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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 1081 - 1100 of 35448 results
  • Logistics Sprawl Impacts on Ecommerce Travel Patterns Project 07165 Video
    Logistics Sprawl Impacts on E-commerce Travel Patterns: Project 0-7165 [Video]
    Texas Department of Transportation. Research and Technology Implementation Office
    2024-03-01 | MPEG
    E-commerce services and facilities have the benefits of bringing new employment opportunities to communities and meeting consumer needs, but they also attract heavy traffic, which results in congestion and negative environmental and economic impacts. A University of Texas Center for Transportation Research project recently completed research on fut ...
    Supporting Files
  • Design of Landslide Stabilization Using the Strength Reduction Method and LRFD
    Design of Landslide Stabilization Using the Strength Reduction Method and LRFD
    Strom, Lucas O ;
    Varathungarajan, David A.
    2024-03-01 | PDF
    Current design methods for landslide stabilization with numerical modeling do not bridge the gap between the strength reduction method (SRM) and load and resistance factor design (LRFD), resulting in designers making assumptions about how LRFD design criteria (which were developed based on limit-equilibrium analyses) translate to design using numer ...
  • Finding HighPerforming Aggregate Bases for LongLasting Pavement Summary
    Finding High-Performing Aggregate Bases for Long-Lasting Pavement [Summary]
    CTC & Associates LLC
    2024-03-01 | PDF
    This Research Summary is part of Report 2024-01, "Performance Monitoring of Olmsted CR 117 and 104 and Aggregate Base Material Update," published March 2024.
  • Toward a Florida Automated Connected Electric and Shared ACES Transportation System Roadmap Phase II Summary
    Toward a Florida Automated, Connected, Electric, and Shared (ACES) Transportation System Roadmap: Phase II [Summary]
    Lin, Pei-Sung ;
    Ponnaluri, Raj
    2024-03-01 | PDF
    Automated, connected, electric, and shared (ACES) technologies are rapidly evolving and will continue to impact the development of vehicles, infrastructure, communities, commerce, and the economy. Based on the Florida ACES transportation system roadmap for Florida developed in Phase I, this project aimed to engage with private industries to leverag ...
  • Designing an Autonomous Service to Cover Transits Last Mile in LowDensity Areas
    Designing an Autonomous Service to Cover Transit’s Last Mile in Low-Density Areas
    Khani, Alireza ;
    Aalipour, Ali
    2024-03-01 | PDF
    Public transportation provides a safe, convenient, affordable, and environmentally friendly mobility service. However, due to its fixed routes and limited network coverage, it is sometimes difficult or impossible for passengers to walk from a transit stop to their destination. This inaccessibility problem is also known as the “transit last-mile con ...
  • Quantification of Field Performance and Nondestructive Testing of Timber Bridges in Colorado Brief
    Quantification of Field Performance and Nondestructive Testing of Timber Bridges in Colorado [Brief]
    Kim, Yail Jimmy
    2024-03-01 | PDF
    This report presents two major aspects related to evaluating timber bridges with nondestructive testing: i) laboratory experiments and ii) field applications. The first part of the report discusses the degradation processes and resulting outcomes of structural timber, Douglas Fir, that is broadly used for bridge construction. In accordance with the ...
  • Investigating Implementation Potentials of Turbo Roundabouts in Nevada
    Investigating Implementation Potentials of Turbo Roundabouts in Nevada
    Dey, Kakan ;
    Naik, Bhaven
    2024-03-01 | PDF
    Turbo Roundabouts – an emergent and “new” concept in the design of roundabouts – has the potential to address the limitations experienced with the adoption of multi-lane (2x2) roundabouts. The turbo roundabout can effectively guide drivers within the roundabout by restricting lane-changing and reducing lane-change-related conflicts, which are commo ...
  • Development of a Formalized Program for InService Inspection of Pedestrian Bridges
    Development of a Formalized Program for In-Service Inspection of Pedestrian Bridges
    Alharthi, Aedh A ;
    Connor, Robert J.
    2024-03-01 | PDF
    Currently, there are no universally accepted procedures or criteria related to the inspection of pedestrian bridges in the U.S. While some states have some criteria in place, the FHWA has no specific recommendations or requirements for such structures. However, pedestrian bridges can be very complex structures in some cases, whether by using non-re ...
  • Development of a Formalized Program for InService Inspection of Pedestrian Bridges Summary
    Development of a Formalized Program for In-Service Inspection of Pedestrian Bridges [Summary]
    Alharthi, Aedh A ;
    Connor, Robert J.
    2024-03-01 | PDF
    Currently, there are no universally accepted procedures or criteria related to the inspection of pedestrian bridges in the U.S. While some states have some criteria in place, the FHWA has no specific recommendations or requirements for such structures. However, pedestrian bridges can be very complex structures in some cases, whether by using non-re ...
  • Evaluating the Potential Benefits of Implementing AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical and System Redundant Members
    Evaluating the Potential Benefits of Implementing AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical and System Redundant Members
    Connor, Robert J. ;
    Korkmaz, Cem
    2024-03-01 | PDF
    An exploratory study was conducted for some bridges in the state of Indiana that evaluated the implementation potential of the AASHTO Guide Specifications for Internal Redundancy of Mechanically-Fastened Built-Up Steel Members (IRM Guide Specification) and the AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical Memb ...
