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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 3981 - 4000 of 36908 results
  • Safety Mobility and Cost Benefits of Closing One Direction of the Interstate in Rural Areas During Construction Work
    Safety, Mobility, and Cost Benefits of Closing One Direction of the Interstate in Rural Areas During Construction Work
    Padhey, Suyash ;
    Mwamba, Isaiah
    2021-06-01 | PDF
    With specific regard to interstates in the rural area, Indiana Department of Transportation (INDOT) has expressed a need for research that sheds light on this Maintenance of Traffic (MOT) issue so the agency [INDOT and the contractor] can make informed decisions regarding the crossover sections versus the closure in one direction with detour roads. ...
  • Development of GrassRoots Data Collection Methods in Rural Isolated and Tribal Communities
    Development of Grass-Roots Data Collection Methods in Rural, Isolated, and Tribal Communities
    Chang, Kevin ;
    Hodgson, Cody
    2021-06-01 | PDF
    While extensive procedures have been developed for the collection and dissemination of motor vehicle volumes and speeds, these same procedures cannot always be used to collect pedestrian data, given the comparably unpredictable behavior of pedestrians and their smaller physical size. There is significant value to developing lower cost, lower intrus ...
  • Aggregate Subgrade Improvements Using Quarry ByProducts A Field Investigation
    Aggregate Subgrade Improvements Using Quarry By-Products: A Field Investigation
    Qamhia, Issam I. A. ;
    Tutumluer, Erol
    2021-06-01 | PDF
    This report presents a case study for constructing aggregate subgrade improvement (ASI) layers using quarry by-product aggregates (QBA), a quarry mix of large primary crushed rocks (PCR) and sand-sized quarry fines. The construction took place at Larry Power Road in Bourbonnais Township in Kankakee County, Illinois, where the Illinois Department of ...
  • Postimplementation Evaluation of Integrated Corridor Management ICM in North Carolina
    Post-implementation Evaluation of Integrated Corridor Management (ICM) in North Carolina
    Chase, R. Thomas ;
    Samandar, Shoaib
    2021-06-01 | PDF
    Integrated Corridor Management (ICM) systems offer the potential to manage both travel demand and network demand in normal and abnormal conditions. Traditionally, ICM is typically applied in an urban setting where multiple transportation modes are readily available. NCDOT has applied ICM principles, but in more rural applications where less modal a ...
  • SCDOT Project Development Process Update and Best Practices
    SCDOT Project Development Process: Update and Best Practices
    Bausman, Dennis ;
    Haidary, Tanin
    2021-06-01 | PDF
    In the United States, federal, state, and local governments are responsible for addressing their residents' transportation infrastructure needs. Similar to most State Department of Transportation (State DOTs), the South Carolina Department of Transportation (SCDOT) is responsible for owning, operating, and maintaining a large transportation system ...
  • Dynamic Routing of Trucks and Truck Platoons Using RealTime Traffic Simulators
    Dynamic Routing of Trucks and Truck Platoons Using Real-Time Traffic Simulators
    Ioannou, Petros ;
    Chen, Pengfei
    2021-06-01 | PDF
    Today’s vehicle navigation systems have limited ability to predict. The lack of coordination among different shippers and of information on the transport network make it difficult to predict changes in the transportation networks due to upcoming loads. The need for an intelligent freight assignment system becomes more urgent with the surge of techn ...
  • Developing an Effective Targeted Mobile Application to Enhance Transportation Safety and Use of Active Transportation Modes in Fresno County The Role of Application Design Content
    Developing an Effective Targeted Mobile Application to Enhance Transportation Safety and Use of Active Transportation Modes in Fresno County: The Role of Application Design & Content
    Sarofim, Samer
    2021-06-01 | PDF
    This research empirically investigates the need for, and the effective design and content of, a proposed mobile application that is targeted at pedestrians and cyclists in Fresno County. The differential effect of the proposed mobile app name and colors on the target audience opinions was examined. Further, app content and features were evaluated f ...
  • Technology Utilization Plan for the Texas Technology Task Force
    Technology Utilization Plan [for the Texas Technology Task Force]
    Chin, Kristie ;
    Gold, Andrea
    2021-06-01 | PDF
    The Texas Technology Task Force was formed to help Texas Department of Transportation (TxDOT) to remain at the forefront of innovative transportation, by serving as a cross-functional advisory dedicated to providing guidance on essential strategies, innovation, and communication tools for emerging technologies. The Task Force, together with TxDOT, ...
  • Full Depth Reclamation for Urban Suburban Street Application
    Full Depth Reclamation for Urban Suburban Street Application
    Miller, Susan
    2021-06-01 | PDF
    Full-depth reclamation (FDR), a common strategy on rural roadways to reduce costs for materials and hauling, was validated to be a viable long-term and cost-effective option for urban and suburban asphalt pavement rehabilitation. These findings were published in two Minnesota Local Road Research Board studies from 2016. However, statewide applicati ...
    Supporting Files
  • Analysis of Aramid Synthetic Fibers in Asphalt Mixes on Local Roads
    Analysis of Aramid Synthetic Fibers in Asphalt Mixes on Local Roads
    Nazzal, Munir D. ;
    Al-Hosainat, Ahmad
    2021-06-01 | PDF
    This report summarizes the results of a research project that was conducted to evaluate the cracking resistance of aramid fiber-reinforced asphalt mixes used for resurfacing applications on local roads and compare it to that of polymer-modified asphalt mixes. This project was divided into two phases. Based on the results of laboratory study in Phas ...
