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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 1 - 20 of 36908 results
  • Economic Analysis of Restricted Crossing UTurn RCUT Access Impacts in Georgia
    Economic Analysis of Restricted Crossing U-Turn (RCUT) Access Impacts in Georgia
    Tsai, Yichang (James) ;
    Yang, Zhongyu
    2026-10-01 | PDF
    Restricted Crossing U-Turn (RCUT) intersections are an established roadway design that state transportation agencies use to improve traffic operations. When the Georgia Department of Transportation (GDOT) proposes an RCUT, however, local communities and business owners frequently express concern that changing how customers enter and exit their prop ...
  • Synthesis of Capabilities Opportunities and Research Needs in UAS Technology for HighPrecision Bridge Inspection
    Synthesis of Capabilities, Opportunities, and Research Needs in UAS Technology for High-Precision Bridge Inspection
    Zhao, Yuxiang ;
    Golparvar-Fard, Mani
    2026-09-01 | PDF
    This report evaluates the potential role of camera-equipped unmanned aerial systems (UAS) as well as other forms of reality-mapping solutions in supporting bridge inspection practices for the Illinois Department of Transportation (IDOT). Traditional bridge inspections can require substantial labor, specialized access equipment, traffic control, and ...
  • A Programmatic ESA Consultation Framework for Bridge Construction and Maintenance in Illinois
    A Programmatic ESA Consultation Framework for Bridge Construction and Maintenance in Illinois
    Salas, Dan ;
    Petraitis, Megan
    2026-09-01 | PDF
    Transportation agencies are required to comply with Endangered Species Act (ESA) Section 7 obligations for bridge and highway projects that intersect aquatic and floodplain habitats supporting federally listed species. In Illinois, bridge construction, replacement, maintenance, and repair activities frequently overlap with the ranges of federally l ...
  • Remote Observation Over Time Drone in a Box Phase 1
    Remote Observation Over Time (Drone in a Box) - Phase 1
    Crowley, Jeremy
    ORCID ICON IMG
    2026-09-01 | PDF
    The Montana Department of Transportation (MDT) and the Autonomous Aerial Systems Office (AASO) at the University of Montana conducted a study evaluating the use of a drone in a box (DiaB) to evaluate natural disasters. Geographic Information System (GIS) was used to identify areas with high potential for natural disasters. A market survey was condu ...
  • Exploration of Technical Developments and Data Sources That May Have Implications for LongRange Transport Planning in Virginia
    Exploration of Technical Developments and Data Sources That May Have Implications for Long-Range Transport Planning in Virginia
    Gillespie, James S. ;
    Moruza, Audrey K.
    2026-09-01 | PDF
    VTrans is the Commonwealth of Virginia's statewide multimodal transportation plan. Virginia's Office of Intermodal Planning and Investment maintains the plan under the supervision of the state's Commonwealth Transportation Board. The plan's methodology uses several VTrans "trend trackers" that are quantifiable metrics updated annually; "macrotrends ...
  • Report 27R06 Exploration of Technical Developments and Data Sources That May Have Implications for Long Range Transport Planning in Virginia Research Project Brief
    Report 27-R06: Exploration of Technical Developments and Data Sources That May Have Implications for Long Range Transport Planning in Virginia [Research Project Brief]
    Gillespie, James S. ;
    Moruza, Audrey K.
    2026-09-01 | PDF
    The research reported herein supported the Office of Intermodal Planning and Investment's mission through three tasks related to these trackers, macrotrends, and objectives: (1) compile statistical series, historical values, and future forecasts to represent seven trend trackers in the VTrans framework; (2) estimate the differences between forecast ...
  • Predicting Highway Friction on an Annual Basis on Texas Network
    Predicting Highway Friction on an Annual Basis on Texas Network
    Sabillon-Orellana, Christian ;
    Inoue, Danilo
    2026-09-01 | PDF
    The research project developed a network-level model to predict highway friction at the network level on an annual basis. By analyzing pavement texture data and employing advanced artificial intelligence and machine learning techniques, the study established a quantifiable relationship between surface texture characteristics and friction. Extensive ...
