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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 5601 - 5620 of 36958 results
  • Alternative Vehicles for Last Mile Freight
    Alternative Vehicles for Last Mile Freight
    Cherry, Christopher R. ;
    Azad, Mojdeh
    2019-12-01 | PDF
    This research addresses alternative vehicle use for last mile freight. To overcome the limitation in data availability, an e-trike delivery company was visited, and GPS data were collected during October and November 2017. We used different data analysis approaches to understand the characteristics of the delivery system including, speed, travel di ...
  • Development of Guidelines for HighVolume Recycled Materials for Sustainable Concrete Pavement
    Development of Guidelines for High-Volume Recycled Materials for Sustainable Concrete Pavement
    Volz, Jeffery S. ;
    Hartell, Julie Ann
    2019-12-01 | PDF
    The primary goal of this research was to produce concrete for conventional portland cement concrete pavement that incorporated at least 50% recycled materials without compromising performance and service life. The research investigated the use of recycled concrete aggregate (RCA) and fly ash as a means of achieving this goal. A series of mix design ...
  • Evaluation of Electrochemical Chloride Extractions Fiber Reinforced Polymer Wraps and Concrete Sealers for Corrosion Mitigation in Reinforced Concrete Bridge Structures
    Evaluation of Electrochemical Chloride Extractions, Fiber Reinforced Polymer Wraps, and Concrete Sealers for Corrosion Mitigation in Reinforced Concrete Bridge Structures
    Murphy, Michael S. ;
    Chauvin, Mark R.
    2019-12-01 | PDF
    Reinforced concrete bridge substructures in Minnesota and other northern climates possess an elevated risk for chloride induced corrosion damage, which can reduce capacity and shorten service life. Research was performed in 1997 to investigate new strategies for corrosion mitigation, including electrochemical chloride extraction (ECE) and installat ...
  • Every Day Counts OnRamp to Innovation EDC5 Progress Report 2 July December 2019
    Every Day Counts: On-Ramp to Innovation - EDC-5 Progress Report #2, July – December 2019.
    United States. Federal Highway Administration
    2019-12-01 | PDF
    Every Day Counts (EDC) is the Federal Highway Administration’s program to advance a culture of innovation in the transportation community in partnership with public and private stakeholders. Through this State-based effort, FHWA coordinates rapid deployment of proven strategies and technologies to shorten the project delivery process, enhance roadw ...
  • Feasibility of Using Video Image Detectors for Ramp Signal Operations and Performance Monitoring
    Feasibility of Using Video Image Detectors for Ramp Signal Operations and Performance Monitoring
    Gan, Albert ;
    Wu, Wanyang
    2019-12-01 | PDF
    District 6 Florida Department of Transportation (FDOT) has been using both inductive loops and Sensys Networks sensors at its 22 ramp signals on I-95 in Miami-Dade County, Florida. These detectors are used to detect vehicle volumes and occupancy, but do not collect traffic measures such as queue length and waiting time, which are desired for perfor ...
  • LTBP News Winter 2020
    LTBP News: Winter 2020
    United States. Federal Highway Administration
    2019-12-01 | PDF
    The Federal Highway Administration's Long-Term Bridge Performance (LTBP) program issues a quarterly newsletter to inform you about the progress and activities of the program. Brief updates on progress in important program activities are provided, including data collection, data releases, new products and publications, and data analysis.
  • Commercial Heavy Vehicle Impacts on Signalized Arterial Corridor Performance
    Commercial Heavy Vehicle Impacts on Signalized Arterial Corridor Performance
    Ozkul, Seckin ;
    Washburn, Scott S.
    2019-12-01 | PDF
    With changing population, economy, and business practices, there has been a significant increase in commercial truck traffic on urban roadways in Florida. Arterial corridors with heavy use by commercial vehicles often suffer from poor operational performance, either because they were not designed considering the current level of commercial truck tr ...
  • Commercial Heavy Vehicle Impacts on Signalized Arterial Corridor Performance Summary
    Commercial Heavy Vehicle Impacts on Signalized Arterial Corridor Performance [Summary]
    Ponnaluri, Raj ;
    Ozkul, Seckin
    2019-12-01 | PDF
    University of South Florida researchers used microsimulation to model the acceleration and deceleration of heavy vehicles and more accurately predict their impact on traffic flows.
  • Long Term Pavement Performance Monitoring of Six LTPP SPS10 Sections in Oklahoma With 3D Laser Imaging
    Long Term Pavement Performance Monitoring of Six LTPP SPS-10 Sections in Oklahoma With 3D Laser Imaging
    Wang, Kelvin ;
    Li, Joshua Q.
    2019-12-01 | PDF
    Under the LTPP Specific Pavement Study 10 (SPS-10) experiment initiative, the Oklahoma Department of Transportation (ODOT) constructed five warm mix asphalt (WMA) testing sections and one hot mix asphalt (HMA) control section. In this project several art-of-the-state instruments were used to collect a comprehensive array of pavement surface charact ...
  • Calcium Sulfoaluminate Cement Concrete for Prestressed Bridge Girders Prestressing Losses Bond and Strength Behavior
    Calcium Sulfoaluminate Cement Concrete for Prestressed Bridge Girders: Prestressing Losses, Bond, and Strength Behavior
    Markosian, Nicholas A ;
    Thomas, Robert J.
