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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 981 - 1000 of 36841 results
  • Monitoring of a SteelReinforced MSE Abutment Wall and Evaluation of its Bearing Capacity Based on the CPT and DCPT Brief
    Monitoring of a Steel-Reinforced MSE Abutment Wall and Evaluation of its Bearing Capacity Based on the CPT and DCPT [Brief]
    Prezzi, Monica ;
    Salgado, Rodrigo
    2025-01-01 | PDF
    A two-span bridge, supported by steel H-piles and mechanically stabilized earth (MSE) bridge abutments, was constructed as part of a new interchange on I-65 in Whitestown, Indiana. The east and west MSE abutment walls consisted of precast concrete facing panels, ribbed steel strips, and coarse-grained backfill soil. A section near the middle of the ...
  • Control Guidelines for Aggregate Drainage Layers and Evaluation of InSitu Permeability Testing Methods for Aggregates Brief
    Control Guidelines for Aggregate Drainage Layers and Evaluation of In-Situ Permeability Testing Methods for Aggregates [Brief]
    Santagata, Maria C. ;
    Becker, Peter J.
    2025-01-01 | PDF
    This project examined the use of the light weight deflectometer (LWD) and the air permeameter test (APT) for control of the state of compaction and hydraulic conductivity of aggregate drainage layers. The investigation included an extensive program of LWDs, APTs, and nuclear density tests on two testing strips constructed at an experimental site—on ...
  • Performance Evaluation of Safe Mobility for Life Coalitions Outreach Activities to Benefit Aging Road Users
    Performance Evaluation of Safe Mobility for Life Coalition’s Outreach Activities to Benefit Aging Road Users
    Alluri, Priyanka ;
    Mdimi, Odilo
    2025-01-01 | PDF
    As Florida’s aging population increases, the demand to ensure safe mobility for older adults also increases, especially since aging road users are vulnerable to serious and fatal crashes. Over 20% of Florida residents are aged 65 or older, and this number is projected to increase by 2045. Age is linked with a decline in vision, cognition, and react ...
  • Evaluation of Mix Design Variables for Full Depth Reclamation FDR with Asphalt
    Evaluation of Mix Design Variables for Full Depth Reclamation (FDR) with Asphalt
    Arambula-Mercado, Edith ;
    Sebesta, Stephen
    2025-01-01 | PDF
    This study on full depth reclamation (FDR) with asphalt binders was aimed at updating FDR mix design procedures for the Texas Department of Transportation’s (TxDOT’s) 2024 Standard Specifications. The study included a literature review, a laboratory factors study, an interlaboratory study, and field evaluations. The literature review examined the u ...
  • Texas Electric Vehicle Charging Infrastructure Readiness Plan
    Texas Electric Vehicle Charging Infrastructure Readiness Plan
    Kraus, Edgar ;
    Kuzio, Jacqueline
    2025-01-01 | PDF
    With the growing adoption of electric vehicles (EVs) in the United States and by Texans, Texas needs adequate and comprehensive coverage of EV charging infrastructure. Although currently comprising slightly more than 1 percent of all registered vehicles in Texas, many projections forecast that EVs could comprise up to 55 percent of all vehicles by ...
  • The Effectiveness of Longitudinal Rumble Strips on Indiana Roads Brief
    The Effectiveness of Longitudinal Rumble Strips on Indiana Roads [Brief]
    Tarko, Andrew P.
    2025-01-01 | 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 ...
  • Assessment of the Mobility Energy Productivity MEP Metric for Transportation Applications in Florida Summary
    Assessment of the Mobility Energy Productivity (MEP) Metric for Transportation Applications in Florida [Summary]
    Matthews, Gabrielle ;
    Jin, Xia
    2025-01-01 | PDF
    The objective of this project was to evaluate the effectiveness of the Mobility Energy Productivity (MEP) metric—a qualitative framework that assesses the quality of mobility in transportation systems when considering accessibility, energy consumption, and productivity—as a tool to provide additional performance measures to enhance decision-making ...
  • Updated Test Procedures
    Updated Test Procedures
    Arambula-Mercado, Edith ;
    Sebesta, Stephen
    2025-01-01 | PDF
    Test procedure to develop a laboratory mixture design for the full depth reclamation (FDR) of roadways using emulsified asphalt (emulsion). This procedure will determine a moisture-density curve, optimum emulsion content, and when necessary, a target additive content based on the indirect tensile (IDT) strength of unconditioned and moisture conditi ...
  • Synthesis Study Review of Durability and Performance of the Latest EpoxyCoated Rebar Summary
    Synthesis Study: Review of Durability and Performance of the Latest Epoxy-Coated Rebar [Summary]
    Ramirez, Julio A.
    2025-01-01 | PDF
    The use of de-icing salts on roads during the winter months has caused corrosion damage to bridge reinforcements, which has increased maintenance costs. The corrosion protection system most widely used by various State Departments of Transportation is a combination of quality concrete, adequate cover, and fusion bonded epoxy-coated reinforcing bars ...
  • Moving Forward Ohio Department of Transportation Research Program Newsletter Fall 2025 Volume 2
    Moving Forward: Ohio Department of Transportation Research Program Newsletter: Fall 2025 Volume 2
    Ohio’s Research Initiative for Locals
    2025-01-01 | PDF
    ODOT’s Research Newsletter is designed to provide practice-ready solutions to real-world issues facing Ohio’s local transportation system through research. It’s a multi-organizational collaborative effort to improve the transportation network in Ohio’s counties, townships, cities and villages.
