its members. AN - dot:92766 DA - 2007-08-08 KW - Policy KW - Recommendations KW - Bridges KW - Loads KW - Bridge construction LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2007 T2 - Memoranda & Guidance: Guidance TI - Technical Advisory 5140.28 - Construction Loads on Bridges [Memorandum] M3 - Memorandum N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92766 ER -
Guidance on Quality Control and Quality Assurance (QC/QA) In Bridge Design

United States. Department of Transportation. Federal Highway Administration

2011-08-01 | PDF

The purpose of this document is to provide guidance for developing and implementing a quality control and quality assurance program for the design of highway bridges.

08/03/2026

Title : Guidance on Quality Control and Quality Assurance (QC/QA) In Bridge Design Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 2011-08-01 URL : https://rosap.ntl.bts.gov/view/dot/92765
United States. Department of Transportation. Federal Highway Administration (2011). Guidance on Quality Control and Quality Assurance (QC/QA) In Bridge Design. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/92765

United States. Department of Transportation. Federal Highway Administration. Guidance on Quality Control and Quality Assurance (QC/QA) In Bridge Design. United States. Department of Transportation. Federal Highway Administration, 2011. https://rosap.ntl.bts.gov/view/dot/92765.

United States. Department of Transportation. Federal Highway Administration Guidance on Quality Control and Quality Assurance (QC/QA) In Bridge Design. United States. Department of Transportation. Federal Highway Administration, 2011, ROSA P. https://rosap.ntl.bts.gov/view/dot/92765.
Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - The purpose of this document is to provide guidance for developing and implementing a quality control and quality assurance program for the design of highway bridges. AN - dot:92765 DA - 2011-08-01 KW - Policy KW - Recommendations KW - Highway bridges KW - Bridge design KW - Quality control KW - Quality assurance LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2011 TI - Guidance on Quality Control and Quality Assurance (QC/QA) In Bridge Design M3 - Brief N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92765 ER -
Recommendations for Assessing and Managing Long-Term Performance of Post-Tensioned Bridges having Tendons Installed with Grout Containing Elevated Levels of Chloride [Technical Advisory]

United States. Department of Transportation. Federal Highway Administration

2013-11-12 | Memoranda & Guidance: Information | PDF

The purpose of this Technical Advisory is to give guidance to bridge owners on assessing and managing the long-term performance of post-tensioned bridges having tendons installed with grout containing elevated levels of chloride.

08/03/2026

Title : Recommendations for Assessing and Managing Long-Term Performance of Post-Tensioned Bridges having Tendons Installed with Grout Containing Elevated Levels of Chloride [Technical Advisory] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 2013-11-12 Series : Memoranda & Guidance: Information URL : https://rosap.ntl.bts.gov/view/dot/92764
United States. Department of Transportation. Federal Highway Administration (2013). Recommendations for Assessing and Managing Long-Term Performance of Post-Tensioned Bridges having Tendons Installed with Grout Containing Elevated Levels of Chloride [Technical Advisory]. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/92764

United States. Department of Transportation. Federal Highway Administration. Recommendations for Assessing and Managing Long-Term Performance of Post-Tensioned Bridges having Tendons Installed with Grout Containing Elevated Levels of Chloride [Technical Advisory]. United States. Department of Transportation. Federal Highway Administration, 2013. https://rosap.ntl.bts.gov/view/dot/92764.

United States. Department of Transportation. Federal Highway Administration Recommendations for Assessing and Managing Long-Term Performance of Post-Tensioned Bridges having Tendons Installed with Grout Containing Elevated Levels of Chloride [Technical Advisory]. United States. Department of Transportation. Federal Highway Administration, 2013, ROSA P. https://rosap.ntl.bts.gov/view/dot/92764.
Export RIS Citation Information. TY - Memorandum A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - The purpose of this Technical Advisory is to give guidance to bridge owners on assessing and managing the long-term performance of post-tensioned bridges having tendons installed with grout containing elevated levels of chloride. AN - dot:92764 DA - 2013-11-12 KW - Policy KW - Recommendations KW - Posttensioning KW - Bridges KW - Material tendons LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2013 T2 - Memoranda & Guidance: Information TI - Recommendations for Assessing and Managing Long-Term Performance of Post-Tensioned Bridges having Tendons Installed with Grout Containing Elevated Levels of Chloride [Technical Advisory] M3 - Memorandum N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92764 ER -
Use of Debris from Demolished Bridges and Overpasses [Memorandum]