    2019-12-01 | PDF
    Calcium sulfoaluminate (CSA) cement was used to cast a prestressed voided deck slab bridge girder. The rapid-set properties of CSA cement allowed the initial concrete strength to reach the required 4300 psi needed in order to cut the prestressing strands 6.5 hours after casting. Prestress losses were monitored long term using vibrating wire strain ...
  • The Role of Transportation Networking Companies in Megaregion Mobility
    The Role of Transportation Networking Companies in Megaregion Mobility
    Jiao, Junfeng ;
    Bischak, Chris
    2019-12-01 | PDF
    Transportation Network Companies (TNCs) like Uber and Lyft have become popular forms of transportation in recent years. Researchers have worked to understand the qualitative impacts of these services, such as effects on the taxi industry, spatial and temporal distribution in cities, and effects on public transit; however, few studies have examined ...
  • Reducing Stormwater Runoff Volumes with Biochar Addition to Highway Soils
    Reducing Stormwater Runoff Volumes with Biochar Addition to Highway Soils
    Imhoff, Paul T. ;
    Maresca, Julia A
    2019-12-01 | PDF
    Stormwater runoff from roadways is a major source of pollution, but current stormwater treatment technologies, such as bioretention cells, do not efficiently remove contaminants. New technologies are needed that can both remove more pollutants and reduce the volume of stormwater discharge. Such technologies will not only improve water quality but r ...
  • Transportation Volume IID Development of UAS Emergency Service Drone Network for Use in Surface Transportation
    Transportation - Volume II-D: Development of UAS Emergency Service Drone Network for Use in Surface Transportation
    Chen, Danjue ;
    Xie, Yuanchang
    2019-12-01 | PDF
    This report provides a literature review on applications of UAS for emergency response and presents a procedure to develop a UAS network for emergency response in Massachusetts. The literature review focuses on public policy and administration aspects of UAS and the growing interest in applying UAS for emergency response, including traffic incident ...
  • Evaluation of Surface Treatments to Mitigate ASR
    Evaluation of Surface Treatments to Mitigate ASR
    Waidner, Matthew ;
    Deschenes Jr, Richard
    2019-12-01 | PDF
    Premature cracking of the barrier wall and pavement on I-49 south of Fayetteville, Arkansas due to a combination of Alkali-Silica Reaction (ASR) and freeze-thaw has led to ASR and freeze-thaw research at the University of Arkansas. Potential for further expansion (PFET), Damage Rating Index (DRI), and mitigation of freeze-thaw and ASR with sealers ...
  • Managing Utility Congestion Within RightsofWay
    Managing Utility Congestion Within Rights-of-Way
    Nemeth, Bryan ;
    Aulwes, Gina
    2019-12-01 | PDF
    Existing needs were identified when working with public utilities in rights-of-way (ROW). The needs include working in congested corridors, what to do with abandoned infrastructure, not receiving accurate mapping data from utility providers, not receiving requested information, how to address 5G and other new infrastructure, and not having construc ...
    Supporting Files
  • Condition Assessment of Bridge Decks with Asphalt Overlay
    Condition Assessment of Bridge Decks with Asphalt Overlay
    Pashoutani, Sepehr ;
    Zhu, Jinying
    2019-12-01 | PDF
    Ground penetrating RADAR (GPR) is a widely used nondestructive testing (NDT) method for bridge deck evaluation. However, the current GPR signal and data processing software and algorithms are not able to provide comprehensive information about bridge deck condition. Although the original objective of this research project was to develop GPR analysi ...
  • Enhancing Cybersecurity in Public Transportation Summary
    Enhancing Cybersecurity in Public Transportation [Summary]
    Ligatti, Jay
    2019-12-01 | PDF
    University of South Florida researchers developed guidance to identify and mitigate transit cybersecurity liabilities and to facilitate ongoing information exchange among Florida transit agencies, vendors, and cybersecurity researchers
  • GO ITHACA Downtown Ithaca Alliance Pilot Transportation Demand Management Program
    GO ITHACA: Downtown Ithaca Alliance Pilot Transportation Demand Management Program
    Wilber, Darlene M ;
    Ferguson, Gary
    2019-12-01 | PDF
    GO ITHACA is a downtown Ithaca-based personalized educational campaign that encourages downtown employees and residents who are single occupant vehicles users to learn about and sample sustainable modes of transportation such as walking, biking, transit and car-sharing through incentives customize to each program participant as a move towards livin ...
  • Integration of a Robust Automated Pedestrian Detection System for Signalized Intersections
    Integration of a Robust Automated Pedestrian Detection System for Signalized Intersections
    Lin, Pei-Sung ;
    Kourtellis, Achilleas
    2019-12-01 | PDF
    Improving pedestrian safety and making roadway facilities safer and friendlier for pedestrians are among the top priorities and transportation goals in Florida. The actuation of pedestrian “Walk” signal indications at signalized intersections and the triggering of rectangular rapid flash beacons (RRFBs) or high-intensity activated crosswalks (HAWKs ...
  • INDOT Research Program Benefit Cost AnalysisReturn on Investment for Projects Completed in FY 2018
    INDOT Research Program Benefit Cost Analysis—Return on Investment for Projects Completed in FY 2018
    McCullouch, Bob
    2019-12-01 | PDF
    This project produced a financial analysis of Indiana Department of Transportation's (INDOT’s) research projects completed in 2018, as requested annually by the Governor’s office. This analysis uses the approach of calculating net present values created by the implementation of research project to determine benefit cost ratios and return on the res ...
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