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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 3641 - 3660 of 36011 results
  • Evaluating the Private Sector Returns to Transportation Investments in Tennessee
    Evaluating the Private Sector Returns to Transportation Investments in Tennessee
    Murray, Matthew N. ;
    Welch, Jilleah G.
    2021-05-01 | PDF
    This report explores the way in which TDOT investments in state roads and interstate highways affect economic growth in Tennessee counties as measured by nonfarm employment, business establishments, personal income, per capita personal income and population. The goal is to estimate the private sector economic returns to public sector transportation ...
  • The Impacts and Adoption of Connected and Automated Vehicles in Tennessee
    The Impacts and Adoption of Connected and Automated Vehicles in Tennessee
    Mishra, Sabyasachee ;
    Golias, Mihalis M.
    2021-05-01 | PDF
    Connected and autonomous vehicles (CAVs) can revolutionize the daily travel modes, personal, public, or shared mobility because of technology-assisted driving. However, such a revolution will come at the cost of numerous anticipated barriers like accident liabilities, data safety concerns, the addition of new infrastructure, and increased emissions ...
  • Concepts of Operations for Autonomous Vehicle Dispatch Operations
    Concepts of Operations for Autonomous Vehicle Dispatch Operations
    Cummings, Mary ;
    Li, Songpo
    2021-05-01 | PDF
    The future of surface transportation will likely include fleets of autonomous vehicles (AVs), both passenger and freight. Such futuristic operations will require remote monitoring of individual and fleets of AVs through an operations center staffed by personnel that resemble present-day surface transportation dispatchers. This report outlines three ...
  • Evaluate Ohio Department of Transportations Ability To Decrease Dump Truck Backing Accidents Phase 2
    Evaluate Ohio Department of Transportation’s Ability To Decrease Dump Truck Backing Accidents (Phase 2)
    Wei, Heng ;
    Zhou, Frank Xuefu
    2021-05-01 | PDF
    As a result of the Phase 1 project, “Improper Backing” and “Inattention while Backing” are identified as two major causes of truck backing accidents. The comprehensive literature indicates that the probability of accidents occurring is about 70% in the rear area of a dump truck and about 20% in the right area. To that end, the overall goal of this ...
  • Building a GIS Workshop for High School Students
    Building a GIS Workshop for High School Students
    Orr, Meghan ;
    Olson, Ben
    2021-05-01 | PDF
    Geographic information systems are an increasingly relevant tool being used in a variety of workforces. While education on GIS is well developed at the collegiate level and in workforce training programs, it is underutilized in K-12 settings. Research indicates that learning GIS can improve spatial and critical thinking skills in students, key elem ...
  • Synthesis Study of Best Practices for Mapping and Coordinating Detours for Maintenance of Traffic MOT and Risk Assessment for Duration of Traffic Control Activities
    Synthesis Study of Best Practices for Mapping and Coordinating Detours for Maintenance of Traffic (MOT) and Risk Assessment for Duration of Traffic Control Activities
    Mwamba, Isaiah C ;
    Morshedi, Mohamadali
    2021-05-01 | PDF
    Maintenance of traffic (MOT) during construction periods is critical to the success of project delivery and the overall mission of transportation agencies. MOT plans may include full road closures and coordination of detours near construction areas. Various state DOTs have designed their own manuals for detour mapping and coordination. However, ver ...
  • Analysis Modeling and Simulation AMS Case Studies of Connected and Automated Vehicle CAV Implementations Specific to the South Central Region
    Analysis, Modeling, and Simulation (AMS) Case Studies of Connected and Automated Vehicle (CAV) Implementations Specific to the South Central Region
    Melson, Christopher ;
    Ma, Jiaqi
    2021-05-01 | PDF
    Connected and automated vehicles (CAVs) offer potentially transformative and far-reaching impacts to the transportation system. However, realized benefits will be directly tied to how well agencies prepare for these technologies. This report documents efforts that support CAV preparatory actions in Louisiana and includes: (1) conducting a stakehold ...
  • Wireless Crack Sensing Systems for Bridges
    Wireless Crack Sensing Systems for Bridges
    Wu, Chenglin
    ORCID ICON IMG
    2021-05-01 | PDF
    The main objective of this research was to develop and deploy a wireless crack sensing system that can measure and monitor cracks for both concrete and steel bridge structures. This system contained the sensing unit, wireless data transmitting system, as well as a data processing unit. The sensing unit consisted of single or arrays of advanced thin ...
  • Detection and Classification of Concrete Patches by Integrating GPR and Surface Imaging
    Detection and Classification of Concrete Patches by Integrating GPR and Surface Imaging
    Cheng, Peng ;
    Krogmeier, James V.
    2021-05-01 | PDF
    This research considers the detection, location, and classification of patches in concrete and asphalt-on-concrete pavements using data taken from ground penetrating radar (GPR) and the WayLink 3D Imaging System. In particular, the project seeks to develop a patching table for “inverted-T” patches. A number of deep neural net methods were investiga ...
  • Americas Marine Highway Route Designations
    America’s Marine Highway Route Designations
    United States. Department of Transportation. Maritime Administration
    2021-05-01 | PDF
    The Marine Highway system currently includes 26 "Marine Highway Routes" that serve as extensions of the surface transportation system. Each all-water route is designated by the Secretary and offers relief to landside corridors suffering from traffic congestion, excessive air emissions or other environmental challenges.