United States. Department of Transportation. Federal Highway Administration

2006-03-07 | Memoranda & Guidance: Guidance | PDF

Please notify the States that they have the responsibility to administer or implement Public Law 109-59, August 10, 2005, Section 1805, "Use of Debris From Demolished Bridges and Overpasses." The legislation directs a State to first make the debris from the demolition of such structure available for beneficial use by a Federal, State, or local gove ...

08/03/2026

Title : Use of Debris from Demolished Bridges and Overpasses [Memorandum] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 2006-03-07 Series : Memoranda & Guidance: Guidance URL : https://rosap.ntl.bts.gov/view/dot/92763
United States. Department of Transportation. Federal Highway Administration (2006). Use of Debris from Demolished Bridges and Overpasses [Memorandum]. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/92763

United States. Department of Transportation. Federal Highway Administration. Use of Debris from Demolished Bridges and Overpasses [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 2006. https://rosap.ntl.bts.gov/view/dot/92763.

United States. Department of Transportation. Federal Highway Administration Use of Debris from Demolished Bridges and Overpasses [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 2006, ROSA P. https://rosap.ntl.bts.gov/view/dot/92763.
Export RIS Citation Information. TY - Memorandum A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - Please notify the States that they have the responsibility to administer or implement Public Law 109-59, August 10, 2005, Section 1805, "Use of Debris From Demolished Bridges and Overpasses." The legislation directs a State to first make the debris from the demolition of such structure available for beneficial use by a Federal, State, or local government, unless such use obstructs navigation. This section covers the beneficial use of debris from a demolished structure that is eligible for Federal assistance under the Highway Bridge Replacement and Rehabilitation Program under Section 144, Title 23, United States Code. The "beneficial use" is defined as the use of the debris for purposes of shore erosion control or stabilization, ecosystem restoration, and marine habitat creation. AN - dot:92763 DA - 2006-03-07 KW - Policy KW - Recommendations KW - Bridges KW - Overpasses KW - Demolition LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2006 T2 - Memoranda & Guidance: Guidance TI - Use of Debris from Demolished Bridges and Overpasses [Memorandum] M3 - Memorandum N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92763 ER -
Revisions to the Recording and Coding Guide for the Structure, Inventory and Appraisal of the Nation's Bridges (Coding Guide) - Item 31, Design Load, and Items 63 and 65, Method Used to Determine Operating and Inventory Ratings [Memorandum]

Lwin, Maung Myint

2011-02-02 | Memoranda & Guidance: Guidance | PDF

The purpose of this memorandum is to notify your offices that we are revising National Bridge Inventory (NBI) Item 31 - Design Load, Item 63 - Method Used to Determine Operating Rating, and Item 65 - Method Used to Determine Inventory Rating in the Recording and Coding Guide for the Structure, Inventory and Appraisal of the Nation's Bridges, (Codin ...

08/03/2026

Title : Revisions to the Recording and Coding Guide for the Structure, Inventory and Appraisal of the Nation's Bridges (Coding Guide) - Item 31, Design Load, and Items 63 and 65, Method Used to Determine Operating and Inventory Ratings [Memorandum] Creator(s) : Lwin, Maung Myint Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 2011-02-02 Series : Memoranda & Guidance: Guidance URL : https://rosap.ntl.bts.gov/view/dot/92762
Lwin, M. M. (2011). Revisions to the Recording and Coding Guide for the Structure, Inventory and Appraisal of the Nation's Bridges (Coding Guide) - Item 31, Design Load, and Items 63 and 65, Method Used to Determine Operating and Inventory Ratings [Memorandum]. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/92762

Lwin, Maung Myint. Revisions to the Recording and Coding Guide for the Structure, Inventory and Appraisal of the Nation's Bridges (Coding Guide) - Item 31, Design Load, and Items 63 and 65, Method Used to Determine Operating and Inventory Ratings [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 2011. https://rosap.ntl.bts.gov/view/dot/92762.

