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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 861 - 880 of 36049 results
  • Infrastructure Needs North Dakotas County Township and Tribal Roads and Bridges 20242043
    Infrastructure Needs: North Dakota’s County, Township and Tribal Roads and Bridges: 2024-2043
    Dybing, Alan ;
    Wentz, Bradley
    2024-10-01 | PDF
    This report is the response to the North Dakota Legislature's request for a study of the transportation infrastructure needs of all counties, townships and tribes in the state. In 2019, the North Dakota Legislature advanced HB 1066 which had a provision for funding distributions to non-oil producing counties based on the most recent version of this ...
  • Safety Impacts of Fluorescent YellowGreen Signs on Pedestrians Research Summary
    Safety Impacts of Fluorescent Yellow-Green Signs on Pedestrians [Research Summary]
    Brown, Henry
    2024-10-01 | PDF
    The objective of this research study is to synthesize existing research and review the state of the practice regarding the use of FYG for pedestrian and bicyclist signs. The research methodology includes a literature review, survey of departments of transportation (DOTs) and metropolitan planning organizations (MPOs) and follow up interviews with a ...
  • Measuring Fare Payment Compliance on MBTA Buses
    Measuring Fare Payment Compliance on MBTA Buses
    Gonzales, Eric J. ;
    Gao, Song
    2024-10-01 | PDF
    This study presents a method to estimate fare payment compliance within the Massachusetts Bay Transportation Authority bus system using only automatically collected data from the Automated Fare Collection and Automated Passenger Counting systems. Data from over 787,000 passenger boardings were used to identify patterns of fare system non-interactio ...
  • Developing Implementation Strategies for Risk Based Inspection RBI
    Developing Implementation Strategies for Risk Based Inspection (RBI)
    Washer, Glenn A ;
    Brown, Henry
    2024-10-01 | PDF
    This project's goal was to improve asset management through Risk-Based Inspection (RBI) practices. The research was intended to amplify the results of prior research that produced the Proposed Guidelines for Reliability-Based Inspection Practices. Under the new provisions of the National Bridge Inspection Standards (NBIS), bridge owners that implem ...
    Supporting Files
  • Roadway Crossings for Sensitive Amphibians and Reptiles Phase II
    Roadway Crossings for Sensitive Amphibians and Reptiles: Phase II
    Brehme, Cheryl ;
    Ewing, Brittany
    2024-10-01 | PDF
    Many migratory amphibians make annual population-level migrations among breeding wetlands and over-wintering and/or summer foraging upland terrestrial habitats. To reduce the negative impacts from road mortality on these vulnerable populations, it has been standard practice to build safe crossings in the form of small passages connected by barrier ...
  • OSTR Research Roundup October 2024
    OST-R Research Roundup: October 2024
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2024-10-01 | OST-R Research Roundup | PDF
    News from across OST-R and its research community.
  • Development of Test Procedures to Evaluate Moisture Susceptibility of Asphalt Mixtures Used in the State of Kansas Phase I Surface Free Energy of Binders Technical Summary
    Development of Test Procedures to Evaluate Moisture Susceptibility of Asphalt Mixtures Used in the State of Kansas, Phase I: Surface Free Energy of Binders [Technical Summary]
    Verma, Payal ;
    Darabi, Masoud K
    2024-10-01 | PDF
    The surface free energy of an asphalt binder and aggregate is essential for determining the moisture susceptibility of asphalt mixtures. This project proposed an efficient method to routinely measure the surface energies of asphalt binders and aggregates to help design asphalt mixtures that are increasingly resistant to moisture damage. Surface ene ...
  • Monitoring and Assessment of Landslides Along Alabama Highways
    Monitoring and Assessment of Landslides Along Alabama Highways
    Rahimikhameneh, Leila ;
    Montgomery, Jack
    2024-10-01 | PDF
    Rainfall-induced landslides are a common occurrence along Alabama highways leading to significant damage to infrastructure and disruption to traffic. There are no current approaches in use to predict when these slides are likely to occur, which limits the ability of ALDOT personnel to respond or intervene. This study developed a monitoring and asse ...
  • AntiGraffiti Protection Systems
    Anti-Graffiti Protection Systems
    Khodair, Yasser ;
    Ahmed, Muddassir M
    2024-10-01 | PDF
    Anti-graffiti coatings provide a shielding layer that facilitates the removal of graffiti by providing a water-and oil-resistant surface that precludes the penetration of paint through the substrate. The main objective of this research is to provide the Illinois Department of Transportation (IDOT) with recommendations on the re-evaluation of the ex ...
  • Development of Colorado Specific Safety Performance Functions SPFs and Diagnostic Norms for Roundabouts
    Development of Colorado Specific Safety Performance Functions (SPF’s) and Diagnostic Norms for Roundabouts
    McCarthy, Gillian ;
    Williams, Jim
    2024-10-01 | PDF
    Roundabouts commonly replace intersections to reduce the number of conflict points, with the objective of crash reduction and better operations. They are becoming ever more popular in the United States. Many U.S. based research studies on the topic of roundabouts have focused on evaluating the effectiveness of converting existing intersections to r ...
  • Modeling Road Construction Air Quality Impacts
    Modeling Road Construction Air Quality Impacts
    Walker, Curtis ;
    Juliana, Timothy
    2024-10-01 | PDF
    Understanding construction emissions and their impacts to air quality is a shared responsibility. The Colorado Department of Transportation (CDOT) and the Colorado Department of Public Health and Environment (CDPHE) have pooled resources to better quantify and understand the influence of construction activities on air quality. The objective of this ...
