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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 3061 - 3080 of 35959 results
  • Geosynthetic Reinforced Soils for Bridge Approach Slab Support
    Geosynthetic Reinforced Soils for Bridge Approach Slab Support
    Alshibli, Khalid A ;
    Imseeh, Wadi H
    2021-11-01 | PDF
    Two approach slabs are constructed at bridge ends to serve as a smooth transition from the highway pavement to the bridge deck. Motorists usually complain about a sudden change in elevation (bump) at the highway/approach slab (H/S) joint that causes a potential hazard for public safety, damage to vehicles, and riders’ discomfort. Many US States con ...
  • Design MythBusters
    Design MythBusters
    Van Dyke, Chris ;
    Waddle, Steven
    2021-11-01 | PDF
    When highway project designs depart from design values found in the Kentucky Transportation Cabinet (KYTC) Highway Design Manual and AASHTO’s A Policy on Geometric Design of Highways and Streets, project managers at the agency must obtain either a design exception or design variance. While designers are more comfortable with exceptions and variance ...
  • Optimized Adhesive Performance in Electronic Transportation Sign Construction
    Optimized Adhesive Performance in Electronic Transportation Sign Construction
    Seo, Junwon ;
    Amatya, Ibin
    2021-11-01 | PDF
    The ultimate objective of this project was to determine the structural performance of the dynamic message sign (DMS) bonded with chemical adhesive in terms of ultimate strength and fatigue strength. To achieve this objective, this project first investigated the effects of various parameters (i.e., conditioning humidity and conditioning temperature) ...
  • Evaluation of Tapered Bridge Bearing Pads Summary
    Evaluation of Tapered Bridge Bearing Pads [Summary]
    Freeman, Christina ;
    Consolazio, Gary
    2021-11-01 | PDF
    University of Florida researchers conducted experiments to evaluate tapered bearing pads for use in Florida bridge construction. The researchers found limited research on important design properties of tapered bearing pads such as axial stiffness, shear stiffness, horizontal restraining force and displacement generated in tapered pads under pure co ...
  • Noise ModeltoMonitor Case Study
    Noise Model-to-Monitor Case Study
    Sperry, Benjamin R. ;
    Destocki, Devon
    2021-11-01 | PDF
    The Ohio Department of Transportation (ODOT) noise program includes an inventory of more than 250 miles of noise barriers around the state. Each noise barrier constructed must be analyzed using the Federal Highway Administration (FHWA) Traffic Noise Model (TNM) software program to determine if the construction of the barrier is justified. This rese ...
  • Texas Culvert and Bridge Deterioration Models Implementation Manual
    Texas Culvert and Bridge Deterioration Models: Implementation Manual
    Weissmann, José ;
    Weissmann, Angela Jannini
    2021-11-01 | PDF
    This report consists of a manual to be used in conjunction with Product 0-6979-P2, a set of 9 Excel workbooks that contain implemented bridge and culvert deterioration models. NBI/PonTex data items modeled were: Item 58, Deck Rating (11 models), Item 59, Superstructure Rating (17 models) Item 60, Substructure Rating (10 models) and Item 62, Culvert ...
  • Use of Geocell in Pavement Design Final Report
    Use of Geocell in Pavement Design: Final Report
    Inti, Sundeep ;
    Tirado, Cesar
    2021-11-01 | PDF
    This study focused on identifying mechanisms responsible for improved bearing capacity and benefits derived from geocell. The study performed Finite Element Analyses (FEA) and verified the results by performing laboratory tests. In addition, the study developed a design system and performed Life Cycle Cost Analysis to identify the benefits of geoce ...
  • Evaluation of Road Weather Messages on DMS Based on Roadside Pavement Sensors
    Evaluation of Road Weather Messages on DMS Based on Roadside Pavement Sensors
    Knickerbocker, Skylar ;
    Sassani, Alireza
    2021-11-01 | PDF
    Winter weather and its corresponding surface conditions impact the safety and mobility of thousands of motorists annually. Highway agencies spend millions of dollars in resources and personnel in an effort to ensure safe and efficient travel. One such strategy is to use dynamic message signs (DMS) that have been deployed across the state to alert d ...
  • Improved Disaster Management Through Automated Damage Assessment Using Unmanned Aerial Vehicles UAVs
    Improved Disaster Management Through Automated Damage Assessment Using Unmanned Aerial Vehicles (UAVs)
    Haddad, Rami J ;
    Gonzalez Bocanegra, Maria
    2021-11-01 | PDF
    Natural disasters cause devastating effects on transportation networks by causing significant damage and obstruction on frequently traveled roads. This report describes the design and implementation of an automated Unmanned Aerial Vehicle (UAV) based damage management using convolutional neural networks (CNNs). This system utilizes image processing ...
  • SC Flood Inundation Mapping Project
    SC Flood Inundation Mapping Project
    Lamm, Maria Cox
    2021-11-01 | PDF
    SC Flood Inundation and Mapping for Action (IMPACT) reduces the stress from uncertainty of flood events by instantly and visually communicating forecasted flooding to state agencies and the public. SC Flood IMPACT analyzes multiple data sources to provide flooding forecasts including peak flow, water surface elevations, time, inundation extents, an ...