Lwin, Maung Myint Revisions to the Recording and Coding Guide for the Structure, Inventory and Appraisal of the Nation's Bridges (Coding Guide) - Item 31, Design Load, and Items 63 and 65, Method Used to Determine Operating and Inventory Ratings [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 2011, ROSA P. https://rosap.ntl.bts.gov/view/dot/92762.
Export RIS Citation Information. TY - Memorandum AU - Lwin, Maung Myint A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - The purpose of this memorandum is to notify your offices that we are revising National Bridge Inventory (NBI) Item 31 - Design Load, Item 63 - Method Used to Determine Operating Rating, and Item 65 - Method Used to Determine Inventory Rating in the Recording and Coding Guide for the Structure, Inventory and Appraisal of the Nation's Bridges, (Coding Guide) report number; FHWA-PD-96-001. Attached are the revised NBI Items, which include new and revised codes and additional commentary. AN - dot:92762 DA - 2011-02-02 KW - Bridges KW - Inventory KW - Load factor KW - Bridge engineering KW - Coding systems LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2011 T2 - Memoranda & Guidance: Guidance TI - Revisions to the Recording and Coding Guide for the Structure, Inventory and Appraisal of the Nation's Bridges (Coding Guide) - Item 31, Design Load, and Items 63 and 65, Method Used to Determine Operating and Inventory Ratings [Memorandum] M3 - Memorandum N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92762 ER -
Increasing Asphalt Recycling to Reduce Paving Costs, Improve Pavement Longevity, and Reduce Environmental Impact

Sukhija, Mayank

;

Coleri, Erdem

2026-07-01 | PDF

Recycling highway construction materials and minimizing the use of virgin materials can reduce pavement life cycle costs, improve highway network conditions, conserve natural resources, and protect the environment. Although using recycled asphalt pavements (RAP) is beneficial in many aspects, aged binder in RAP gives rise to failure under repeated ...

08/03/2026

Title : Increasing Asphalt Recycling to Reduce Paving Costs, Improve Pavement Longevity, and Reduce Environmental Impact Creator(s) : Sukhija, Mayank;Coleri, Erdem; Corporate Creator(s) : Oregon State University. School of Civil and Construction Engineering Corporate Contributor(s) : Oregon. Department of Transportation. Research Section;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-07-01 Report Number : FHWA-OR-RD-27-04 URL : https://rosap.ntl.bts.gov/view/dot/92761
Sukhija, M., & Coleri, E. (2026). Increasing Asphalt Recycling to Reduce Paving Costs, Improve Pavement Longevity, and Reduce Environmental Impact (Report No. FHWA-OR-RD-27-04). Oregon. Department of Transportation. Research Section. https://rosap.ntl.bts.gov/view/dot/92761

Sukhija, Mayank and Erdem Coleri. Increasing Asphalt Recycling to Reduce Paving Costs, Improve Pavement Longevity, and Reduce Environmental Impact. Report no. FHWA-OR-RD-27-04. Oregon. Department of Transportation. Research Section, 2026. https://rosap.ntl.bts.gov/view/dot/92761.

