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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 2161 - 2180 of 36151 results
  • US Department of Transportation Capacity Assessment
    U.S. Department of Transportation Capacity Assessment
    United States. Department of Transportation  ...
    2023-03-01 | PDF
    In accordance with the Foundations for Evidence-Based Policymaking Act of 2018, Public Law No. 115-435 (Evidence Act), the United States Department of Transportation (DOT or the Department) is pleased to present the Capacity Assessment. The following report assesses DOT’s research, statistics, and evaluation capabilities based on a number of criter ...
  • CostBenefit Analysis of FuelEfficient Speed Control Using Signal Phasing and Timing SPaT Data Evaluation for Future Connected Corridor Deployment
    Cost/Benefit Analysis of Fuel-Efficient Speed Control Using Signal Phasing and Timing (SPaT) Data: Evaluation for Future Connected Corridor Deployment
    Levin, Michael W. ;
    Sun, Zongxuan
    2023-03-01 | PDF
    The objective of this methodology is to refine the preliminary results from previous work (11% fuel savings for one vehicle, one intersection) to an entire corridor of SPaT signals, with different CV market penetration, and with driver awareness of fuel savings benefits. The research will proceed in three parts. First, several vehicles will be inst ...
  • Implementation of Laboratory Conditioning and Testing Protocol to Evaluate Moisture Susceptibility of Asphalt Mixtures
    Implementation of Laboratory Conditioning and Testing Protocol to Evaluate Moisture Susceptibility of Asphalt Mixtures
    Coleri, Erdem ;
    Kumar, Vikas
    2023-03-01 | PDF
    Moisture damage in asphalt mixtures can cause early cracking and rutting failures due to the internal damage accumulated by the high internal pore pressures created at the aggregate-binder interface and/or within the binder phase by heavy traffic loads. Due to the high precipitation levels and frequent rain events, distresses originating from moist ...
  • Pavement Structural Analysis Tool PSAT for Iowa Local Roads
    Pavement Structural Analysis Tool (PSAT) for Iowa Local Roads
    Citir, Nazik ;
    Ceylan, Halil
    2023-03-01 | PDF
    Iowa has three classes of public roads: state primary highways, county (secondary) roads, and city streets. Among these, Iowa county roads serve rural Iowa transport needs by assuring a public road connection (i.e., to local access roads) for serving as conduits that channel the flow of people and commodities to and from towns and terminals (i.e., ...
  • Development of Pavement Structural Analysis Tool PSAT for Iowa Local Roads Summary
    Development of Pavement Structural Analysis Tool (PSAT) for Iowa Local Roads [Summary]
    Ceylan, Halil ;
    Kim, Sunghwan
    2023-03-01 | PDF
    This study developed a user-friendly tool that allows local agencies to understand the current structural capacities of their pavement assets, prioritize their preservation and rehabilitation needs, and make better-informed pavement infrastructure decisions.
  • 2022 Maryland Commuter Survey
    2022 Maryland Commuter Survey
    Harvey, Chester ;
    Shokputov, Alibi
    2023-03-01 | PDF
    The Maryland Commuter Survey (MCS) is a new survey of adult workers in Maryland designed to measure annual trends in commuting and remote work. The 2022 MCS is its first iteration, providing baseline understanding of commuting rates and patterns as Maryland exits the COVID-19 pandemic. This survey and future iterations will shed light on topics inc ...
  • Express Lane Marker Color Human Factors Study on Concrete and OpenGraded Friction Course Summary
    Express Lane Marker Color Human Factors Study on Concrete and Open-Graded Friction Course [Summary]
    Byram, Karen ;
    Ali, Hesham
    2023-03-01 | PDF
    The objectives of this research project were to test the visibility and recognition of ELMs with different color patterns and to conduct a performance test of the ELMs on an OGFC surface. This project also developed recommendations and specifications for ELMs on OGFC surfaces.
  • Optimizing the Performance of Item 404Low Volume Traffic Mixes Fact Sheet
    Optimizing the Performance of Item 404-Low Volume Traffic Mixes [Fact Sheet]
    Abbas, Ala R. ;
    Nazzal, Munir
    2023-03-01 | PDF
    This research project involved the following: • Online survey: An online survey was conducted in this study to document the current state-of-the-practice by Ohio LPAs regarding the use of 404LVT asphalt mix design specifications. • Laboratory study: A laboratory testing plan was designed and implemented in this study to examine the effects of vario ...
  • Optimizing the Performance of Item 404Low Volume Traffic Mixes
    Optimizing the Performance of Item 404-Low Volume Traffic Mixes
    Abbas, Ala R. ;
    Nazzal, Munir
    2023-03-01 | PDF
    Most local public agencies (LPAs) in Ohio follow the Ohio Department of Transportation (ODOT) specifications for designing asphalt mixtures placed on low‐volume roads, with the majority of these agencies using Type 1 surface mixes prepared using PG 64‐22 asphalt binders. As an alternative, some LPAs use a mix known as 404LVT, which is a fine-graded ...
  • Inlet Protection Comparison for Sediment Control on Roadway Construction Fact Sheet
    Inlet Protection Comparison for Sediment Control on Roadway Construction [Fact Sheet]
    Tangirala, Anil ;
    Kerns, Justin
    2023-03-01 | PDF
    The Inlet Protection Comparison for Sediment Control on Roadway Construction research project intends to provide Ohio Department of Transportation (ODOT) with performance data associated with key criteria for manufactured inlet protection devices in order to assess which products are appropriate for inlet sediment controls on ODOT roadway construct ...