  • Connected Automated Vehicle Working Group Strategic Plan
    Connected & Automated Vehicle Working Group Strategic Plan
    Grosso, Rachel ;
    Dougherty, Claire
    2021-11-01 | PDF
    Rapidly evolving technology is changing the how and why of travel. The Alaska Department of Transportation and Public Facilities (DOT&PF) is preparing for these changes by developing a Connected and Automated Vehicle (CAV) Strategic Plan for the established Working Group, made up of stakeholders across Alaska. The CAV Strategic Plan centers on the ...
  • Mobile Device Data Analytics for NextGeneration Traffic Management
    Mobile Device Data Analytics for Next-Generation Traffic Management
    Macfarlane, Jane ;
    Patire, Anthony
    2021-11-01 | PDF
    Quality data is critically important for research and policy-making. The availability of device location data carrying rich, detailed information on travel patterns has increased significantly in recent years with the proliferation of personal global positioning system (GPS)-enabled mobile devices and fleet transponders. However, in its raw form, l ...
  • Ohios Research Initiative for Locals ORIL Research OnCall 2021ORIL6 Task 3 Asset Management Practices by Ohio Local Public Agencies
    Ohio’s Research Initiative for Locals (ORIL) Research On-Call 2021-ORIL6 (Task 3) – Asset Management Practices by Ohio Local Public Agencies
    Abbas, Ala R. ;
    Pearson, Sheila
    2021-11-01 | PDF
    This Research-on-Call (ROC) task was initiated by the Ohio’s Research Initiative for Locals (ORIL) program to obtain information on the current state-of-practice for transportation asset management by local public agencies (LPAs) in Ohio. An online survey was conducted in this task to collect information from Ohio LPAs regarding their asset managem ...
  • Accelerated Pavement Construction Evaluation Procedures
    Accelerated Pavement Construction Evaluation Procedures
    Goehl, Darlene C ;
    Choi, Kunhee
    2021-11-01 | PDF
    The researchers investigated innovative tools and techniques that accelerate the construction of roadway improvement projects. In coordination with local Texas Department of Transportation (TxDOT) districts, the researchers identified four major roadway improvement projects and performed case studies using innovative tools and techniques to acceler ...
  • Estimating Switching Times of Actuated Coordinated Traffic Signals A Deep Learning Approach
    Estimating Switching Times of Actuated Coordinated Traffic Signals: A Deep Learning Approach
    Eteifa, Seifeldeen ;
    Rakha, Hesham A.
    2021-11-01 | PDF
    Acceleration and deceleration maneuvers at signalized intersections are a major hindrance to fuel-efficient vehicle operations. Green Light Optimal Speed Advisory (GLOSA) allows for the control of vehicles in a fuel-efficient manner but requires reliable estimates of signal switching times. This study attempts to utilize data from actuated coordina ...
  • Dynamic Routing for RideSharing
    Dynamic Routing for Ride-Sharing
    Dessouky, Maged M. ;
    Hu, Shichun
    2021-11-01 | PDF
    The research report explored the use of High Occupancy Vehicle (HOV) lanes and meeting points in a ride-sharing system where drivers have their own origin and destination. A two-stage heuristic algorithm is proposed, which consists of an insertion heuristic to solve the pickup and delivery problem (PDP) problem and a second stage algorithm that can ...
  • North Texas Bicycle and Pedestrian Crash Analysis Final Report
    North Texas Bicycle and Pedestrian Crash Analysis: Final Report
    Vavrova, Marketa ;
    Chang, Carlos M.
    2021-11-01 | PDF
    The scope of this project involves a holistic investigation of the causes of pedestrian and bicycle crashes in the 12-county North Central Texas area. An extensive review of literature assesses the state-of-art knowledge in crash reporting and analysis, safety countermeasures, safety target setting, as well as crash databases and tools. Five years ...
  • Assessment of Existing and Potential Volume Reduction for Post Construction Stormwater Management
    Assessment of Existing and Potential Volume Reduction for Post Construction Stormwater Management
    Tangirala, Anil ;
    Kerns, Justin
    2021-11-01 | PDF
    The Assessment of Existing and Potential Volume Reduction for Post Construction Stormwater Management research project focuses on developing additional options for post construction BMPs available to ODOT projects. Real-time flow monitoring equipment was installed along ODOT roadways to measure stormwater runoff across the state of Ohio. This resul ...
  • Panel Study of Emerging Transportation Technologies and Trends in California Phase 2 Findings
    Panel Study of Emerging Transportation Technologies and Trends in California: Phase 2 Findings
    Circella, Giovanni ;
    Iogansen, Xiatian
    2021-11-01 | PDF
    Emerging transportation services, whose development and adoption have been enabled by information and communication technology, are largely transforming people’s travel and activity patterns. This study investigates the emerging transportation trends and how they transform travel-related decision-making in the population at large through the applic ...
  • Track Surface Irregularity Position Localization With SmartphoneBased Solution
    Track Surface Irregularity Position Localization With Smartphone-Based Solution
    Lu, Pan ;
    Bridgelall, Raj
    2021-11-01 | PDF
    Tracks are a critical and expensive railroad asset, requiring frequent maintenance. Railroads companies often rely on the accurate localization and identification of the track anomalies that could cause serious damage to infrastructure, environment, and the traveling public. However, the deployed method of inspection and maintenance is expensive, s ...
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