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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 4161 - 4180 of 36908 results
  • Transportation Equity Needs Assessment Toolkit
    Transportation Equity Needs Assessment Toolkit
    Williams, Kristine ;
    Boyd, Tia
    2021-04-01 | PDF
    This project would complement the Transportation Equity Scorecard ─ a tool for project screening and prioritization ─ that is currently being developed by the project team with funding from CTEDD. For this RFP, we propose developing a needs assessment audit tool and supporting guidance to demonstrate how the equity criteria and methods in the Score ...
  • Review of TRAC Program Local Investment Factors
    Review of TRAC Program Local Investment Factors
    Sperry, Benjamin R. ;
    Lozier, William C
    2021-04-01 | PDF
    The Transportation Review Advisory Council (TRAC) program is the mechanism through which the Ohio Department of Transportation (ODOT) provides funding for Major New Capacity and other critical infrastructure projects within the state. As part of the evaluation process for TRAC funding consideration, the value of local infrastructure (roadways, util ...
  • PostFire Damage Inspection of Concrete Structures Final Report
    Post-Fire Damage Inspection of Concrete Structures: Final Report
    Gerasimidis, Simos ;
    Civjan, Scott
    2021-04-01 | PDF
    Although concrete tunnel structures can lose strength and long-term durability due to fire, literature on the remaining capacity of structures after fire events is scattered, and few published post-fire inspection protocols exist, especially for tunnel structures. This project investigates the deleterious effects of fire on concrete tunnel structur ...
  • Work Zone Capacity Estimation for High Truck Volume Routes in Arkansas Predicting Highway Capacity through Work Zones with High Truck Volumes and Reduced Lane Geometry Based Upon Local Conditions
    Work Zone Capacity Estimation for High Truck Volume Routes in Arkansas: Predicting Highway Capacity through Work Zones with High Truck Volumes and Reduced Lane Geometry Based Upon Local Conditions
    Romano, Kimberly K ;
    McKenney, Christopher T
    2021-04-01 | PDF
    Work zones on freeways are estimated to contribute to nearly 24 percent of non‐recurring delay. Prior to 2010, the Highway Capacity Manual (HCM) provided limited guidance on vehicular capacity impacts for freeway work zones. Simplified methodologies estimated capacities for short and long term freeway work zones. Previous research (MBTC 2025) condu ...
  • Tools and Strategies for Developing Winter Weather Indexes Research Brief
    Tools and Strategies for Developing Winter Weather Indexes [Research Brief]
    Rosenow, Ken
    2021-04-01 | PDF
    Researchers developed a step-by-step guide and a flowchart tool to help agencies identify or develop severity index methods that fit their needs and their available data sources.
  • Estimating Traffic Stream Density Using Connected Vehicle Data
    Estimating Traffic Stream Density Using Connected Vehicle Data
    Aljamal, Mohammad A ;
    Abdelghaffar, Hossam M.
    2021-04-01 | PDF
    The macroscopic traffic stream density is crucial in advanced traffic management systems. However, measuring the traffic density in the field is difficult since it is categorized as a spatial measurement. In this report, several estimation approaches are developed to estimate the traffic stream density on signalized links using connected vehicle (C ...
  • Predicting Bus Travel Times in Washington DC Using Artificial Neural Networks ANNs
    Predicting Bus Travel Times in Washington, DC Using Artificial Neural Networks (ANNs)
    Arhin, Stephen ;
    Manandhar, Babin
    2021-04-01 | PDF
    Washington, DC is ranked second among cities in terms of highest public transit commuters in the United States, with approximately9% of the working population using the Washington Metropolitan Area Transit Authority (WMATA) Metrobuses to commute. Deducing accurate travel times of these metrobuses is an important task for transit authorities to prov ...
  • An Intersectoral Approach To Study Built Environment Factors Affecting Postpartum Depression and Childrens Health
    An Intersectoral Approach To Study Built Environment Factors Affecting Postpartum Depression and Children’s Health
    Zhang, Yiye ;
    Hermann, Alison
    2021-03-31 | PDF
    This study examined the association of the quality of built environment in the neighborhood and maternal mental health. In Aim 1 of its 3 aims, we developed predictive models to predict and subtype postpartum depression (PPD) using clinical and built environment information. The predictive model was constructed using a combination of machine learni ...
  • Spatial Sustainability Assessment of Green Stormwater Infrastructure for Surface Transportation Planning Phase III
    Spatial Sustainability Assessment of Green Stormwater Infrastructure for Surface Transportation Planning, Phase III
    Zhang, Qiong ;
    Xu, Xiaofan
    2021-03-31 | PDF
    Transportation authorities are responsible for managing the stormwater runoff that carries pollutants from the transportation-adjacent land and vehicles. The proper stormwater management approach like green infrastructure can help control flooding and the runoff pollutants that may impair water environment and threaten the ecosystem and human healt ...
  • Ebikes Effect on Mode and Route Choice A Case Study of Richmond VA Bike Share
    E-bikes’ Effect on Mode and Route Choice: A Case Study of Richmond, VA Bike Share
    Chavis, Celeste ;
    Martinez, Vanessa Frias
    2021-03-31 | PDF
    The bicycle has become a legitimate transportation option in many cities due to its different benefits. Lower transportation costs, health improvement, and lower emission rates are some critical benefits of a bicycle ride. A large body of research exists on bicycle route choice and travel behavior. There is currently a lack of research on mode shif ...