  • BikewaySim Using Changes in Revealed Impedance To Assess Potential Benefits of New Cycling Infrastructure
    BikewaySim: Using Changes in Revealed Impedance To Assess Potential Benefits of New Cycling Infrastructure
    Passmore, Reid ;
    Watkins, Kari
    2024-10-01 | PDF
    This research proposes a framework for assessing the impacts of new and existing cycling infrastructure using minimum impedance routing. Impedance represents the relative difficulty of cycling taking into consideration travel time, exposure to automobiles, hills, and the provision of cycling infrastructure. An all-paths network is created from Open ...
  • Patterns of Domestic AnimalVehicle Collisions on Tribal Lands in Montana US
    Patterns of Domestic Animal-Vehicle Collisions on Tribal Lands in Montana, U.S.
    Bell, Matthew ;
    Huijser, Marcel P.
    2024-09-30 | PDF
    Animal-vehicle collisions (AVCs) are a significant concern for motorist safety and pose a risk to both wildlife and domestic animals. This report analyzes spatial patterns of wildlife-vehicle collisions (WVCs) and domestic animal-vehicle collisions (DAVCs) on Montana’s tribal lands to identify high-risk areas and inform mitigation strategies. Data ...
  • Identification and Prioritization of Road Sections with a Relatively High Concentration of Large Wild MammalVehicle Collisions in Gallatin County Montana USA
    Identification and Prioritization of Road Sections with a Relatively High Concentration of Large Wild Mammal-Vehicle Collisions in Gallatin County, Montana, USA
    Huijser, Marcel P. ;
    Bell, Matthew A
    2024-09-30 | PDF
    The primary objective of this project is to identify and prioritize the road sections in Gallatin County that have a relatively high concentration of collisions involving large wild mammals. These road sections may then later be evaluated for potential future mitigation measures aimed at 1. Reducing collisions with large wild mammals, and 2. Provid ...
  • Engaging Community Partners and Youth To Enhance and Sustain Safe Routes to Schools
    Engaging Community Partners and Youth To Enhance and Sustain Safe Routes to Schools
    MacFarlane, Jennifer ;
    Kack, David
    2024-09-30 | PDF
    Safe Routes to School programs increase the number of children who walk and bike to school. By building pedestrian skills at a young age, students are more likely to choose active transportation modes across their lifespan, therefore decreasing vehicle miles traveled, reducing vehicle emissions, preventing chronic disease, and improving physical he ...
  • Evaluating Electrical Resistivity as a Procedure to Aid in Characterizing Subsurface Conditions
    Evaluating Electrical Resistivity as a Procedure to Aid in Characterizing Subsurface Conditions
    Barger, Michelle ;
    Immel, Grace
    2024-09-30 | PDF
    The Iowa DOT Soils Design section participated in the Demonstration Stage of the Advanced Geotechnical Exploration Methods (A-GaME) initiative. The A-GaME initiative sought to promote the use of advanced geotechnical methods as a means to reduce cost in subsurface investigation. One of the proven geophysical methods promoted is known as Electrical ...
  • HighMast Tower Foundation Phase II
    High-Mast Tower Foundation – Phase II
    Al Maabreh, Ammar ;
    Awawdeh, Abdelrahman
    2024-09-30 | PDF
    Challenge: High-mast luminaire supports used in the US transportation sector are typically steel poles that are attached to a baseplate via a butt or socket weld. Many have failed primarily due to fatigue cracking at the weld toe. Significant research in the US improved the fatigue performance of these structures; however, failures still occur due ...
  • Setting up ROaDS Partners with Customized Surveys Final Report
    Setting up ROaDS Partners with Customized Surveys: Final Report
    Bell, Matthew ;
    Kack, David
    2024-09-30 | PDF
    The Roadkill Observation and Data System (ROaDS) project, developed through a partnership between the U.S. Fish and Wildlife Service, National Park Service, and the Western Transportation Institute at Montana State University, provides a user-friendly data collection system to monitor wildlife-vehicle collisions (WVCs) and identify safe crossing lo ...
  • Use of Geothermal Energy for DeIcing Approach Pavement Slabs and Bridge Decks Phase II Project Summary Report
    Use of Geothermal Energy for De-Icing Approach Pavement Slabs and Bridge Decks – Phase II [Project Summary Report]
    Yu, Xinbao ;
    Puppala, Anand J.
    2024-09-30 | PDF
    The research team developed and optimized a geothermal bridge deck deicing system that can be installed onto in-service bridges through retrofitting. To meet the installation and bridge inspection challenges, the research team tested various bridge heating loop designs considering heating fluids (water-based vs. CO2), insulation materials (spray-on ...
  • Regional Sediment Bulking Methods for California in Support of Post Wildfire Flood Mitigation
    Regional Sediment Bulking Methods for California in Support of Post Wildfire Flood Mitigation
    Kondolf, G Mathias ;
    Radke, John
    2024-09-20 | PDF
    The California Department of Transportation (Caltrans) is currently searching for a methodology to determine sediment bulking specific to Northern California. In Southern California, there are specific, existing methods and equations in use by Caltrans. Due to increased wildfire occurrence and severity in northern and southern California, a regiona ...
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