  • Coordination of Freeway Ramp Meters and Arterial Traffic Signals Phase IIB Field Implementation
    Coordination of Freeway Ramp Meters and Arterial Traffic Signals Phase II-B – Field Implementation
    Skabardonis, Alexander ;
    Lu, Xiao-Yun
    2021-05-01 | PDF
    The independent operations of freeway ramp meters and the adjacent arterial intersection traffic signals often causes queue spill back on the freeway on-ramps and the surface street network that result in activation of queue override, which negates the benefits of ramp metering. This is due to the lack of coordination between the two traffic contro ...
  • Analysis, Modeling, and Simulation (AMS) Case Studies of Connected and Automated Vehicle (CAV) Implementations Specific to the South Central Region [supporting datasets]
    Melson, Christopher ;
    Ma, Jiaqi
    2021-05-01 | ZIP
    Connected and automated vehicles (CAVs) offer potentially transformative and far-reaching impacts to the transportation system. However, realized benefits will be directly tied to how well agencies prepare for these technologies. This report documents efforts that support CAV preparatory actions in Louisiana and includes: (1) conducting a stakehold ...
    Dataset Supporting Files
  • How Does Traffic or the Fear of It Affect Housing Affordability Examining the Effect of Traffic Impact Analysis on Housing Production and Affordability
    How Does Traffic, or the Fear of It, Affect Housing Affordability? Examining the Effect of Traffic Impact Analysis on Housing Production and Affordability
    Ding, Hao ;
    Taylor, Brian D.
    2021-05-01 | PDF
    Traffic impact analysis (TIA), which estimates the traffic impacts of proposed land development, tends to bias against higher density developments in urban areas where traffic is often congested and travel alternatives plentiful. This has important implications for housing supply and affordability, suburban sprawl, and private vehicle dependence. W ...
  • Evaluation of Pavement Service Life Extension Due to Asphalt Surface Treatment Interlayer Over SoilCement Base
    Evaluation of Pavement Service Life Extension Due to Asphalt Surface Treatment Interlayer Over Soil-Cement Base
    Khattak, Mohammad Jamal ;
    Baladi, Gilbert Y.
    2021-05-01 | PDF
    The Louisiana Department of Transportation and Development (DOTD) has been using asphalt surface treatment (AST) interlayers over soil-cement base courses for the last several years to control the reflective cracking of flexible pavements caused by soil-cement shrinkage. Even though DOTD has the specifications documents, the practice of AST interla ...
  • Design and Development of an Automated Truck Mounted Attenuator
    Design and Development of an Automated Truck Mounted Attenuator
    White, Elizabeth ;
    Mollenhauer, Michael A
    2021-05-01 | PDF
    Truck-Mounted Attenuators (TMAs) are energy-absorbing devices added to heavy shadow vehicles to provide a mobile barrier that protects work crews from errant vehicles entering active work zones. While the TMA is designed to absorb and/or redirect the energy from a colliding vehicle, there is still significant risk of injury to the TMA driver when s ...
  • Truck Platooning on Flexible Pavements in Illinois
    Truck Platooning on Flexible Pavements in Illinois
    Al-Qadi, Imad L ;
    Okte, Egemen
    2021-05-01 | PDF
    Truck platoons have many benefits over traditional truck mobility. Truck platoons have the potential to improve safety and reduce fuel consumption between 5% and 15%, based on platoon configuration. In Illinois, trucks carry more than 50% of freight tonnage and constitute 25% of the traffic on interstates. Therefore, expected fuel savings would be ...
  • Do Electricity Prices Affect Electric Vehicle Adoption
    Do Electricity Prices Affect Electric Vehicle Adoption?
    Bushnell, James ;
    Muehlegger, Erich
    2021-05-01 | PDF
    This report presents evidence that gasoline prices have a larger effect on demand for battery electric vehicles (BEVs) than do electricity prices in California. A spatially-disaggregated panel dataset of monthly BEV registration records was matched to detailed records of gasoline and electricity prices in California from 2014-2017, and the matched ...
  • Integrating Traffic Network Analysis and Communication Network Analysis at a Regional Scale to Support More Efficient Evacuation in Response to a Wildfire Event
    Integrating Traffic Network Analysis and Communication Network Analysis at a Regional Scale to Support More Efficient Evacuation in Response to a Wildfire Event
    Soga, Kenichi ;
    Comfort, Louise
    2021-05-01 | PDF
    As demonstrated by the Camp Fire evacuation, communications (city-to-city, city-to-residents) play important roles in coordinating traffic operations and safeguarding region-wide evacuation processes in wildfire events. This collaborative report across multiple domains (fire, communication and traffic), documents a series of simulations and finding ...
  • Predicting Vehicle Trajectories at Intersections Using Advanced Machine Learning Techniques
    Predicting Vehicle Trajectories at Intersections Using Advanced Machine Learning Techniques
    Jazayeri, Mohammad Sadegh ;
    Jahangiri, Arash
    2021-05-01 | PDF
    The ability to accurately predict vehicle trajectories is essential in infrastructure-based safety systems that aim to identify critical events such as near-crash situations and traffic violations. In a connected environment, important information about these critical events can be communicated to road users or the infrastructure to avoid or mitiga ...
  • Development and Evaluation of MASH TL4 Guardrail System
    Development and Evaluation of MASH TL-4 Guardrail System
    Sheikh, Nauman M. ;
    Bligh, Roger P.
    2021-05-01 | PDF
    Researchers at the Texas A&M Transportation Institute (TTI) designed and tested a Manual for Assessing Safety Hardware (MASH) Test Level 4 (TL-4) compliant metal guardrail system. The researchers first developed several preliminary design concepts of the guardrail system, one of which was selected by the Texas Department of Transportation (TxDOT) f ...
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