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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 941 - 960 of 36841 results
  • Testing the Hurricane Evacuation Modeling Package HEMP
    Testing the Hurricane Evacuation Modeling Package (HEMP)
    Bian, Ruijie “Rebecca”
    2025-02-01 | PDF
    This project studied if and how behavioral models and traffic simulation frameworks created beforehand could be used to predict hurricane evacuation patterns in a new storm setting, with the anticipation of being able to conduct a real-time simulation in the future. Using publicly available data, this study first created synthetic populations by ye ...
  • Testing the Hurricane Evacuation Modeling Package HEMP Summary
    Testing the Hurricane Evacuation Modeling Package (HEMP) [Summary]
    Bian, Ruijie “Rebecca” ;
    Mitran, Elisabeta
    2025-02-01 | PDF
    This project studied if and how behavioral models and traffic simulation frameworks created beforehand could be used to predict hurricane evacuation patterns in a new storm setting, with the anticipation of being able to conduct a real-time simulation in the future. Using publicly available data, this study first created synthetic populations by ye ...
  • Safety Performance of NonSignalized Traffic Control Strategies Brief
    Safety Performance of Non-Signalized Traffic Control Strategies [Brief]
    Tarko, Andrew P. ;
    Romero, Mario A.
    2025-02-01 | PDF
    The Indiana safety management program targets the reduction of crashes at high-speed, two-way stop-controlled (TWSC) intersections, which are responsible for 8.2% of serious crashes statewide that cause approximately 1,000 serious injuries and over 90 fatalities annually. Key risk factors include human error, high traffic volumes, and high speeds. ...
  • Safety Performance of NonSignalized Traffic Control Strategies
    Safety Performance of Non-Signalized Traffic Control Strategies
    Tarko, Andrew P. ;
    Romero, Mario A.
    2025-02-01 | PDF
    The Indiana safety management program targets the reduction of crashes at high-speed, two-way stop-controlled (TWSC) intersections, which are responsible for 8.2% of serious crashes statewide that cause approximately 1,000 serious injuries and over 90 fatalities annually. Key risk factors include human error, high traffic volumes, and high speeds. ...
  • TR808 A Sustainable AirEntraining and Internal Curing Agent
    TR-808: A Sustainable Air-Entraining and Internal Curing Agent
    Yellavajjala, Ravi Kiran ;
    Jalal, Asif
    2025-02-01 | PDF
    Air entrainment of concrete is crucial to dissipate the tensile stresses introduced by the volume expansion of frozen water in the capillary pores of the concrete. The air void system achieved using popular surfactants is sensitive to the properties of cementitious materials, water content, admixtures, aggregate, etc. Furthermore, vibration, compac ...
  • Assessing the Deterioration of Pedestrian Assets
    Assessing the Deterioration of Pedestrian Assets
    Nlenanya, Inya ;
    Smadi, Omar G.
    2025-02-01 | PDF
    Pedestrian assets, particularly sidewalks, are highly susceptible to aging, adverse weather conditions, and suboptimal construction practices, often leading to rapid deterioration. This deterioration is often ignored due to the widespread misconception that pedestrian assets are low risk, resulting in many deteriorated sidewalks being left untreate ...
  • Current Practices in Rock Scaling
    Current Practices in Rock Scaling
    Greer, Daryl J. ;
    Ashurst Jr, Kean H.
    2025-02-01 | PDF
    Rockfalls, which result from the chemical and physical weathering of aging exposed rock cuts, occur frequently along many Kentucky roadways and can endanger travelers. Mitigating rockfalls often requires substantial excavation, procuring additional right of way, and/or hiring specialty contractors. An alternative to these expensive processes is roc ...
  • Organization and Analysis of Measurement While Drilling MWD Data
    Organization and Analysis of Measurement While Drilling (MWD) Data
    Link, Curtis A ;
    Barrick, David J.
    2025-02-01 | PDF
    The scope of the MDT funded research project highlighted collection and organization of data onto a portal, data review and quality control and analysis of relationships between MWD drilling parameters and rock properties. Our initial approach was investigation of traditional linear correlations between individual MWD drilling parameters and rock p ...
  • Development of Procedures and Technologies for Chip Seal Construction Quality Control in Oregon
    Development of Procedures and Technologies for Chip Seal Construction Quality Control in Oregon
    Baran, Servan ;
    Sukhija, Mayank
    2025-02-01 | PDF
    Given budget constraints and increasing traffic in Oregon, chip seals have emerged as a cost-effective and practical approach for maintaining and preserving the existing highway network. This study focused on establishing efficient Quality Assurance (QA) procedures for chip seals, aligning with SPR777's design method to increase the performance and ...
  • Laboratory and Field Performance of PGXX28 and PGXX34 Binders and New Binder Type Selection Catalog
    Laboratory and Field Performance of PGXX-28 and PGXX-34 Binders and New Binder Type Selection Catalog
    Hu, Sheng ;
    Zhou, Fujie
    2025-02-01 | PDF
    Asphalt binder is one of the most expensive and critical materials used in the construction and maintenance of asphalt pavements. A key step toward a long-lasting asphalt pavement is selecting a proper binder performance grade (PG). The Texas Department of Transportation’s current binder PG selection catalog serves its purpose well for new pavement ...