  • Synthesis Study Review of Durability and Performance of the Latest EpoxyCoated Rebar
    Synthesis Study: Review of Durability and Performance of the Latest Epoxy-Coated Rebar
    Ramirez, Julio A. ;
    Jimenez, Luis A Quesada
    2025-01-01 | PDF
    The use of de-icing salts on roads during the winter months has caused corrosion damage to bridge reinforcements, which has increased maintenance costs. The corrosion protection system most widely used by various State Departments of Transportation is a combination of quality concrete, adequate cover, and fusion bonded epoxy-coated reinforcing bars ...
  • Use of XRay Fluorescence XRF to Determine Tire Rubber Content in Asphalt Binders
    Use of X-Ray Fluorescence (XRF) to Determine Tire Rubber Content in Asphalt Binders
    Bhasin, Amit ;
    Filonzi, Angelo
    2025-01-01 | PDF
    This work involved making a portable X-Ray Fluorescence Spectroscopy device available to district personnel and training them to use the device on a routine basis to analyze tire rubber-modified asphalt binder for tire rubber content. The Performing Agency worked with the Receiving Agency and producers from around the state to develop calibration s ...
  • Updating Rainfall Zones and Intensities in Nebraska for Improved Design of Nonbridgesized Drainage Structures
    Updating Rainfall Zones and Intensities in Nebraska for Improved Design of Non-bridge-sized Drainage Structures
    Mahmood, Rezaul ;
    Roy, Tirthankar
    2025-01-01 | PDF
    This study assesses the effectiveness of precipitation zones and Intensity-Duration-Frequency (IDF) curves used by the Nebraska Department of Transportation (NDOT) for designing drainage structures. Twenty stations were selected for the analysis of revised IDF curves out of forty-two stations. Datasets have been considered from the National Center ...
  • Stone Matrix Asphalt SMA Overlay Performance Evaluation Brief
    Stone Matrix Asphalt (SMA) Overlay Performance Evaluation [Brief]
    Lee, Jusang M ;
    Haddock, John E.
    2025-01-01 | PDF
    Stone matrix asphalt (SMA) is a specialized asphalt mixture designed to improve pavement performance by combining a coarse aggregate skeleton with a high-binder content mortar. This innovative design, adopted by the Indiana Department of Transportation (INDOT) in the late 1990s, offers distinct advantages over conventional hot mix asphalt (HMA). Cu ...
  • Evaluation of Recycled Plastic Modified Asphalt Mixtures and Pavements Phase I A Case Study in Virginia
    Evaluation of Recycled Plastic Modified Asphalt Mixtures and Pavements: Phase I - A Case Study in Virginia
    Habbouche, Jhony ;
    Lloyd, Lewis N.
    2025-01-01 | PDF
    The purpose of this study was to assess recycled plastic-modified (RPM) asphalt mixtures field trials constructed in Virginia. This study documented and evaluated the constructability and laboratory performance of two plant-produced RPM mixtures compared with the Virginia Department of Transportation (VDOT) typical D and E surface mixtures as refer ...
    Supporting Files
  • Environment for Testing and Assessing Infrastructure Support of Connected Vehicle and Cooperative Highway Automation Summary
    Environment for Testing and Assessing Infrastructure Support of Connected Vehicle and Cooperative Highway Automation [Summary]
    Ponnaluri, Raj ;
    Hadi, Mohammed
    2025-01-01 | PDF
    The primary goal of this project was to provide recommendations on incorporating CDA into FDOT’s Transportation System Management and Operations (TSM&O). Specific objectives included developing a Concept of Operations (ConOps) for incorporating CDA features in traffic management; formulating methods to test and evaluate infrastructure support for C ...
  • Implementation of Balanced Mixture Design in Missouri Test Sections with Modifiers
    Implementation of Balanced Mixture Design in Missouri Test Sections with Modifiers
    Buttlar, William G. ;
    Rath, Punyaslok
    2025-01-01 | PDF
    The overarching goal of this study was to advance the deployment of innovative pavement technologies prevalent in the state of Missouri. In this study, the focus was on evaluating recycled polymers for use in asphalt mixtures and Balanced Mixture Design (BMD) implementation. Nine test sections were constructed on I-155 near Hayti, MO. Six sections ...
  • A Study of Suburban Arterial Safety Performance Based on Median Type Brief
    A Study of Suburban Arterial Safety Performance Based on Median Type [Brief]
    Tarko, Andrew P. ;
    Romero, Mario A.
    2025-01-01 | PDF
    Suburban arterial roadways must serve two conflicting road functions: regional mobility and access to the abutting land. The potential for conflicts between traffic passing through and traffic accessing road from the neighboring areas could raise safety concerns. Selecting an adequate cross-section is among important decisions that road designers a ...
  • Beneficial Use of Iowa Waste Ashes in Concrete through Carbon Sequestration
    Beneficial Use of Iowa Waste Ashes in Concrete through Carbon Sequestration
    Wang, Kejin ;
    Lee, Yunsu
    2025-01-01 | PDF
    A significant amount of waste ash in the United States does not meet the necessary specifications for construction and other uses, and power plants are searching for a way to dispose of surplus waste ashes. To address this issue, this research aimed to treat waste ashes using CO2 injection in order to modify their properties and enable their benefi ...
  • Wireless Charging Revenue Generation from Kansas Pavements
    Wireless Charging Revenue Generation from Kansas Pavements
    Aziz, H.M. Abdul
    2025-01-01 | PDF
    In addition to the expected environmental and energy security related benefits, however, high EV adoption raises concerns about the negative impact on revenue generation that has previously come from the gasoline tax. The Highway Trust Fund (HTF) has been challenged repeatedly for future sustenance, including declining gas tax revenue as consumers ...
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