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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 881 - 900 of 36104 results
  • The Effect of Rubber Fills on the Performance of Infrastructure Research Summary
    The Effect of Rubber Fills on the Performance of Infrastructure [Research Summary]
    ElGawady, Mohamed
    ORCID ICON IMG
    2024-10-01 | PDF
    This report addresses a gap in the literature by presenting the results of large-scale shear and compressibility testing of soil classified as clayey gravel and sand soil mixed with different percentages and types of TDA.
  • Performance Evaluation of Very Early Strength LatexModified Concrete LMCVE Overlay
    Performance Evaluation of Very Early Strength Latex-Modified Concrete (LMC-VE) Overlay
    Wang, Kejin ;
    Shankaramurthy, Bharath Melugiri
    2024-10-01 | PDF
    Conventional bridge deck overlays made with high-performance concrete (HPC) and low-slump dense portland cement concrete (PCC) generally require a 72-hour wet curing time before they can be opened to traffic. Shorter opening times are desired to reduce the high cost of traffic control for heavily traveled urban highways. To meet this need, high ear ...
  • Report from the 2024 UCLA Lake Arrowhead Symposium Mega Events Major Opportunities
    Report from the 2024 UCLA Lake Arrowhead Symposium: Mega Events, Major Opportunities
    Matute, Juan
    ORCID ICON IMG
    2024-10-01 | PDF
    On October 13–15, 2024, nearly 170 representatives of government, private sector consulting firms and companies, non-profit and advocacy groups, and universities joined the 2024 UCLA Lake Arrowhead Symposium on Mega Events, Major Opportunities. This report summarizes the discussions, lessons learned, and action items from the convening. Attendees h ...
  • ReUse Of Minnesota Waste Material In Sustainably Design Soils Research Summary
    Re-Use Of Minnesota Waste Material In Sustainably Design Soils [Research Summary]
    Stenlund, Dwayne ;
    Saftner, David
    2024-10-01 | PDF
    Minerals, forestry, agriculture, and industrial activities in Minnesota generate substantial by-products and waste. Strategies to reuse or recycle these can reduce landfill waste, enhance public health, conserve resources, and cut costs and emissions. Building on the frameworks by Johnson et al. (2017), Saftner et al. (2019), and Saftner et al. (20 ...
  • Synthesis of Seal Coat Research in Minnesota
    Synthesis of Seal Coat Research in Minnesota
    Minnesota. Department of Transportation. Local Road Research Board
    2024-10-01 | PDF
    While seal coating has been widely used as a cost-effective strategy in asphalt pavement preservation by the Minnesota Department of Transportation (MnDOT) and local agencies to extend the life of pavements, some cities and counties in Minnesota have reported their concerns about the premature stripping of street pavements that have been seal coate ...
  • Toward Implementation of MaxPressure Control on Minnesota Roads Phase 2
    Toward Implementation of Max-Pressure Control on Minnesota Roads: Phase 2
    Stern, Raphael ;
    Levin, Michael W.
    2024-10-01 | 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 ...
  • Development of Test Procedures to Evaluate Moisture Susceptibility of Asphalt Mixtures Used in the State of Kansas Phase I Surface Free Energy of Binders
    Development of Test Procedures to Evaluate Moisture Susceptibility of Asphalt Mixtures Used in the State of Kansas, Phase I: Surface Free Energy of Binders
    Verma, Payal ;
    Darabi, Masoud K
    2024-10-01 | PDF
    The surface free energy of asphalt binders and aggregates is a critical material property related to the moisture sensitivity of asphalt mixtures. Surface free energies of these materials can be used to quantitatively determine the interfacial adhesive bond strength between two materials and the tendency of water to displace this bond based on fund ...
  • 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 on-interaction ...
  • 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 ...
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