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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 101 - 120 of 35811 results
  • NonTraffic Surveillance NonTraffic Crash Injuries and Fatalities 20082015 Analytical Users Manual
    Non-Traffic Surveillance Non-Traffic Crash Injuries and Fatalities 2008-2015 Analytical User’s Manual
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2025-10-01 | PDF
    This is the updated and revised Non-Traffic Surveillance (NTS) Analytical User’s Manual for the period 2008 to 2015.
  • Modified Fiber Reinforced Concrete Repairs for Corroded Steel Beam Ends
    Modified Fiber Reinforced Concrete Repairs for Corroded Steel Beam Ends
    Provines, Jason T. ;
    Sharifi, Mary
    2025-10-01 | PDF
    One common form of costly bridge maintenance is repairing corroded steel beam ends under leaking joints. Recently, the University of Connecticut and the Connecticut Department of Transportation have developed a practical repair strategy in which shear studs are welded to undamaged sections of the corroded steel beam and then ultra-high-performance ...
  • Interstate 64 Pavement Recycling Instrumentation and Monitoring
    Interstate 64 Pavement Recycling Instrumentation and Monitoring
    Ruiz, Carolina Benavides ;
    Flintsch, Gerardo W.
    2025-10-01 | PDF
    During the past two decades, the implementation of pavement recycling techniques, such as cold central plant recycling and full-depth reclamation, for pavement rehabilitation and construction in the United States has been driven by positive performance and the opportunity for significant cost and environmental savings. However, these recycling tech ...
  • Evaluating the Potential Use of Traffic Speed Deflection DeviceBased Pavement Structural Data for Asphalt Pavements in VDOTs Pavement Management Processes
    Evaluating the Potential Use of Traffic Speed Deflection Device-Based Pavement Structural Data for Asphalt Pavements in VDOT’s Pavement Management Processes
    Katicha, Samer W. ;
    Flintsch, Gerardo W.
    2025-10-01 | PDF
    This report describes the evaluation of a proposed approach to incorporate structural condition information obtained from a traffic speed deflection device into the Virginia Department of Transportation (VDOT) pavement management system’s pavement treatment selection process for asphalt pavement sections, which are denoted within the VDOT pavement ...
  • A FollowUp Evaluation of the Concrete Pavements US 58 Rehabilitated in 2012
    A Follow-Up Evaluation of the Concrete Pavements (U.S. 58) Rehabilitated in 2012
    Hossain, M. Shabbir ;
    Ozyildirim, Celik
    2025-10-01 | PDF
    The Virginia Department of Transportation usually rehabilitates old concrete pavements with an asphalt overlay, making them composite pavements. In 2012, a portion of U.S. Route 58 west in Southampton, Virginia, received two additional treatment options: a bonded concrete overlay and an unbonded concrete overlay. Around the same time, the eastbound ...
  • Safety Effectiveness of Inside Shoulder Widths on Freeways in Georgia
    Safety Effectiveness of Inside Shoulder Widths on Freeways in Georgia
    Liu, Jun ;
    Su, Yanfang
    2025-10-01 | PDF
    This report presents a comprehensive analysis of the safety effectiveness of inside (left) shoulder widths on Georgia freeways, conducted as part of Georgia Department of Transportation (GDOT) Research Project 23-22. The study integrates six years (2018–2023) of traffic crash data, traffic volume data (annual average daily traffic [AADT] and truck ...
  • Digital Delivery Roadmap for Implementing Building Information Model BIM for Infrastructure at GDOT
    Digital Delivery: Roadmap for Implementing Building Information Model (BIM) for Infrastructure at GDOT
    Ashuri, Baabak ;
    Lee, SeungYeon
    2025-10-01 | PDF
    As transportation agencies transition toward more data-driven and collaborative project delivery, the Georgia Department of Transportation (GDOT) has initiated a strategic effort to define and implement digital delivery. This research develops a comprehensive roadmap for GDOT based on an integrated methodology that combines internal interviews, a s ...