  • Evaluating the Potential Benefits of Implementing AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical and System Redundant Members Summary
    Evaluating the Potential Benefits of Implementing AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical and System Redundant Members [Summary]
    Connor, Robert J. ;
    Korkmaz, Cem
    2024-03-01 | PDF
    An exploratory study was conducted for some bridges in the state of Indiana that evaluated the implementation potential of the AASHTO Guide Specifications for Internal Redundancy of Mechanically-Fastened Built-Up Steel Members (IRM Guide Specification) and the AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical Memb ...
  • Methods To Identify Problematic Carriers and Prevent Infrastructure Damage
    Methods To Identify Problematic Carriers and Prevent Infrastructure Damage
    Gazzillo, Jennifer ;
    Riessman, Robin
    2024-03-01 | PDF
    Routinely collected Massachusetts data sets, including overweight permit applications and commercial truck inspections, are underused in safety and infrastructure analysis. Data warehousing and computing capabilities are advancing to allow live-time trend monitoring which could enhance enforcement efforts of overweight vehicles through proactive an ...
  • How Will Californias Electric Vehicle Policy Impact StateGenerated Transportation Revenues Projecting Scenarios through 2040 Summary
    How Will California’s Electric Vehicle Policy Impact State-Generated Transportation Revenues? Projecting Scenarios through 2040 [Summary]
    Agrawal, Asha Weinstein ;
    King, Hannah
    2024-03-01 | PDF
    California faces unprecedented uncertainty about how much revenue the state will raise from a package of taxes on motor fuels and annual registration fees on light-duty vehicles that was established in 2017 by Senate Bill 1 (SB 1). The SB 1 taxes are by far the largest source of revenue that the State of California generates to support maintenance, ...
  • Partially Grouted Revetment for LowVolume Road Bridges
    Partially Grouted Revetment for Low-Volume Road Bridges
    Freeseman, Katelyn ;
    Phares, Brent
    2024-03-01 | PDF
    The Iowa secondary road system has a large number of scour-susceptible bridges or bridges with unknown foundation conditions. These structures are commonly required to have a plan of action (POA) to close them during flood events, or have countermeasures installed to keep them open. In the case of unknown foundations, countermeasures must be instal ...
  • A Survey of Universal Basic Mobility Programs and Pilots in the United States
    A Survey of Universal Basic Mobility Programs and Pilots in the United States
    Rodier, Caroline ;
    Tovar, Angelly J
    2024-03-01 | PDF
    A lack of reliable and affordable transportation exacerbates socioeconomic inequities for low-income individuals, especially people of color. Universal Basic Mobility (UBM) pilots or programs are a relatively new approach to addressing financial barriers to travel among the transport-disadvantaged. UBMs provide individuals with funds for various mo ...
  • FullScale Dynamic Wireless Power Transfer and Pilot Project Implementation
    Full-Scale Dynamic Wireless Power Transfer and Pilot Project Implementation
    Moncada, Oscar Andrés ;
    Imran, Zainab
    2024-03-01 | PDF
    Considering the challenges hindering the widespread adoption of electric vehicles (EVs) and heavy-duty electric vehicles (HDEVs), the integration of dynamic wireless power transfer (DWPT) technology into roadways has gained interest. By embedding DWPT components into pavement, electrical power can be delivered to an EV or HDEV as they are in motion ...
  • Sequential Synchronization Control Scheme for Freeway Truck Platooning Formation
    Sequential Synchronization Control Scheme for Freeway Truck Platooning Formation
    Du, Lili ;
    Washburn, Scott S.
    2024-03-01 | PDF
    Truck platooning has been demonstrated as a promising approach to reduce freeway congestion, engine energy consumption, and associated emissions. However, efficient local-level algorithms to form a truck platoon without jeopardizing surrounding traffic flow’s safety and efficiency are still lacking. Motivated by this view, this study developed a Se ...
  • Improving Roadway Debris Clearance for CHART Responders
    Improving Roadway Debris Clearance for CHART Responders
    Gong, Yaobang ;
    Tarafdar, Sayantan
    2024-03-01 | PDF
    This project evaluates LaneBlade® technology's feasibility and effectiveness in enhancing roadway debris clearance operations, focusing on improving safety for CHART responders and road users while optimizing operational efficiency. Through structured field experiments considering weather conditions, debris types, blade types, and operating speeds, ...
  • Using Apps to Notify the Public of Local Road and Bridge Closures
    Using Apps to Notify the Public of Local Road and Bridge Closures
    Deeter, Dean ;
    Roelofs, Tina
    2024-03-01 | PDF
    The traveling public increasingly relies on navigation systems, either as part of their vehicles or through their handheld phones or mobile devices. Currently there is not a consistent system, tool, or process being used by cities and counties in Minnesota to report road or bridge closures that local transportation agencies can use to display to th ...
  • Material Characterization and Determination of MEPDG Input Parameters for Indiana Superpave 5 Asphalt Mixtures
    Material Characterization and Determination of MEPDG Input Parameters for Indiana Superpave 5 Asphalt Mixtures
    Cho, Seonghwan ;
    Bagchi, Tandra
    2024-03-01 | PDF
    Superpave 5 (SP 5) has the ability to slow asphalt binder aging in asphalt pavements, which is why the SP 5 mix with optimum asphalt binder content to yield 5% air voids has recently been used in Indiana roads. INDOT also uses the AASHTOWare Pavement ME design software in pavement design, and the current asphalt aging prediction model in Pavement M ...
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