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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 541 - 560 of 35440 results
  • Project Summary Centralized SPaT and MAP Data Sharing
    Project Summary: Centralized SPaT and MAP Data Sharing
    Minnesota. Department of Transportation. Research Services & Library
    2024-11-20 | PDF
    The project assessed MnDOT's ability to share signal phasing and timing (SPaT) data and intersection geometry (MAP) data to travelers and third-party systems via a centralized process.
  • Project Summary Rochester Automated Shuttle Pilot Med City Mover
    Project Summary: Rochester Automated Shuttle Pilot: Med City Mover
    Minnesota Department of Transportation  ...
    2024-11-20 | PDF
    The Rochester Automated Shuttle Pilot was a research project that included the 12-month demonstration (August 2021 - August 2022) of two highly automated and electric vehicles to over 3,000 passengers along a fixed route downtown in the City of Rochester. The circular, fixed route connected the Mayo Clinic downtown campus with residential neighborh ...
  • Project Summary Automated Waze Imports
    Project Summary: Automated Waze Imports
    Minnesota Department of Transportation  ...
    2024-11-20 | PDF
    Waze offered a traffic data feed to government transportation agencies, which included alerts (citizen alerts of traffic delays, construction, accidents, etc.) and jams (slowdown information created algorithmically by the Waze platform). The Automated Waze Imports task consisted of several components: • Customized and deployed a Waze alerts importe ...
  • Project Summary Connected Vehicle Traveler Alert System
    Project Summary: Connected Vehicle Traveler Alert System
    Minnesota. Department of Transportation  ...
    2024-11-20 | PDF
    The Connected Vehicle Traveler Alert System project was implemented to increase traveler awareness and subsequently increase safety of the traveling public by notifying them of upcoming maintenance vehicles or snowplows that may not have been in the line of sight. This was tested by sending maintenance vehicle location data gathered by an automatic ...
  • Project Summary Dynamic Flashing Yellow Arrow Phase Mode Selection
    Project Summary: Dynamic Flashing Yellow Arrow Phase Mode Selection
    SRF Consulting Group
    2024-11-20 | PDF
    This project focused on utilizing high-resolution signal data, crash data, and volume data to analyze safety impacts associated with the three left turn phasing modes that flashing yellow arrows could operate in and determine when the various modes should operate. The three modes were as follows: Protected only; Protected-permissive; Permissive onl ...
  • Smart Snelling Summary
    Smart Snelling [Summary]
    Minnesota. Department of Transportation
    2024-11-20 | PDF
    The Smart Snelling project was comprised of two main components: testing a third-party application to provide users signal phasing and timing (SPaT) information and testing snowplow signal priority. Minnesota Department of Transportation (MnDOT) and Minnesota's Ramsey County installed connected vehicle technology equipment at 16 intersections owned ...
  • Project Summary MnDOT Autonomous Bus Pilot
    Project Summary: MnDOT Autonomous Bus Pilot
    Minnesota. Department of Transportation. Research Services & Library
    2024-11-20 | PDF
    The MnDOT Autonomous Bus Pilot project consisted of deploying a Level 4 shuttle provided by EasyMile on the MnROAD facility. The bus was used for several rounds of public demonstrations as well as testing at the MnROAD facility during winter conditions. The bus could hold up to 12 people and had a range of typical driving speeds from 2 to 11 miles ...
  • Project Summary Work Zone Data Exchange WZDx CARS eXchange
    Project Summary: Work Zone Data Exchange (WZDx): CARS eXchange
    Minnesota. Department of Transportation  ...
    2024-11-19 | PDF
    The Condition Acquisition and Reporting System (CARS) eXchange project was put in place to support the Federal Highway Administration’s (FHWA) goal of increasing safety for the traveling public by sharing real-time work-zone information between the public and private sectors, under an FHWA grant. The project objective was to advance Minnesota Depar ...
  • Project Summary Passive Pedestrian Detection Analysis
    Project Summary: Passive Pedestrian Detection Analysis
    SRF Consulting Group
    2024-11-14 | PDF
    The Passive Pedestrian Detection Analysis project reviewed a variety of commercially available passive detection systems. After vendor selection, the project went through ground-truth testing, pushbutton compliance testing, and vendor result summarization. The objective of the project was to test and verify the accuracy of the selected passive dete ...
  • Evaluating the Correlation between Slip Resistance and Skid Resistance of Pavement Markings at Crosswalks
    Evaluating the Correlation between Slip Resistance and Skid Resistance of Pavement Markings at Crosswalks
    Goulias, Dimitrios ;
    Aljarrah, Osama
    2024-11-08 | PDF
    Pavement markings are crucial for ensuring the safe and efficient movement of vehicles, cyclists and pedestrians at crosswalks. They provide essential guidance in lane navigation, road sharing, and safety compliance. With growing emphasis on safety in urban areas, crosswalk markings are becoming more prevalent. The primary objectives of this projec ...