  • Systematic and Quantitative Approaches to Assess the Probability of Extreme Weather and Resilience Risks for TxDOT Highways and Bridges
    Systematic and Quantitative Approaches to Assess the Probability of Extreme Weather and Resilience Risks for TxDOT Highways and Bridges
    Birt, Andrew ;
    Prozzi, Jorge
    2025-10-01 | PDF
    This research develops a quantitative framework to assess flood-related risks and resilience for Texas highways and bridges. The study reviewed current practices and gaps, applied GIS-based methods with statewide flood datasets, and evaluated exposure of pavements and bridges across multiple return periods and climate scenarios. Risk assessments qu ...
  • Traffic Safety Facts 2023 Data Summary of Motor Vehicle Traffic Crashes
    Traffic Safety Facts 2023 Data: Summary of Motor Vehicle Traffic Crashes
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2025-10-01 | PDF
    This issue of Traffic Safety Facts presents the most current data on motor vehicle crashes. In 2023 there were an estimated 6,138,359 police-reported traffic crashes when 40,901 people were killed and an estimated 2,442,581 people were injured. Compared to 2022, there was a 4.3-percent decrease in the number of fatalities, and a 2.5-percent increas ...
  • Evaluation of Structural Fillers for Steel Grouting in Steel Bridge Preventive Maintenance and Repairs
    Evaluation of Structural Fillers for “Steel Grouting” in Steel Bridge Preventive Maintenance and Repairs
    Provines, Jason T. ;
    Starr, Joshua
    2025-10-01 | PDF
    In some instances, steel bridges can contain gaps between steel plates in bolted connections or between steel and concrete surfaces. In new bridges, these gaps may result from fabrication or assembly errors. In existing structures, the gaps often arise because of corrosion-related section loss. These gaps can also cause durability concerns because ...
  • Seat Belt Use in 2024 Overall Results Traffic Safety Facts Research Note
    Seat Belt Use in 2024 – Overall Results [Traffic Safety Facts - Research Note]
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2025-10-01 | PDF
    This Research Note briefly summarizes seat belt use in 2024. The national estimate of seat belt use by adult front-seat passengers of passenger vehicles in 2024 was 91.2 percent, nearly the same as the 91.9 percent observed in 2023. The seat belt use rate estimate represents the percentage of occupants who are belted during an average daylight mome ...
  • NondestructiveNoncontact Inspection Protocols and Technologies for Aging Mechanically Stabilized Earth and Modular Block Retaining Walls Volume II
    Nondestructive/Noncontact Inspection Protocols and Technologies for Aging Mechanically Stabilized Earth and Modular Block Retaining Walls, Volume II
    Maghiar, Marcel ;
    Maldonado, Gustavo O.
    2025-10-01 | PDF
    This volume is the second in a series. The other volume in the series is FHWA-GA-25-2217 Volume I. As Mechanically Stabilized Earth and Modular Block retaining walls age within Georgia's highway infrastructure, their stability and safety are critical concerns. Currently, unlike bridges, these retaining walls lack standardized inspection protocols, ...
  • Evaluation of Electronic Stability Control FMVSS No 126 an Update
    Evaluation of Electronic Stability Control: FMVSS No. 126, an Update
    Webb, Caitlin N
    2025-10-01 | PDF
    This report evaluates the effectiveness of electronic stability control (ESC) in mitigating single-vehicle, first-event rollover crashes. NHTSA mandated ESC standard equipment in certain light vehicles manufactured on or after September 1, 2011, by Federal Motor Vehicle Safety Standard (FMVSS) No.126, Electronic stability control systems. The study ...
  • Update on Evaluating the Magnitude and Time Rate of Consolidation Settlement of Embankments and Other Piezocone Penetration Tests PCPT Project Capsule
    Update on Evaluating the Magnitude and Time Rate of Consolidation Settlement of Embankments and Other Piezocone Penetration Tests (PCPT) [Project Capsule]
    Abu-Farsakh, Murad Y.