  • Incorporating Resilience Considerations in Transportation Asset Management Planning and Project Selection Process
    Incorporating Resilience Considerations in Transportation Asset Management Planning and Project Selection Process
    Yu, Jinzhu ;
    Mattingly, Stephen
    2026-09-01 | PDF
    This research develops and demonstrates a resilience-based transportation asset management (TAM) framework for the Texas Department of Transportation (TxDOT) to incorporate resilience into asset assessment and project screening. The study (i) reviewed current TAM and resilience practices, (ii) assessed climate-related vulnerability for bridges and ...
  • Concrete Strength Sensing Using REBEL Sensors
    Concrete Strength Sensing Using REBEL Sensors
    Hossain, Mohammad I. ;
    Soltani, Matthew
    2026-09-01 | PDF
    This study evaluated the use of Resonance-Based Embedded Layer (REBEL) sensors as a nondestructive technology for real-time monitoring of in-place concrete strength in transportation infrastructure. The objective was to assess the accuracy, reliability, and field applicability of REBEL sensors relative to conventional laboratory testing methods use ...
  • Enhancement of Traffic Control Tool for Reopening of Flooded Roadways
    Enhancement of Traffic Control Tool for Reopening of Flooded Roadways
    Preciado, Jaime ;
    Ali, Fahad
    2026-09-01 | PDF
    Flooding can temporarily reduce the structural capacity of flexible pavement due to increased moisture in the unbound pavement layers including the embankment, which may accelerate fatigue cracking and rutting when traffic is restored before the pavement has sufficiently recovered. The Florida Department of Transportation (FDOT) has previously deve ...
  • LongTerm Maintenance Needs and Costs of GreenColored Pavement Markings and Flexible Post Delineators
    Long-Term Maintenance Needs and Costs of Green-Colored Pavement Markings and Flexible Post Delineators
    Brown, Janna I. ;
    Ohlms, Peter B.
    2026-09-01 | PDF
    In recent years, Virginia localities have expressed interest in installing two specific bicycle infrastructure elements: green-colored pavement markings (GCPMs) on bicycle facilities and flexible post delineators (referred to as flexposts) along separated bike lanes to improve conspicuity and safety. In some cases, these elements were pursued as pa ...
  • Implementing the ATSPMintheLoop Simulation Solution With the TxDOT Statewide ATSPM System Deployment Plan
    Implementing the ATSPM-in-the-Loop Simulation Solution With the TxDOT Statewide ATSPM System Deployment Plan
    Li, Pengfei (Taylor) ;
    Mattingly, Stephen P.
    2026-09-01 | PDF
    The research team developed step-by-step installation and troubleshooting guidelines for the Utah Department of Transportation Automated Traffic Signal Performance Measures (ATSPM) system (v4.3) and the UTA-In-Motion platform. Both systems were packaged into a single Docker image, reducing installation time from about 20 hours to 1 hour while elimi ...
  • Assess Approaches to Training and Developing Hydrology and Hydraulics HH Staff in Transportation Agencies
    Assess Approaches to Training and Developing Hydrology and Hydraulics (H&H) Staff in Transportation Agencies
    Johnson, Blair ;
    Sela, Lina
    2026-09-01 | PDF
    There is presently significant understaffing and turnover of staff specializing in Hydrology and Hydraulics (H&H) within agencies overseeing transportation infrastructure. To gain an understanding of the present state of knowledge and training among H&H staff across the transportation industry, surveys were carried out to evaluate the effectiveness ...
  • LongTerm Maintenance Needs and Costs of GreenColored Pavement Markings and Flexible Post Delineators Research Project Brief
    Long-Term Maintenance Needs and Costs of Green-Colored Pavement Markings and Flexible Post Delineators [Research Project Brief]
    Brown, Janna I. ;
    Ohlms, Peter B.
