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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 35438 results
  • 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 ...
  • 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, ...
  • 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, ...
  • Reimagining Transportation as a Social Service to Build Resilience and Support Community Power
    Reimagining Transportation as a Social Service to Build Resilience and Support Community Power
    Pearce, Jeannine Marie ;
    Borowski, Elisa
    2025-10-01 | PDF
    This study develops guidance for public transit agencies in Los Angeles, California to better prepare for hazards and address challenges, including climate and safety concerns. Using a community-based participatory research methodology in partnership with the local non-profit organization Climate Resolve, we conducted three listening sessions with ...
  • Field and Lab Evaluation of Compacted Concrete Pavement Mixtures
    Field and Lab Evaluation of Compacted Concrete Pavement Mixtures
    Roesler, Jeffery ;
    Ouellet, Jordan
    2025-10-01 | PDF
    This research evaluated compacted concrete pavement (CCP) constructed on a local road in Jerseyville, Illinois, and developed a future CCP mix based on a recently proposed roller-compacted concrete (RCC) mix design process using a gyratory compactor. The Jerseyville evaluation provided valuable insights into the batching, hauling, paving, compactin ...
  • Phase II High Resolution Digital Elevation Models DEMs and StreetLevel Imagery for Rock Cut Slope Inventory and Rockfall Hazard Rating
    Phase II: High Resolution Digital Elevation Models (DEMs) and Street-Level Imagery for Rock Cut Slope Inventory and Rockfall Hazard Rating
    Admassu, Yonathan
    2025-10-01 | PDF
    Proactive management of geotechnical assets such as rock cut slopes along highways includes performing inventory and evaluating rockfall hazard ratings. Both activities are aimed at helping transportation agencies to proactively monitor and maintain rockfall prone rock cut slopes. Rock cut slope inventory involves locating rock cut slopes and colle ...
  • Incident Management in Interstate Work Zones
    Incident Management in Interstate Work Zones
    Cottrell Jr Benjamin H.
    2025-10-01 | PDF
    Incidents in interstate work zones can create challenges for incident management, especially when temporary traffic barriers and limited shoulder pull-off areas are present. This project identified best practices for incident management in interstate work zones, including strategies to provide for the detection, response, and clearance of incidents ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Utilizing Connected Vehicle Data to Identify Impacts of Congestion on Adjacent Agencies
    Utilizing Connected Vehicle Data to Identify Impacts of Congestion on Adjacent Agencies
    Driscoll, Thomas M ;
    Sakhare, Rahul Suryakant
    2025-09-23 | PDF
    Most state agencies have good practices for monitoring congestion on roadways within their jurisdiction. Many urbanized areas span state boundaries, where incidents, work zones, and congestion often impact neighboring states or municipalities. States with urbanized borders that experience congestion often develop informal communication procedures a ...
  • Urban Growth Congestion and Equity Leveraging MultiMobility and Active Infrastructure Investments for Livable Cities A Dissertation
    Urban Growth, Congestion, and Equity: Leveraging Multi-Mobility and Active Infrastructure Investments for Livable Cities: A Dissertation
    Raymer, Meredith
    ORCID ICON IMG
    2025-09-01 | PDF
    Cities are dynamics centers of modern life, continually evolving through both growth and decline. While agglomeration and associated amenities are benefits of growing global urbanization, congestion and the resulting pollution, delays, and inequity are common negative externalities of increasing urbanization. This study evaluates growth and congest ...
  • Evaluation of Combining Heat Induction and Laser Ablation for the Removal of Potentially Hazardous Bridge Coatings
    Evaluation of Combining Heat Induction and Laser Ablation for the Removal of Potentially Hazardous Bridge Coatings
    Sharp, Stephen R ;
    Provines, Jason T.
    2025-09-01 | PDF
    This project aimed to evaluate whether combining induction coating removal (ICR) and laser ablation coating removal (LACR) could be combined to remove hazardous bridge coatings at practical rates. This study included evaluations of the coating removal rates, surface cleanliness, surface profile, steel substrate mechanical properties, recoating adhe ...
  • Assessment of UltraHigh Toughness Steel for Highway Bridges
    Assessment of Ultra-High Toughness Steel for Highway Bridges
    Collins, William ;
    Artmont, Frank A.
    2025-09-01 | PDF
    The objective of this study was to investigate the effectiveness of using ultra-high toughness (UHT) steel in bridges to improve the structural reliability for the fracture limit state. The work included literature review, identification of candidate UHT steels, initial material characterization of all candidate steels, in-depth material characteri ...
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