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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 41 - 60 of 36022 results
  • Linking Oregon Driver Records and Crash Data to Evaluate Interventions and Mitigate Driver Risk
    Linking Oregon Driver Records and Crash Data to Evaluate Interventions and Mitigate Driver Risk
    Hurwitz, David ;
    Jashami, Hisham
    2026-02-01 | PDF
    ODOT seeks to reduce the number of risky drivers on the road through driver improvement programs, but the efficacy of these programs are rarely assessed. This report details the methodology for creating a linked database combining driver, verdict, accident, and crash data from ODOT to evaluate program performance and trends in risky driver behavior ...
  • Special Crash Investigations OnSite Rollover Crash Investigation Vehicle 2018 Jeep Compass Location California Crash Date January 2022
    Special Crash Investigations: On-Site Rollover Crash Investigation; Vehicle: 2018 Jeep Compass; Location: California; Crash Date: January 2022
    Dynamic Science, Inc.
    2026-02-01 | PDF
    This Special Crash Investigations report documents the investigation of a two-vehicle crash and rollover in California in January 2022 of a stolen 2018 Jeep Compass driven by an unbelted 32-year-old male with a passenger, an unbelted 25-year-old female. The other vehicle was a 2019 Lexus ES300H driven by a belted 61-year-old male with a front right ...
  • Special Crash Investigations OnSite HeavyTruck Underride Crash Investigation Vehicle 2017 International ProStar LF687 Truck Tractor Location California Crash Date December 2022
    Special Crash Investigations: On-Site Heavy-Truck Underride Crash Investigation; Vehicle: 2017 International ProStar LF687 Truck Tractor; Location: California; Crash Date: December 2022
    Dynamic Science, Inc.
    2026-02-01 | PDF
    This Special Crash Investigations report documents the remote investigation of a fatal heavy truck underride crash of a 2017 International ProStar LF687 truck tractor pulling a 2010 Hyundai trailer in California in December 2022. The crash occurred when the tractor-trailer was making a lefthand turn and was struck by a 2002 Ford Mustang with two ad ...
  • Project Consultant Support for IC and PMTP Projects in 20242025
    Project Consultant Support for IC and PMTP Projects in 2024-2025
    Chang, George K. ;
    Gilliland, Amanda
    2026-02-01 | PDF
    The 2024 MoDOT IC-PMTP Annual Report highlights achievements and challenges in implementing Intelligent Compaction (IC) and Paver-Mounted Thermal Profiling (PMTP) technologies. Key updates included aligning data validation tools with updated PMTP specifications and addressing challenges such as contractor’s paving boundary data manipulation and dat ...
  • Use of Small UAVs for Field Measurement of Hydraulic Parameters in Small Drainage Basins
    Use of Small UAVs for Field Measurement of Hydraulic Parameters in Small Drainage Basins
    Do, Jitae ;
    Wang, Binbin
    2026-02-01 | PDF
    This project evaluated the feasibility, accuracy, and practical use of small unmanned aerial vehicles (UAVs) for measuring hydraulic parameters, water-surface elevation (WSE), surface velocity, bathymetry, and discharge, in small to medium Missouri drainage basins. UAV-based measurements offer non-contact alternative to traditional field methods in ...
  • Use of Small UAVs for Field Measurement of Hydraulic Parameters in Small Drainage Basins Summary
    Use of Small UAVs for Field Measurement of Hydraulic Parameters in Small Drainage Basins [Summary]
    Do, Jitae ;
    Wang, Binbin
    2026-02-01 | PDF
    This project evaluated the feasibility, accuracy, and practical use of small unmanned aerial vehicles (UAVs) for measuring hydraulic parameters, water-surface elevation (WSE), surface velocity, bathymetry, and discharge, in small to medium Missouri drainage basins. UAV-based measurements offer non-contact alternative to traditional field methods in ...
  • Evaluation of Rolled Erosion Control Products and Seed Mixes for Vegetation Establishment on Slopes
    Evaluation of Rolled Erosion Control Products and Seed Mixes for Vegetation Establishment on Slopes
    Donaldson, Bridget M. ;
    Rossetti, Maria S.
    2026-01-01 | PDF
    Because transportation construction projects often result in steep slopes with disturbed, bare soils that are sensitive to runoff and erosion processes, vegetation establishment is a continual challenge for transportation departments. The Virginia Department of Transportation (VDOT) regularly uses rolled erosion control products (RECPs) to mitigate ...
  • Development of Equipment Rental Schedule for Illinois
    Development of Equipment Rental Schedule for Illinois
    Bian, Zheyong ;
    Dong, Zhijie
    2026-01-01 | PDF
    During highway construction, the Illinois Department of Transportation (IDOT) resident engineer commonly adds “extra work” to the contract as needed for satisfactory completion of the project. One of the formats for contractor reimbursement requires establishing an hourly compensation rate for contractor-owned equipment used to perform the extra wo ...
  • AIA Recommendations for Ultrasound Inspection of New Make Turbine Engine LifeLimited Rotating Parts
    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 ...
  • An Analysis of VDOTs Sight Distance Requirements Relative to ContextSensitive Designs
    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 ...
  • Evaluation of Critical Shear Strength of Soils in Nebraska Based on Revised CPT
    Evaluation of Critical Shear Strength of Soils in Nebraska Based on Revised CPT
    Song, Chung R. ;
    Al-Nimri, Bashar
    2026-01-01 | PDF
    This study evaluated the “Fully Softened Shear Strength (FSSS)” of soils in Nebraska based on a revised Cone Penetration Test(CPT) method. FSSS is a unique strength condition that soils show substantially reduced strength during rainy seasons, eventually causing failure of slopes and other structures. The revised CPT was adapted to inject water at ...