    2026-09-01 | PDF
    This study aimed to determine the costs, frequency, and necessary labor and equipment for maintaining two elements of bicycle and pedestrian infrastructure within Virginia: GCPMs and flexposts. The scope included various contexts (i.e., large metropolitan, small metropolitan, and rural areas). Flexpost applications for channelizing motor vehicle tr ...
  • Computer VisionBased Contactless Estimation of Asphalt Pavement Surface Friction
    Computer Vision-Based Contactless Estimation of Asphalt Pavement Surface Friction
    Al-Qadi, Imad L. ;
    Golparvar-Fard, Mani
    2026-09-01 | PDF
    This study developed a contactless and automated technique to estimate hot-mix asphalt pavement surface friction by combining computer vision image-based 3D reconstruction with machine learning. Existing continuous friction estimation equipment, including high-speed laser scanners, are costly to purchase and operate-limiting routine, frequent monit ...
  • A Study of Intermediate Geomaterials and Highly Erodible Rock
    A Study of Intermediate Geomaterials and Highly Erodible Rock
    Kulesza, Stacey E. ;
    Chavez, Wilson F. Espinoza
    2026-09-01 | PDF
    Although substantial research on soil erodibility has recently been conducted at the federal (e.g., NCHRP 915) and state (e.g., K-TRAN: KSU-15-4; K-TRAN: KSU-18-5) levels, information regarding erosion characteristics of rock or intermediate geomaterials, such as shale, is extremely limited. Shale exposure on cut slopes or natural slopes leads to p ...
  • A Study of Intermediate Geomaterials and Highly Erodible Rock Technical Summary
    A Study of Intermediate Geomaterials and Highly Erodible Rock [Technical Summary]
    Kulesza, Stacey E. ;
    Chavez, Wilson F. Espinoza
    2026-09-01 | PDF
    The primary objective of this research was to measure the erosion potential of Kansas shales at the surface and near the surface at a relatively shallow depth (2-3 ft). Considering the relationship between shale porosity and erodibility, this research also investigated the role of freeze-thaw cycles on shale porosity to predict a timeline of increa ...
  • Implementing the ATSPMintheLoop Simulation Solution With the TxDOT Statewide ATSPM System Deployment Plan Project Summary Report
    Implementing the ATSPM-in-the-Loop Simulation Solution With the TxDOT Statewide ATSPM System Deployment Plan [Project Summary Report]
    Li, Taylor ;
    Mattingly, Stephen
    2026-08-31 | PDF
    The research team from The University of Texas at Arlington completed a comprehensive set of software, simulation, controller integration, and deployment tasks to convert the earlier ATSPM in-the-loop concept into a practical implementation framework. • Documented the installation and configuration of UDOT ATSPM and UTA-In-Motion (UTAIM), including ...
  • Incorporating Resilience Considerations in Transportation Asset Management Planning and Project Selection Process Project Summary Report
    Incorporating Resilience Considerations in Transportation Asset Management Planning and Project Selection Process [Project Summary Report]
    Yu, Jinzhu ;
    Mattingly, Stephen
    2026-08-31 | PDF
    Texas transportation infrastructure is exposed to a wide range of hazards, including extreme heat, winter storms, inland flooding, and drought. The effects of these hazards vary substantially across the state and across different types of transportation assets, including roadways, pavements, bridges, culverts, and retaining walls. Transportation As ...
  • Monitoring of Urban Roadway Safety Hazards From Existing BusBased Video Imagery Phase 3
    Monitoring of Urban Roadway Safety Hazards From Existing Bus-Based Video Imagery: Phase 3
    Mishalani, Rabi G. ;
    McCord, Mark R.
    2026-08-31 | PDF
    Roadway traffic safety engineers consider crash data to identify locations and times of high hazard risk. While these data and the resulting identifications are valuable, they do not allow for capturing other locations and times prone to hazards where crashes have not occurred yet. Therefore, capturing conditions associated with safety hazards is e ...
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