Sukhija, Mayank, and Erdem Coleri Increasing Asphalt Recycling to Reduce Paving Costs, Improve Pavement Longevity, and Reduce Environmental Impact. Oregon. Department of Transportation. Research Section, 2026, Report no. FHWA-OR-RD-27-04, ROSA P. https://rosap.ntl.bts.gov/view/dot/92761.
Export RIS Citation Information. TY - Tech Report AU - Sukhija, Mayank AU - Coleri, Erdem A2 - Oregon State University. School of Civil and Construction Engineering A3 - Oregon. Department of Transportation. Research Section A3 - United States. Department of Transportation. Federal Highway Administration AB - Recycling highway construction materials and minimizing the use of virgin materials can reduce pavement life cycle costs, improve highway network conditions, conserve natural resources, and protect the environment. Although using recycled asphalt pavements (RAP) is beneficial in many aspects, aged binder in RAP gives rise to failure under repeated high axle loads and thermal effects. Thus, in Oregon, the use of RAP is currently limited to about 30% by weight of the mix. For asphalt mixtures with a higher percentage of RAP, various strategic measures have been developed, including increased binder content, binder grade bumping, rejuvenators, and warm-mix asphalt (WMA) additives. However, selecting the most effective rejuvenators and WMA technology for Oregon, developing methods and guidelines for choosing the proper amount of additives, and ensuring appropriate mixing to achieve high RAP mixes without compromising the performance of the asphalt pavements is crucial. In addition, practices for better managing the RAP stockpiles at the asphalt plants (including process controls) play an important role in the mix performance and need careful investigation. This research study addressed the above-mentioned concerns through comprehensive experimental and analytical work, including the evaluation of performance, cost, and environmental benefits of using high RAP, incorporating the strategic techniques. The effect of RAP source variability, as well as in-plant variability, has also been studied. Further, the results were confirmed through statistical analysis. Results of the analysis indicate that the performance of RAP mixtures depends on binder content, RAP content, and binder grade. Considering all aspects, the appropriate selection of a strategic technique could enable a 10% higher RAP than the current allowable limit in Oregon, ensuring adequate performance while lowering economic and environmental burdens. AN - dot:92761 DA - 2026-07-01 ET - Final Report KW - Recycled materials KW - Asphalt pavements KW - Rejuvenators KW - Warm mix paving mixtures KW - Rutting KW - Cracking KW - Life cycle costing KW - Life cycle analysis KW - Sustainable development KW - Performance evaluations KW - Environmental impacts LA - English PB - Oregon. Department of Transportation. Research Section PY - 2026 SN - FHWA-OR-RD-27-04 TI - Increasing Asphalt Recycling to Reduce Paving Costs, Improve Pavement Longevity, and Reduce Environmental Impact M3 - Tech Report N1 - United States N1 - SPR 862 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92761 ER -
Guidelines for the Design and Construction of Grade Separation Highway Structures over or under Railroads [Memorandum]

Lwin, Maung Myint

2013-04-16 | Memoranda & Guidance: Information | PDF

This memorandum is intended to clarify Federal Highway Administration's (FHWA's) guidance on the design and construction of grade separated highway structures over or under railroads with regard to horizontal and vertical clearances, and parapets, railings and fencing. Specifically, this memorandum addresses the applicable requirements and funding ...

08/03/2026

Title : Guidelines for the Design and Construction of Grade Separation Highway Structures over or under Railroads [Memorandum] Creator(s) : Lwin, Maung Myint Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Policy & Guidance Center Published Date : 2013-04-16 Series : Memoranda & Guidance: Information URL : https://rosap.ntl.bts.gov/view/dot/92760
Lwin, M. M. (2013). Guidelines for the Design and Construction of Grade Separation Highway Structures over or under Railroads [Memorandum]. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/92760

Lwin, Maung Myint. Guidelines for the Design and Construction of Grade Separation Highway Structures over or under Railroads [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 2013. https://rosap.ntl.bts.gov/view/dot/92760.

Lwin, Maung Myint Guidelines for the Design and Construction of Grade Separation Highway Structures over or under Railroads [Memorandum]. United States. Department of Transportation. Federal Highway Administration, 2013, ROSA P. https://rosap.ntl.bts.gov/view/dot/92760.
Export RIS Citation Information. TY - Memorandum AU - Lwin, Maung Myint A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Policy & Guidance Center AB - This memorandum is intended to clarify Federal Highway Administration's (FHWA's) guidance on the design and construction of grade separated highway structures over or under railroads with regard to horizontal and vertical clearances, and parapets, railings and fencing. Specifically, this memorandum addresses the applicable requirements and funding eligibility of horizontal and vertical clearances selected and the parapets, railings and fencing detailed. In doing so, this memorandum replaces FHWA Memorandum titled Railroad Guidelines for Design and Construction of Grade Separation Underpass and Overhead Structures issued February 21, 2001. AN - dot:92760 DA - 2013-04-16 KW - Railroad grade crossings KW - Highway design KW - Design standards KW - Railroad clearances LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2013 T2 - Memoranda & Guidance: Information TI - Guidelines for the Design and Construction of Grade Separation Highway Structures over or under Railroads [Memorandum] M3 - Memorandum N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92760 ER -

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