  • Development and Evaluation of Crashworthy Approach Guardrail Transition with Increased Span Length Between Concrete Bridge Rail and First Transition Post Phase I
    Development and Evaluation of Crashworthy Approach Guardrail Transition with Increased Span Length Between Concrete Bridge Rail and First Transition Post – Phase I
    Yosef, Tewodros Y. ;
    Alomari, Qusai A.
    2026-01-01 | PDF
    This study developed and evaluated a 34-in.-tall Nebraska Department of Transportation (NDOT) thrie-beam approach guardrail transition (AGT) with an increased span between the concrete buttress end and the first transition post. The objective was to accommodate a wide range of common obstructions near bridge ends, including abutments, wing walls, d ...
  • The Use of Recycled Plastic in Asphalt Pavements Feasibility Study
    The Use of Recycled Plastic in Asphalt Pavements: Feasibility Study
    Bueno, Isabella M. ;
    Teixeira, Jamilla E. S. L.
    2026-01-01 | PDF
    The plastics industry has been actively exploring new end-market opportunities for the more than 35 million tons of waste plastics generated annually. The use of recycled WP in asphalt presents an opportunity to improve pavement performance while reducing the growing amount of WP being landfilled or released into the environment. However, the use o ...
  • Quantifying Maritime Chokepoint Disruptions Using AIS Data A PostEvent Impact Measurement Framework for Networked Transportation Systems
    Quantifying Maritime Chokepoint Disruptions Using AIS Data: A Post-Event Impact Measurement Framework for Networked Transportation Systems
    Im, Yunseop
    2026-01-01 | PDF
    This document records an analytical review of a post-event measurement approach applied to major maritime chokepoint disruptions using AIS vessel presence data. The purpose of the work is limited in scope. It is intended to support after-action assessment and comparison of disruption effects once abnormal operating conditions have already materiali ...
  • Developing a Pedestrian Safety Performance Function for Oregon
    Developing a Pedestrian Safety Performance Function for Oregon
    Roll, Josh ;
    Anderson, Jason
    2026-01-01 | PDF
    This report details the development of a pedestrian safety performance function (SPF) for intersections in urban areas in the state of Oregon. The report documents the process to develop SPFs for pedestrian crashes including the process to develop the data for analysis. A key innovation of this work is the use of pedestrian traffic volume estimates ...
  • Developing Sight Distance Guidelines for UTurn Maneuvers
    Developing Sight Distance Guidelines for U-Turn Maneuvers
    Tsai, Yichang (James) ;
    Agnihotri, Atharv
    2026-01-01 | PDF
    This project, conducted by the Georgia Tech research team in collaboration with the Georgia Department of Transportation (GDOT), aims to develop safe and practical U-turn sight distance (UTSD) guidelines for Reduced Conflict U-turn (RCUT) intersections. The research analyzed video footage from GDOT to quantify U-turn maneuver times under varying me ...
  • Computational Fluid Dynamics Investigation of High Mast Illumination Poles Influence of Light Fixtures Technical Summary
    Computational Fluid Dynamics Investigation of High Mast Illumination Poles: Influence of Light Fixtures [Technical Summary]
    Junge, Briceson ;
    Bennett, Caroline
    2026-01-01 | PDF
    The objective of this study was to determine the influence of luminaire type on the susceptibility of HMIPs to vortex shedding using a computational fluid dynamics (CFD) modeling approach. Two types of luminaires were considered: LED and incandescent fixtures. The number of light fixtures was varied, along with orientation of the fixtures with resp ...
  • Cold InPlace Recycle CIR and FullDepth Reclamation FDR in Arizona
    Cold In-Place Recycle (CIR) and Full-Depth Reclamation (FDR) in Arizona
    Mamlouk, Michael S. ;
    Aker, Saed
    2026-01-01 | PDF
    The primary goal of this study was to develop guidance materials for the Arizona Department of Transportation's (ADOT’s) consideration for the adoption and implementation of CIR and FDR technologies. The first objective in accomplishing this goal was to summarize the current state of the practice on the key engineering factors that could contribute ...
  • Development of Adjustment Factors and Load Ratings via Statistical Analyses of the National Bridge Inventory Database Technical Summary
    Development of Adjustment Factors and Load Ratings via Statistical Analyses of the National Bridge Inventory Database [Technical Summary]
    McVey, Isaac ;
    Husic, Admin
    2026-01-01 | PDF
    The primary objective of this study was to develop and evaluate a statistical model using the National Bridge Inventory (NBI) database to establish baseline load ratings for bridges in Kansas. A linear regression model was used to identify key variables, such as age and bridge condition, that correlate with recorded inventory and operating load rat ...
  • Computational Fluid Dynamics Investigation of High Mast Illumination Poles Influence of Light Fixtures
    Computational Fluid Dynamics Investigation of High Mast Illumination Poles: Influence of Light Fixtures
    Junge, Briceson ;
    Bennett, Caroline
    2026-01-01 | PDF
    High Mast Illumination Poles (HMIPs) are lighting towers that are taller than 55 ft (16.8 m) and are typically located along highways and rest stops. In March 2019, a wind event, referred to as a “bomb cyclone,” caused several HMIPs in Kansas to excite and experience large-amplitude deflections on the order of several feet called “lock-in” behavior ...
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