  • Improving Future of the Commonwealths Curb
    Improving Future of the Commonwealth’s Curb
    Gonzales, Eric J. ;
    Roberts, Shannon C
    2021-06-01 | PDF
    Demands for use of the curb space (curbside lanes and the adjacent sidewalk space) are evolving quickly across the Commonwealth of Massachusetts as municipalities of all sizes juggle the competing needs of pedestrians, cyclists, transit, transportation network companies (TNCs), in addition to conventional uses for parking, goods delivery, and emerg ...
  • BenchScale Electrochemical Treatment of CoContaminated Clayey Soil
    Bench-Scale Electrochemical Treatment of Co-Contaminated Clayey Soil
    Pelletier, Austin ;
    Hohner, Amanda K.
    2021-06-01 | PDF
    Industrial soil contamination is frequently unearthed by transportation agencies during construction within the right-of-way. As a result, transportation agencies may experience construction delays. Soils co-contaminated with high-molecular-weight polycyclic aromatic hydrocarbons (HMW-PAHs) and metals are commonly encountered in Illinois and exhibi ...
  • Freeway Segment Safety Performance Function SPF Development
    Freeway Segment Safety Performance Function (SPF) Development
    Himes, Scott ;
    Schenk, Kendra
    2021-06-01 | PDF
    This report documents the Ohio Department of Transportation’s effort to improve the reliability of safety decision-making through the development of planning-level and project design-level safety performance functions (SPFs). Planning-level SPFs will replace calibrated versions of national SPFs in Safety Analyst to support network screening. Projec ...
  • Investigation of Workflow Processes and Best Practices in Kentuckys CDL Program
    Investigation of Workflow Processes and Best Practices in Kentucky’s CDL Program
    Keathley-Helil, Valerie ;
    Martin, Andrew
    2021-06-01 | PDF
    Kentucky’s Division of Driver Licensing maintains the driver history records for all licensed drivers in Kentucky. It serves as the state driver licensing agency and is the locus for meeting the federal CDL requirements under 49 CFR 384. Kentucky relies on FMCSA’s Commercial Driver’s License Program Implementation (CDLPI) grant funding to subsidize ...
  • Determining Pavement Design Criteria for Recycled Aggregate Base and Large Stone Subbase
    Determining Pavement Design Criteria for Recycled Aggregate Base and Large Stone Subbase
    Cetin, Bora ;
    Coban, Haluk Sinan
    2021-06-01 | PDF
    This project was performed to evaluate the performance of recycled aggregates and large stones used in the aggregate base/subbase layers of pavement systems and provide recommendations regarding pavement design and material selection. As part of this project, eleven test cells were built at MnROAD to evaluate the impact of recycled aggregates and l ...
    Supporting Files
  • RheologyChemical Based Procedure To Evaluate AdditivesModifiers Used in Asphalt Binders for Performance Enhancements Phase 2
    Rheology-Chemical Based Procedure To Evaluate Additives/Modifiers Used in Asphalt Binders for Performance Enhancements: Phase 2
    Singhvi, Punit ;
    Mainieri, Javier Jesus Garcia
    2021-06-01 | PDF
    The increased use of softer binders in Illinois over the past decade is primarily attributed to the increased use of recycled materials in asphalt pavement construction. The shift in demand of using PG 58-28 over PG 64-22 has resulted in potential alternative methods to produce softer binders more economically using proprietary products. However, t ...
  • VISSIM Simulation Guidance
    VISSIM Simulation Guidance
    Hunter, Michael
    ORCID ICON IMG
    2021-06-01 | PDF
    Where analytical tools such as the Highway Capacity Software™ (HCS), SYNCHRO®, etc. do not adequately represent traffic operations within a study area, or do not provide the necessary performance metric(s) required for the analysis, detailed simulation or similar approaches may be required. In such cases, the Georgia Department of Transportation (G ...
  • Review and Summary of PreWet Methods and Procedures
    Review and Summary of Pre-Wet Methods and Procedures
    Shi, Xianming ;
    Bergner, Dave
    2021-06-01 | PDF
    Pre-wetting is an important tool in the toolbox of winter road maintenance (WRM) operations. This research project collected all available and recent information regarding pre-wetting practices through a comprehensive literature review, an online survey of WRM practitioners, interviews and case studies of nine selected agencies, and outreach to six ...
  • Traffic Control Device Analysis Testing and Evaluation Program FY2020 Activities
    Traffic Control Device Analysis, Testing, and Evaluation Program: FY2020 Activities
    Finley, Melisa D. ;
    Pike, Adam M.
    2021-06-01 | PDF
    This project provides the Texas Department of Transportation with a mechanism to conduct high-priority, limited-scope evaluations of traffic control devices. Work conducted and concluded during the 2020 fiscal year included: (1) review of retroreflective raised pavement marker practices; (2) review of optical speed bar practices in horizontal curve ...
  • Economic and Environmental Benefits of a Reduced Roadside Mowing Program for Kentucky Highways
    Economic and Environmental Benefits of a Reduced Roadside Mowing Program for Kentucky Highways
    Van Dyke, Chris ;
    Wallace, Candice
    2021-06-01 | PDF
    A growing number of state departments of transportation (DOTs) are introducing conservation mowing programs that aim to reduce the frequency of roadside mowing while expanding the footprint of pollinator habitat. Wanting to get a better handle on the utility conservation mowing, the Kentucky Transportation Cabinet (KYTC) funded this study to explor ...
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