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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 841 - 860 of 35815 results
  • Road Weather Management Using Connected Vehicle Technology
    Road Weather Management Using Connected Vehicle Technology
    Perry, Frank ;
    Toth, Chris
    2024-09-01 | PDF
    Road weather systems collect, analyze, and share weather information to help mitigate the disruptive impact of weather events on the nation’s surface transportation system. Much research and development has been undertaken to advance road weather management practice. Meanwhile, many state and local efforts have aimed to deploy connected vehicle (CV ...
  • Guidelines for Utilization of Field Sands in Superpave Mixtures of Texas Project Summary Report
    Guidelines for Utilization of Field Sands in Superpave Mixtures of Texas [Project Summary Report]
    Abdallah, Imad N. ;
    Nazarian, Soheil
    2024-08-31 | PDF
    The objectives of this project were to determine the upper limit of specific field sand in a mix given the amount of active clay present in it, define the process to determine the clay content, and measure how they affect the performance of the asphalt mixtures. To address these objectives, this study focused on developing and verifying the guideli ...
  • Develop and Validate Precast Column Solutions for Texas Bridges Summary Report
    Develop and Validate Precast Column Solutions for Texas Bridges [Summary Report]
    Adediwura, Jade ;
    Bayrak, Oguzhan
    2024-08-31 | PDF
    The Texas Department of Transportation (TxDOT) initiated Project 0-7089 to explore the potential of using precast bridge substructures, particularly focusing on precast column solutions for multi- column bents. The project aimed to address the challenges and benefits associated with precast columns, which are known to expedite construction processe ...
  • Improve Data Quality for Automated Pavement Distress Data Collection Project Summary Report
    Improve Data Quality for Automated Pavement Distress Data Collection [Project Summary Report]
    Wang, Feng ;
    Luo, Xiaohua
    2024-08-31 | PDF
    The study commenced with a comprehensive review of the existing literature combined with a questionnaire survey that focused on the evaluation of prevailing automated pavement condition data collection techniques. The primary objective was to identify potential strategies for enhancing data quality and operational efficiency, drawing insights from ...
  • Determine the Feasibility and Methodologies of Using Structural Data from the Traffic Speed Deflectometer in Network and ProjectLevel Treatment Decision Making Project Summary Report
    Determine the Feasibility and Methodologies of Using Structural Data from the Traffic Speed Deflectometer in Network- and Project-Level Treatment Decision Making [Project Summary Report]
    Scullion, Tom ;
    Dorsett, Garrett
    2024-08-31 | PDF
    The goals of this project were to analyze and validate TSD data for use at the project and network levels, and to provide recommendations on ways to incorporate TSD data into existing Texas Department of Transportation (TxDOT) pavement management systems. Researchers proposed procedures that use TSD structural data to enhance network- and project-l ...
  • 07139 Determination of Pavement Surface Type
    0-7139: Determination of Pavement Surface Type
    Prozzi, Jorge A. ;
    Sabillon, Christian
    2024-08-31 | PDF
    This study evaluated and developed machine learning models for pavement surface classification to enhance accuracy and reliability using advanced computational techniques. Initially, a detailed literature review on pavement texture and measurement methods provided a foundation for developing a prototype system. This system, integrating laser scanne ...
  • 07161 Develop Settlement Criteria and Design Approach for Embankments and Retaining Walls Built on Compressible Soils
    0-7161: Develop Settlement Criteria and Design Approach for Embankments and Retaining Walls Built on Compressible Soils
    Huang, Jie ;
    Bin-Shafique, Sazzad
    2024-08-31 | PDF
    The overarching objective of this project is to identify settlement criteria for embankments and retaining walls and develop a systematic soil improvement design tool to facilitate the method selection and construction time and cost estimation. There is a consensus that the post-construction settlement has profound impacts on the service conditions ...
  • PostNEVI Electric Vehicle Infrastructure Research Freight Fleet and MultiFamily Housing Project Summary Report
    Post-NEVI Electric Vehicle Infrastructure Research (Freight, Fleet, and Multi-Family Housing) [Project Summary Report]
    Kraus, Edgar ;
    Kuzio, Jacqueline
    2024-08-31 | PDF
    Researchers conducted three stakeholder workshops to assess stakeholder needs and concerns, opportunities for stakeholder coordination, and long-term EV infrastructure strategy considerations. Researchers also conducted interviews with peer states and metropolitan planning organizations. These efforts resulted in the development of a prototype EV c ...
  • Develop Laboratory Mix Design for Full Depth Reclamation FDR Projects Using Foamed Asphalt Binder and Emulsified Asphalt Project Summary Report
    Develop Laboratory Mix Design for Full Depth Reclamation (FDR) Projects Using Foamed Asphalt Binder and Emulsified Asphalt [Project Summary Report]
    Arambula-Mercado, Edith ;
    Sebesta, Stephen
    2024-08-31 | PDF
    The purpose of this research project, conducted by the Texas A&M Transportation Institute, was to update and refine the mix design procedures for FDR to improve consistency, reliability, and performance of rehabilitated pavements. The project aimed to address the gaps and variability in current practices by suggesting certain changes to the standar ...
  • Integrated SiteManager and Pavement Analyst Database on an Online Platform Project Summary Report
    Integrated SiteManager and Pavement Analyst Database on an Online Platform [Project Summary Report]
    Bhasin, Amit ;
    Rahman, Syeda
    2024-08-31 | PDF
    The research team extracted material and project related information from the SMGR and DCIS databases, and pavement surface conditions, distress measures, and locations of all contracted and in-house construction and maintenance projects identified for four-year planning cycles from the Pavement Analyst database. The research team queried, integrat ...
