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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 36114 results
  • 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 ...
  • Division of Planning Research OnCall ROC Task12 Survey of Risk Management Policies for Transportation Agencies
    Division of Planning Research On-Call (ROC) Task#12 - Survey of Risk Management Policies for Transportation Agencies
    Aros-Vera, Felipe
    2023-03-01 | PDF
    The project and risk management policies and strategies used by other DOTs in the country were evaluated. The purpose is to gain insight into how they measure and manage project development and delivery, and ultimately obtain ideas to improve ODOT’s own project management methods.
  • Improving and Expanding the Queue Warning System
    Improving and Expanding the Queue Warning System
    Hourdos, John
    2023-03-01 | PDF
    In previous research, investigators developed and deployed two warning systems, including MN-QWARN, which was installed on a segment of Interstate 94 (I-94) with a historically high crash rate. This system targeted shockwaves or initial stages of congestion based on the understanding that not all congestion events create high risks for crashes. Cer ...
  • Offline and Realtime Evaluations of EasternShore Sensors With a Generalized Detection Performance Monitoring System
    Off-line and Real-time Evaluations of Eastern-Shore Sensors With a Generalized Detection Performance Monitoring System
    Lin, Yi-Ting ;
    Chen, Yen-Hsiang
    2023-03-01 | PDF
    The primary objectives of this study are to develop a detector performance monitoring system for both off-line and on-line applications, and to implement such a system for the Eastern Shore region’s current and proposed sensors, including: evaluate the data quality and reliability of the six sensors deployed in the Eastern Shore region; assess the ...
  • Evaluate and Develop PostConstruction Groundcover That Meets Erosion and Sediment Goals and Is Beneficial to Pollinators Fact Sheet
    Evaluate and Develop Post-Construction Groundcover That Meets Erosion and Sediment Goals and Is Beneficial to Pollinators [Fact Sheet]
    Burns, Ana ;
    Daniels, Cheryl
    2023-03-01 | PDF
    The Ohio Department of Transportation (ODOT) is constantly looking for ways to reduce maintenance costs following construction using native seed mixes while ensuring all Stormwater Pollution Prevention Plan (SWPPP) requirements are met. Davey Resource Group “DRG” was contracted by ODOT to develop seed mixes for various habitats and research appropr ...
  • Evaluation of Coefficients Related to Runoff from Roadway Projects Technical Brief
    Evaluation of Coefficients Related to Runoff from Roadway Projects [Technical Brief]
    Guo, Qizhong (George) ;
    Miskewitz, Robert
    2023-03-01 | PDF
    The objective of this research project was to develop new curve numbers for four land treatments, bare soil, gravel, vegetation, and porous HMA, on top of subsoils with a series of hydraulic conductivities, typical of NJDOT highway projects.
  • UHPC Decked Ibeam for Accelerated Bridge Construction
    UHPC Decked I-beam for Accelerated Bridge Construction
    Morcous, George ;
    Tadros, Maher K.
    2023-03-01 | PDF
    Ultra-High-Performance Concrete (UHPC) is an excellent material for bridge construction due to its exceptional durability and superior mechanical properties. Several Departments of Transportations (DOTs), including NDOT, have limited the use of UHPC in bridge construction to joints and connections between bridge components due to the relatively hig ...
  • Ecological Design Rules for Roadway Lighting
    Ecological Design Rules for Roadway Lighting
    Sulliván, Mažeika Patricio ;
    Gray, Suzanne M
    2023-03-01 | PDF
    Artificial lighting at night alters natural patterns of light and dark in ecosystems and includes chronic or periodic illumination, unexpected changes in lighting, and direct glare that can have serious implications for ecological systems, such that it is increasingly referred to as “ecological light pollution”. ALAN occurs at an extent and magnitu ...
  • Statewide Capital Investment Strategy and Update Technical Brief
    Statewide Capital Investment Strategy and Update [Technical Brief]
    Patel, Alpesh ;
    Ukpah, Priscilla
    2023-03-01 | PDF
    The goal of this research is to complete the following objectives: • Inventory relevant transportation investment plans for New Jersey, including capital programs for NJDOT, NJ TRANSIT, NJTA and SJTA. • Coordinate amongst all SCIS stakeholders, including key collaborators at NJDOT, NJTA, SJTA and NJ Transit. • Draft an SCIS document that meets all ...
  • Alternative Transit Approaches for Rural Communities
    Alternative Transit Approaches for Rural Communities
    Fisher, Thomas
    2023-03-01 | PDF
    Innovative or nontraditional transportation programs and platforms have emerged for rural communities, largely fueled by digital technology. Public-private partnerships, car- or bike-shar?ing, and other local networks offer promising solutions to meet rural transit needs more equitably and efficiently. In addition to benefiting underserved populati ...
  • Performance of Concrete Overlays over Full Depth Reclamation
    Performance of Concrete Overlays over Full Depth Reclamation
    King, Daniel ;
    Akakin, Tumer
    2023-03-01 | PDF
    Concrete overlays of full depth reclamation (FDR) are a pavement rehabilitation option involving reclamation of existing pavement layers while providing a new concrete surface to the roadway. This report reviewed nine concrete overlays of FDR that have been constructed in three states since 2006. Design and construction details were collected for e ...
  • Annulus Void Fill Material for Rehabilitated Sliplined Culverts
    Annulus Void Fill Material for Rehabilitated Sliplined Culverts
    Patnaik, Anil ;
    Alzlfawi, Abdullah
    2023-03-01 | PDF
    Sliplining is a method used by transportation agencies to rehabilitate deteriorated culverts. In recent years, ODOT discovered a number of sliplined culverts that did not have their annulus void spaces completely filled. Such culverts experience distortion and settlement as well as reduced structural capacity. Field inspections of several sliplined ...
  • Evaluate Replacement of Current PostConstruction Groundcover with Pollinator Beneficial Groundcover
    Evaluate Replacement of Current Post-Construction Groundcover with Pollinator Beneficial Groundcover
    Burns, Ana ;
    Daniels, Cheryl
    2023-03-01 | PDF
    The Ohio Department of Transportation (ODOT) is constantly looking for ways to reduce maintenance costs following construction using native seed mixes while ensuring all Stormwater Pollution Prevention Plan (SWPPP) requirements are met. Davey Resource Group “DRG” was contracted by ODOT to develop seed mixes for various habitats and research appropr ...
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