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US Transportation Collection

rosaP Repository & Open Science Access Portal

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 35753 results
  • 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 ...
  • 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 ...
  • Equity in Transportation Payments A Study for the California Department of Transportation
    Equity in Transportation Payments: A Study for the California Department of Transportation
    Mata, Stacy ;
    Hamilton, Madi
    2025-10-01 | PDF
    This study identifies equity challenges in current transportation payment systems, specifically for transit, parking, and vehicle tolls. The methodology included comprehensive literature reviews, an inventory of 49 global transit systems, seven case studies, and expert interviews to assess payment accessibility, technical rules, interoperability, a ...
  • 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.
  • Using Infrastructure to Boost Safety in a PNT World Balancing Reliability Overreliance Malfunction Risks and Cybersecurity to Improve Intersection Safety
    Using Infrastructure to Boost Safety in a PNT World: Balancing Reliability, Overreliance, Malfunction Risks, and Cybersecurity to Improve Intersection Safety
    Haddad, Angela J. ;
    Bhat, Chandra R.
    2025-09-30 | PDF
    Cooperative perception broadens the sensing range of an automated vehicle, especially in urban settings where other road users and infrastructure create occlusions. However, it raises safety concerns because received information can be incorrect due to faults or malicious attacks, which can lead to unsafe planning. We study object-level fusion stra ...
  • Capacity Prediction of Repaired and Unrepaired Bridge Beams with Deteriorated Ends
    Capacity Prediction of Repaired and Unrepaired Bridge Beams with Deteriorated Ends
    Attanayake, Upul ;
    Bhowmik, Sanjoy
    2025-09-30 | PDF
    The Michigan Department of Transportation (MDOT) identified significant deterioration at the ends of steel and prestressed concrete (PSC) beams, requiring systematic evaluation and improved decision-making protocols for Requests for Action (RFAs). This comprehensive study examined 431 steel beam ends and 267 PSC bridges to develop capacity-based as ...
  • Distributed Fiber Optic Sensing System for Bridge Monitoring
    Distributed Fiber Optic Sensing System for Bridge Monitoring
    Wang, Xingwei ;
    Yu, Tzuyang
    2025-09-30 | PDF
    The deterioration of infrastructure presents a major challenge for the economy of any country. Additionally, the risk factor of possible loss of life has made Structural Health Monitoring (SHM) an important approach to evaluate the status of any civil infrastructure. Among different methods, Fiber Optics Sensors have shown great potential to comple ...
  • Electromagnetic Detection and Identification of Concrete Cracking in Highway Bridges
    Electromagnetic Detection and Identification of Concrete Cracking in Highway Bridges
    Yu, Tzuyang
    2025-09-30 | PDF
    The primary focus of our research is to address the challenge of evaluating aging concrete bridges, both reinforced and prestressed, located in New England. We have developed a remote radar sensor capable of characterizing corroded reinforced concrete structures, as well as a predictive capability to generate artificial cracks and simulate radar im ...
  • Slope Restoration on Urban Freeways
    Slope Restoration on Urban Freeways
    Cregg, Bert M.
    ORCID ICON IMG
    2025-09-30 | PDF
    Improving the diversity of roadside plantings can provide an array of benefits including improved aesthetics, improved driver safety, and increased biodiversity. However, establishing landscape plants along roadsides can often be difficult due to a variety of soil related and other environmental factors. In an earlier trial, researchers from Michig ...
  • 319 Detection and Monitoring of Material Aging and Structural Deterioration Using Electromagnetic and Mechanical Sensors with Virtual Reality and Machine Learning Modeling
    3.19 Detection and Monitoring of Material Aging and Structural Deterioration Using Electromagnetic and Mechanical Sensors with Virtual Reality and Machine Learning Modeling
    Yu, Tzuyang ;
    Wei, Jianqiang
    2025-09-30 | PDF
    The research problem we are trying to solve is the detection and monitoring of aging civil infrastructure components and systems in New England by using visual information and subsurface images in a virtual reality (VR) environment for data visualization and machine learning (ML) for data interpretation. The overall research objective is to study t ...
  • Project Governance Best Practices for When State DOTs Deliver Transit Projects
    Project Governance & Best Practices for When State DOTs Deliver Transit Projects
    Nepstad, Jon ;
    Henneman, Jack
    2025-09-26 | PDF
    This research project explores the consequences of Utah H.B.322, passed by the Utah legislature in 2022. The research includes a synopsis of the bill that relates to delivery of fixed guideway projects. It includes national peer agency research to explore if there are similar mandated arrangements around the US. Last, the research conducted one-on- ...
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