    2025-10-01 | PDF
    The construction of embankments and other infrastructure elements over saturated, compressible, cohesive soft soils in Louisiana presents significant geotechnical design challenges due to anticipated large magnitudes of consolidation settlement and slow rates of consolidation. Inaccurate estimation of these deformations can lead to significant diff ...
  • NondestructiveNoncontact Inspection Protocols and Technologies for Aging Mechanically Stabilized Earth and Modular Block Retaining Walls Volume I
    Nondestructive/Noncontact Inspection Protocols and Technologies for Aging Mechanically Stabilized Earth and Modular Block Retaining Walls, Volume I
    Maghiar, Marcel ;
    Maldonado, Gustavo O.
    2025-10-01 | PDF
    This volume is the first in a series. The other volume in the series is FHWA-GA-25-2217 Volume II. As Mechanically Stabilized Earth and Modular Block retaining walls age within Georgia's highway infrastructure, their stability and safety are critical concerns. Currently, unlike bridges, these retaining walls lack standardized inspection protocols, ...
  • Effectiveness of MagnesiumAluminoLiquid PhosphateBased Concrete as a Repair Material
    Effectiveness of Magnesium-Alumino-Liquid Phosphate-Based Concrete as a Repair Material
    Darwin, David ;
    O’Reilly, Matthew
    2025-10-01 | PDF
    A proprietary magnesium-alumino-liquid-phosphate (MALP) concrete, manufactured by Phoscrete Corporation, is a rapid-setting repair material promoted for its ability to bond with portland cement concrete and protect reinforcing steel against corrosion. A related product, magnesium-potassium-phosphate (MKP) concrete, offers slower setting for easier ...
  • Assessing Transportation Infrastructure Risk
    Assessing Transportation Infrastructure Risk
    Yang, David ;
    Khosravifar, Arash
    2025-10-01 | PDF
    A report by Portland State University (PSU) researchers offers an improved framework for assessing the seismic risk of transportation structures. Earthquake preparedness is a high priority for the Pacific Northwest, and cities and state agencies will benefit from having a more accurate and consistent way to prepare.
  • Scaling Matching and Variability Effects of Ground Motion Selection in Performance Uncertainty
    Scaling, Matching, and Variability: Effects of Ground Motion Selection in Performance Uncertainty
    Yang, Ya-Heng ;
    Becker, Tracy C.
    2025-10-01 | PDF
    The selection of ground motions for time series analysis of structures remains a topic of considerable debate. While both time domain method and spectral matching are permitted by the Caltrans Seismic Design Criteria (SDC), the implications of the choice are not fully understood. To explore and compare how these different modification methodologies ...
  • Bringing Montanas History into the Future Modernizing MDTs Interpretive Marker System
    Bringing Montana’s History into the Future: Modernizing MDT’s Interpretive Marker System
    Villwock-Witte, Natalie ;
    Clouser, Karalyn
    2025-10-01 | PDF
    The Montana Department of Transportation currently administers 295 interpretive markers along the state’s primary and secondary roads and in rest areas along interstates. Historically, travelers could stop to read the interpretive markers. Then, printable guidebooks were created, with some agencies still using these today. With contemporary technol ...
  • 2025 Bringing Montanas History into the Future Modernizing MDTs Interpretive Marker System Data Management Plan
    2025 Bringing Montana’s History into the Future: Modernizing MDT’s Interpretive Marker System Data Management Plan
    Villwock-Witte, Natalie ;
    Clouser, Karalyn
    2025-10-01 | PDF
    Tabular and text data from fewer than 50 respondents were collected. The survey data was then exported from Qualtrics in CSV format. Forty-nine survey responses were then recorded in an Excel Spreadsheet, as Excel is a readily accessible file format for most users. The file size is 40 KB of data. No information about the respondents' names were inc ...
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