  • 0716801 Support XRF Determination of Tire Rubber Content in Asphalt Binders
    0-7168-01: Support XRF Determination of Tire Rubber Content in Asphalt Binders
    Bhasin, Amit ;
    Filonzi, Angelo
    2024-08-31 | PDF
    This project is a field support extension of Project 0-7168, 'Use of X-Ray Fluorescence (XRF) to Determine Tire Rubber Content in Asphalt Binders.' That project showed that XRF can determine tire rubber content accurately. This project was to provide field support to districts to conduct XRF for tire rubber content in the field and a project site, ...
  • 5704901 Implementation of Improving and Communicating Speed Management Practices Summary
    5-7049-01: Implementation of Improving and Communicating Speed Management Practices [Summary]
    Fitzpatrick, Kay ;
    Venglar, Steven P.
    2024-08-30 | PDF
    Posted speed limits (PSLs) are a highly complex issue involving engineering, human factors, and political and societal concerns. On a national level, recent research along with calls to change how speed limit are set, especially for city streets, have generated extensive discussion on future speed limit setting procedures. Recent Texas Department o ...
  • Pavement Deterioration Models for Pavement Management
    Pavement Deterioration Models for Pavement Management
    Woods, Mark ;
    Alam‐Khan, Shafkat
    2024-08-30 | PDF
    The Vermont Agency of Transportation (VTrans) oversees the ownership and maintenance of an extensive network comprising 3,100 centerline miles of paved public roads. In 2004, VTrans pioneered the development of pavement performance models, utilizing historical pavement performance data categorized by the underlying structure and paving surface trea ...
    Supporting Files
  • Illinois Highway Materials Sustainability Efforts 2023
    Illinois Highway Materials Sustainability Efforts 2023
    Senger, Kelly
    2024-08-28 | PDF
    The Illinois Department of Transportation (IDOT) continues to use a variety of reclaimed and recycled materials in highway construction. Recycled materials are used in highway construction to supplement aggregates, concrete, hot-mix asphalt (HMA), steel, and sealants, as well as for soil modification and pavement markings. This report summarizes th ...
  • Leveraging Mobility Data Analytics to Inform Mobility Hub Development in Florida Project BED31 TWO 97714
    Leveraging Mobility Data Analytics to Inform Mobility Hub Development in Florida Project BED31 TWO 977-14
    Yan, Xiang Jacob ;
    Lyu, Duanya
    2024-08-20 | PDF
    Mobility hubs (MHs) can facilitate seamless transitions between various transportation modes, such as transit, ridehailing, and micromobility, enhancing multimodal travel and delivering socioeconomic benefits. To inform mobility hub planning and development in Florida cities and beyond, this project develops a multi-criteria, GIS-based MH site sele ...
  • Geotechnical Asset Management GAM Phase II Project Capsule 244GT
    Geotechnical Asset Management (GAM) Phase II: Project Capsule [24-4GT]
    Ferguson, Nicholas ;
    Rupnow, Tyson
    2024-08-15 | PDF
    The research objectives for this project can be summarized as follows: 1. Grow Geotechnical Asset Management (GAM) in Louisiana. 2. Build/rebuild a culvert inventory database that will benefit multiple DOTD sections. 3. Establish condition and consequence criteria for culvert risk determinations and maintenance priorities. 4. Develop a roadmap for ...
  • The Effectiveness of Longitudinal Rumble Strips on Indiana Roads
    The Effectiveness of Longitudinal Rumble Strips on Indiana Roads
    Barahona, Mario ;
    Guo, Qiming
    2024-08-15 | PDF
    Rumble strips are designed and deployed to reduce run-off-road and head-on crashes by alerting drivers about near-lane departures. Although they have been widely used, their operational safety effectiveness still needs to be investigated under various operational conditions. Rumble strips may have different widths and be installed on edge, shoulder ...
  • Vermont Smart Growth Vehicle Miles Traveled and Greenhouse Gas Research
    Vermont Smart Growth, Vehicle Miles Traveled, and Greenhouse Gas Research
    Sentoff, Karen ;
    Mansfield, Theodore
    2024-08-12 | PDF
    The Global Warming Solutions Act (GWSA) set targets for Vermont to reduce greenhouse gas (GHG) emissions to 80% below 1990 levels by 2050. Recognizing that transportation accounts for the largest share of the State’s total GHG emissions, the Climate Action Plan identified reduction in vehicle miles traveled (VMT) as a key pathway to meet targets an ...
  • Initiating Seed Production for Effective Establishment of Native Plants on Roadsides in New England
    Initiating Seed Production for Effective Establishment of Native Plants on Roadsides in New England
    Campanelli, John ;
    Kuzovkina, Julia
    2024-08-09 | PDF
    This report provides guidance for the establishment of native habitats in New England. It describes the seed mixes of native plants for various soil conditions, establishment of native habitats using various techniques, guidelines for conservation mowing and ecotypic seed production in the region.
  • Guidelines for Utilization of Field Sands in Superpave Mixtures of Texas
    Guidelines for Utilization of Field Sands in Superpave Mixtures of Texas
    Vaid, Suhail R ;
    Afsha, Sharmila
    2024-08-01 | PDF
    Field sands have been used in hot mix asphalt (HMA) pavements to improve workability since they are readily available and less expensive than crushed materials. However, due to their potential adverse effects on performance, field sands are typically limited to 10% of the aggregates. A key issue is the presence of harmful clay particles that can si ...
    Supporting Files
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