  • Understand Usage Patterns of EScooter Sharing and Policy Implications
    Understand Usage Patterns of E-Scooter Sharing and Policy Implications
    Zhang, Yu ;
    Guo, Yujie
    2021-03-31 | PDF
    Shared e-scooter is a fairly new transportation mode that emerged in late 2017. Since then, it has gained popularity around the world; however, it also has spiraled into disarray in many cities due to the lack of e scooter regulations and improper parking and riding behaviors. Limited understanding of shared e-scooters restrains policymakers from d ...
  • Towards Integrating Resilience into Everyday Transportation Practices of Coastal and River Valley Communities
    Towards Integrating Resilience into Everyday Transportation Practices of Coastal and River Valley Communities
    Herrera, Nelida ;
    Wolshon, Brian
    2021-03-31 | PDF
    Coastal and river valley communities have become increasingly vulnerable to sea level rise and other disasters which can disrupt transportation systems. Therefore, it is important for these systems to be resilient. Analyzing the resilience of transportation systems is important for practitioners and decision makers to identify weaknesses within the ...
  • Development of Comprehensive Inspection Protocols for Deteriorated Steel Beam Ends
    Development of Comprehensive Inspection Protocols for Deteriorated Steel Beam Ends
    Tzortzinis, Georgios ;
    Pryor, Gabrielle
    2021-03-31 | PDF
    Recent research has developed new improved procedures that accurately describe the remaining loadcarrying capacity of these deteriorated members. These new procedures are based on computational simulations and experimental testing of real deteriorated beams. The outcome of a recently completed research project (“Development of Load Rating Procedure ...
  • Evaluation of Camber and Deflections for Bridge Girders
    Evaluation of Camber and Deflections for Bridge Girders
    Cakmak, Furkan ;
    Menkulasi, Fatmir
    2021-03-31 | PDF
    A methodology to predict each stage of camber and displacements in composite prestressed concrete and steel bridge superstructures from inception to end of service life including a prediction of rebound in deck replacement projects is presented. The methodology invokes the use of multiple creep curves and allows the proper simulation of various con ...
  • NonMyopic PathFinding for SharedRide Vehicles A BiCriteria BestPath Approach Considering Travel Time and Proximity To Demand
    Non-Myopic Path-Finding for Shared-Ride Vehicles: A Bi-Criteria Best-Path Approach Considering Travel Time and Proximity To Demand
    Hyland, Michael ;
    Yang, Dingtong
    2021-03-30 | PDF
    The goal of this research project is to improve the operational efficiency of shared-ride mobility-on-demand services (SRMoDS). SRMoDS ranging from UberPool to micro-transit have the potential to provide travelers mobility benefits that are comparable to existing ride-hailing services without shared rides such as UberX, but at a lower cost and with ...
  • Pavement Preservation Guide Update for SDDOT and Local Agencies
    Pavement Preservation Guide Update for SDDOT and Local Agencies
    Rada, Gonzalo R. ;
    Hicks, Gary R.
    2021-03-26 | PDF
    Pavement preservation is a strategy of maintaining a pavement’s functional condition at relatively low cost. By extending pavement life and enhancing pavement performance, preservation practices provide and maintain serviceable roadways in a cost-effective manner. To help with the pavement preservation decision-making process, the South Dakota Depa ...
  • Integration of UAS Into Operations Conducted by New England Departments of Transportation Develop Implementation Procedures for UAS Applications Task 4 Report
    Integration of UAS Into Operations Conducted by New England Departments of Transportation – Develop Implementation Procedures for UAS Applications (Task 4 Report)
    Mallela, Jagannath ;
    Wheeler, Paul
    2021-03-22 | PDF
    Unmanned aircraft systems (UAS) technology is proving to enhance State Department of Transportation (DOT) practices as an innovative and inexpensive solution that improves safety and accessibility, reduces cost, streamlines processes, improves workforce utilization, and accelerates several transportation operations activities. A few studies have be ...
  • Measuring the Impact of the LargeScale Adoption of Ridesharing on the Spread of Infectious Diseases
    Measuring the Impact of the Large-Scale Adoption of Ridesharing on the Spread of Infectious Diseases
    Paudel, Diwas ;
    Melendez, Kevin A
    2021-03-21 | PDF
    In the near future, ride-sharing vehicles are expected to serve a significant fraction of the transportation demands in cities and urban areas. In the past two decades, there has been an increased occurrence of highly infectious diseases like COVID-19 in the world. The simultaneous increase in ride-sharing penetration in the cities and the occurren ...
  • Lifecycle Assessment Using Snowplow Trucks Automatic Vehicle Location Data
    Lifecycle Assessment Using Snowplow Trucks' Automatic Vehicle Location Data
    Liu, Xiaoyue Cathy ;
    Yi, Zhiyan
    2021-03-21 | PDF
    Snowplow trucks serve a crucial role in winter maintenance activities by removing, loading and disposing snow. An effective performance monitoring and analysis process can assist transportation agencies in effectively managing the snowplow trucks and maintaining normal functioning of roadways. Previous literature suggests that most snowplow truck p ...
  • Performance Evaluation of Asphalt Mixtures Statewide
    Performance Evaluation of Asphalt Mixtures Statewide
    Bennert, Thomas
    2021-03-19 | PDF
    Currently, asphalt mixtures are design using volumetric concepts to determine optimum asphalt content levels with no means of verifying mixture performance prior to field production and placement. A new design methodology called Balanced Mixture Design (BMD) promotes the use of evaluating and design asphalt mixture using rutting and fatigue crackin ...
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