  • Effect of Antioxidant Additives and Recycling Agents on Performance of Asphalt Binders and Mixtures Phase II
    Effect of Antioxidant Additives and Recycling Agents on Performance of Asphalt Binders and Mixtures – Phase II
    Bastola, Nitish R ;
    Ahmed, Muhammad
    2024-11-01 | PDF
    The use of reclaimed asphalt pavement (RAP) in combination with recycling agents (RAs) (i.e., rejuvenators or softening agents) has gained significant attention from the pavement industry as a sustainable pavement solution, reducing the carbon footprint of manufactured products through the conservation of energy and reduction on the use of raw mate ...
  • NHTSA TireRelated Surveys Results and Implications
    NHTSA Tire-Related Surveys: Results and Implications
    Kindelberger, John C
    2024-11-01 | National Transportation Statistics (NTS) | PDF
    Low tire pressure has been shown to be an issue of safety and of fuel economy. Federal Motor Vehicle Safety Standard No. 138 required a tire pressure monitoring system (TPMS) in most passenger vehicles with a gross vehicle weight rating under 10,000 lb as of September 2008 with a phase-in starting in September 2006. NHTSA conducted an evaluation su ...
  • Development of a MASH TL4 Portable Concrete Barrier with Large Scupper
    Development of a MASH TL-4 Portable Concrete Barrier with Large Scupper
    Bligh, Roger P. ;
    Silvestri-Dobrovolny, Chiara
    2024-11-01 | PDF
    Portable concrete barriers are commonly used as temporary positive protection in work zone applications to shield motorists from hazards in the work zone and protect workers from errant vehicles. They are also used in permanent applications as a median barrier to mitigate serious cross-median crashes by preventing penetration of errant vehicles int ...
  • MASH Testing of Luminaire Pole behind Single Slope Traffic Rail
    MASH Testing of Luminaire Pole behind Single Slope Traffic Rail
    Bligh, Roger P. ;
    Bastin, Brianna
    2024-11-01 | PDF
    The purpose of the test reported herein was to assess the performance of a luminaire pole mounted behind a single slope traffic rail according to the safety-performance evaluation guidelines included in the second edition of the American Association of State Highway and Transportation Officials Manual for Assessing Safety Hardware (MASH) (1). The c ...
  • Beautifying Tennessees Roadways and Enhancing Its Ecology By Strategizing Pollinator Habitat Potential
    Beautifying Tennessee's Roadways and Enhancing Its Ecology By Strategizing Pollinator Habitat Potential
    Waldron, Brian ;
    Reyes, Paulina
    2024-11-01 | PDF
    A study was initiated through funding from the Tennessee Department of Transportation (TDOT) and the Federal Highway Administration to develop strategies on infusing pollinator habitat along Tennessee roadways. As part of the investigation, a spatial analysis of soils and topography were conducted statewide and link to TDOT mowable spaces along its ...
  • Factors Influencing Pedestrian Decisions to Cross MidBlock and Potential Countermeasures
    Factors Influencing Pedestrian Decisions to Cross Mid-Block and Potential Countermeasures
    Xie, Kun ;
    Yang, Hong
    2024-11-01 | PDF
    About 70% of pedestrian fatalities involve mid-block crossings in Virginia. To address this critical safety issue, this research aims to investigate factors influencing pedestrian decisions to cross at mid-block locations and identify potential countermeasures to enhance pedestrian safety. The research team employed a multifaceted approach. A compr ...
  • Reconsidering the Impact of Access Spacing on Crash Risk
    Reconsidering the Impact of Access Spacing on Crash Risk
    Xie, Kun ;
    Yang, Hong
    2024-11-01 | PDF
    The spacing of access points is one of the most critical elements in access management. This project aims to investigate the effect of access spacing on crash risk using scientifically rigorous statistical methods and to examine VDOT’s current access spacing standards. Specifically, the study focuses on unsignalized access types located on principa ...
  • Predicting Lane Utilization at Signalized Intersections in Advance of Arterial Lane Drops 2024
    Predicting Lane Utilization at Signalized Intersections in Advance of Arterial Lane Drops [2024]
    Anderson, Camille ;
    Runyan, Samuel L
    2024-11-01 | PDF
    Reducing the number of through travel lanes requires drivers to decide where and when they will merge from the lane that is being dropped (the short lane) to the adjacent through lane. When a large proportion of drivers choose to merge significantly upstream, this can result in poor lane utilization at an upstream signal which, in turn, leads to un ...
  • Develop and Validate Precast Column Solutions for Texas Bridges
    Develop and Validate Precast Column Solutions for Texas Bridges
    Montero-Carvajal, Emmanuel ;
    Kotha, Chakravarthi
    2024-11-01 | PDF
    This research addresses the application of precast columns in Texas bridge construction. The project combines experimental and analytical methods to develop innovative design concepts and construction details for precast concrete columns. Key design concept includes a spun-cast precast shell filled with a cast-in-place (CIP) core and connecting rei ...
  • Research Summary Refining MaxPressure Traffic Signal Control to Improve Traffic Flow
    Research Summary: Refining Max-Pressure Traffic Signal Control to Improve Traffic Flow
    Hao, Ben ;
    Stern, Raphael
    2024-11-01 | PDF
    Max-pressure (MP) traffic signal control is a new and innovative control algorithm that uses upstream and downstream vehicle counts to determine signal timing that maximizes throughput. While this method has been extensively tested in simulation, it has not yet been tested on actual traffic signals in the US. To close this gap, this report presents ...
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