  • Characterizing Strength Loss in High Plasticity Clays along Alabama Highways
    Characterizing Strength Loss in High Plasticity Clays along Alabama Highways
    Xuan, Mengwei ;
    Montgomery, Jack
    2023-03-01 | PDF
    Strength loss in high plasticity clay soils is a common occurrence along roadways in western and central Alabama and has considerable impact on pavement distress and slope failures. Approximately $16 million was spent to repair slope failures in western and central Alabama between 2005 and 2015 with many of these failures occurring in areas with hi ...
  • Domestic Airline Fares Consumer Report First Quarter 2006 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: First Quarter 2006 Passenger and Fare Information
    United States. Department of Transportation
    2023-03-01 | PDF
    Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric ...
  • Using Signal Phasing and Timing Data to Reduce Fuel Use Technical Summary
    Using Signal Phasing and Timing Data to Reduce Fuel Use [Technical Summary]
    Rowe, Daniel ;
    Levin, Michael W.
    2023-03-01 | PDF
    The goal of this project was to explore the fuel efficiencies of SPaT broadcasts interacting with CVs to control speed along connected corridors. The findings from this investigation could then be used to inform possible future SPaT deployments.
  • District Highway Maintenance Research OnCall ROC 202309 Task 1 Evaluation of the Use Robotic Systems for Improving Crack Sealing Process
    District Highway Maintenance Research On-Call (ROC) 2023-09- Task 1: Evaluation of the Use Robotic Systems for Improving Crack Sealing Process
    Nazzal, Munir D ;
    Abbas, Ala R.
    2023-03-01 | PDF
    This report summarizes the results of a research task that was conducted to document the Ohio Department of Transportation (ODOT) current state-of-the-practice for crack sealing, identify best practices used or researched by state DOTs for crack sealing, and identify new methods and equipment for crack sealing that can improve the efficiency, respo ...
  • Evaluating the Safety Impacts of Flashing Yellow Permissive LeftTurn Indications in Massachusetts ApproachLevel Analysis
    Evaluating the Safety Impacts of Flashing Yellow Permissive Left-Turn Indications in Massachusetts: Approach-Level Analysis
    Tainter, Francis ;
    Fitzpatrick, Cole
    2023-03-01 | PDF
    Given the novelty of the Flashing Yellow Arrow (FYA) in Massachusetts, this research study provides MassDOT with a greater understanding of their impacts from an approach-level perspective. More so, this study provides the agency with a holistic overview of infrastructure and operational impacts at each of these intersections, ultimately leading to ...
  • Methods for Increasing Missouris Passenger Rail Business Revenues
    Methods for Increasing Missouri’s Passenger Rail Business Revenues
    Waldt, Peter ;
    Atallah, Stephanie
    2023-03-01 | PDF
    This research identifies opportunities to enhance revenue including yield management, creative fare schemes and campaigns, partnerships attractions and institutions. As part of this effort, the authors interviewed overseas rail operators to provide examples of revenue enhancement as well as operators such as Brightline and Amtrak to identify exampl ...
  • Statewide Capital Investment Strategy and Update
    Statewide Capital Investment Strategy and Update
    Patel, Alpesh ;
    Ukpah, Priscilla
    2023-03-01 | PDF
    This research is focused on updating the New Jersey Department of Transportation (NJDOT) Statewide Capital Investment Strategy (SCIS), which outlines NJDOT’s strategy to comprehensively invest in deficiencies and improvements to address statewide system goals. The update of the SCIS is a requirement under the Transportation Trust Fund Authority Act ...
  • Pilot Design Build Program Evaluation Research Brief
    Pilot Design Build Program Evaluation [Research Brief]
    Qin, Xiao ;
    Gottlieb, Mark
    2023-03-01 | PDF
    Historically, apart from a very limited number of specifically authorized exceptions, WisDOT has been required to utilize the design-bid-build method of project delivery. Over the years, several studies have been undertaken, and proposals made, to expand the department’s authority to utilize alternative methods of project delivery, including design ...
  • Updating 2019 Safe Corridors Reports Technical Brief
    Updating 2019 Safe Corridors Reports [Technical Brief]
    Hopwood, Cory ;
    Motamed, Megan
    2023-03-01 | PDF
    The goal of the Safe Corridor Program is to identify corridors with high rates of serious and fatal injury crashes and reduce these crashes in the short-term through the use enforcement and engineering. Both components contribute to the goal of reducing serious injury crashes by encouraging drivers to change poor behaviors within safety corridors a ...
  • Evaluation of Level 34 Intelligent Compaction Measurement Values ICMV for Soils Subgrade and Aggregate Subbase Compaction
    Evaluation of Level 3-4 Intelligent Compaction Measurement Values (ICMV) for Soils Subgrade and Aggregate Subbase Compaction
    Chang, George K ;
    TaghaviGhalesari, Abbas
    2023-03-01 | PDF
    Intelligent compaction (IC) is a roller-based innovative technology that provides real-time compaction monitoring and control. IC can monitor roller passes, vibration frequencies/amplitudes, and stiffness-related values of compacted materials or intelligent compaction measurement Values (ICMV). Various ICMVs have been introduced since 1978. Based o ...
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