  • Investigation of Commercial Motor Vehicle CMVRelated Crashes in Ohio Work Zones
    Investigation of Commercial Motor Vehicle (CMV)-Related Crashes in Ohio Work Zones
    Finley, Melisa D. ;
    Lopez, Nicholas
    2025-02-01 | PDF
    This research project was conducted to identify causation trends and factors that contribute to commercial motor vehicle (CMV)-involved work zone crashes in Ohio. In addition, the research project examined how workspace access points contribute to the CMV crash risk in work zones. In Phase 1, the research team reviewed previous research findings, c ...
  • Capturing Transit Rider Perspectives on Safety and Harassment Lessons from San Francisco
    Capturing Transit Rider Perspectives on Safety and Harassment: Lessons from San Francisco
    Wasserman, Jacob L. ;
    Brozen, Madeline
    2025-02-01 | PDF
    Personal safety concerns continue to be one of the most critical issues among transit riders and women and gender minorities in particular. These safety concerns stem from the experience of sexual harassment that people who identify as women face frequently. While harassment can be a common occurrence, the vast majority of these experiences go unre ...
  • HighSpeed Faulting Measuring Device for Jointed Concrete Pavements
    High-Speed Faulting Measuring Device for Jointed Concrete Pavements
    Li, Ruohan ;
    Hernandez, Joaquin B.
    2025-02-01 | PDF
    Current equipment to measure faulting of jointed concrete pavements at the network level is ineffective and inefficient. One the one hand, joint detection at high speeds is challenging. On the other hand, the actual measurement is not accurate and fails to capture the transverse variability of faulting. In this project, a high- definition, high-spe ...
  • FiberReinforced Concrete Overlays for Bridge Structures
    Fiber-Reinforced Concrete Overlays for Bridge Structures
    Ozyildirim, H. Celik ;
    Sharifi, Mary
    2025-02-01 | PDF
    The common distresses in bridge decks are the loss of surface texture due to traffic and poor construction practices that result in cracks and spalls because of the reinforcement corroding. The common repair procedure for such distresses is removing the top surface of the deteriorated concrete and placing a low-permeability concrete overlay. Someti ...
  • Suitability of Using Crushed Concrete Adjacent to Geotextiles in Underdrain Systems Second Phase Field Trial Before Implementation
    Suitability of Using Crushed Concrete Adjacent to Geotextiles in Underdrain Systems Second Phase: Field Trial Before Implementation
    Tanyu, Burak F ;
    Abbaspour, Aiyoub
    2025-02-01 | PDF
    Due to the increasing interest in the use of recycled concrete as a base course aggregate, the Virginia Department of Transportation (VDOT) identified the need for an in-depth research investigate the clogging potential of the geotextile used in highway edge drains if crushed hydraulic cement concrete (CHCC) is placed adjacent to the drainage fabri ...
  • A Roadmap for Missouri Assessing Needs an Implementation Framework for Incorporating Environmental Product Declarations Summary
    A Roadmap for Missouri: Assessing Needs an Implementation Framework for Incorporating Environmental Product Declarations [Summary]
    Kevern, John T. ;
    Buttlar, William G.
    2025-02-01 | PDF
    This report details the Missouri Department of Transportation’s activities within the Federal Highway Administration’s Climate Challenge program. The purpose of the program was three-fold, 1) to increase knowledge of environmental product declarations (EPDs) within the Missouri asphalt and concrete industry, 2) to assess the current state of Missou ...
  • Design and Demonstration of an ArterialFriendly Local Ramp Metering Control System Research Summary
    Design and Demonstration of an Arterial-Friendly Local Ramp Metering Control System [Research Summary]
    Liu, Yi
    2025-02-01 | PDF
    This project aims to develop, assess, and optimize control strategies for ramp metering and local signal synchronization in Maryland's Transportation Systems Management and Operations (TSMO) 1 system (I-70 corridor east of Baltimore, MD). The methodology and mesoscopic simulation model can be generally applicable to other networks and TSMO systems.
  • Project Summary Community Driven CAV
    Project Summary: Community Driven CAV
    Minnesota. Department of Transportation
    2025-02-01 | PDF
    We envisioned a project—a future—where the community is at the forefront of planning and implementation of new technology. Technologies are often developed by select companies and universities, and then tested in communities. Instead of leading with a solution, Community Driven CAV started by understanding community needs and assets, and then creat ...
  • Utah Travel Models FreeFlow Speed Research
    Utah Travel Models Free-Flow Speed Research
    Hooper, Ivan ;
    Bassett, David
    2025-02-01 | PDF
    Utah’s six travel demand models (TDM) are essential tools for the state’s transportation planning. Virtually every transportation plan and environmental study uses the TDMs to develop and evaluate transportation solutions, making the TDMs the most important transportation planning tool in the state. Currently, all of the TDMs employ a similar metho ...
  • Evaluation of Alabama Limestone Sources for Use as Pavement Aggregate Base
    Evaluation of Alabama Limestone Sources for Use as Pavement Aggregate Base
    Bowers, Benjamin F. ;
    Anderson, J Brian
    2025-02-01 | PDF
    In recent years, the number of requests for approval of locally mined lime rock in Alabama has increased due to potential economic benefits associated with its use. However, the potential moisture sensitivity of lime rock is a concern that has not been fully addressed as it can impact the long-term performance of pavements. The objective of this st ...
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