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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 1681 - 1700 of 36104 results
  • Effect of Longitudinal Joint Construction and Density on Asphalt Pavement Performance Phase I State of the Practice
    Effect of Longitudinal Joint Construction and Density on Asphalt Pavement Performance – Phase I – State of the Practice
    Akentuna, Moses ;
    Salari, Saman
    2023-10-01 | PDF
    The construction of longitudinal joints to specified densities significantly impacts the performance and service life of asphalt pavements. Ensuring proper compaction is essential to creating impermeable joints that can withstand water infiltration, prevent moisture damage, and enhance long-term performance. Various entities, including state depart ...
  • Drainage 101 Understanding and Managing Drainage Issues Implementation Summary
    Drainage 101: Understanding and Managing Drainage Issues [Implementation Summary]
    Arvidson, Tim ;
    Bot, Steve
    2023-10-01 | PDF
    This Implementation Summary relations to Report 2023RIC08, published April 2023.
  • District Highway Maintenance Research OnCall ROC Task 4 Best Practices for Using Slag in Chip Seal Treatments
    District Highway Maintenance Research On-Call (ROC) Task 4: Best Practices for Using Slag in Chip Seal Treatments
    Abbas, Ala R. ;
    Nazzal, Munir
    2023-10-01 | PDF
    This research-on-call (ROC) task was conducted to assist the Ohio Department of Transportation (ODOT) in gaining a better understanding of slag materials that can be used as chip seal aggregates and the potential benefits and drawbacks from using these materials with chip seal treatments. An online survey was conducted in this study to gather infor ...
  • Evaluation of Software Platforms for Transit Service Planning for Potential Statewide Applications Summary
    Evaluation of Software Platforms for Transit Service Planning for Potential Statewide Applications [Summary]
    Gan, Albert ;
    Matthews, Gabrielle
    2023-10-01 | PDF
    Transit agencies are increasingly using commercially available software platforms to assist in their service planning. These platforms vary in their applications, functionalities, and capabilities, among others. This project includes three focuses: (1) identifies and evaluates existing software platforms used by transit agencies for transit service ...
  • Financial Achievability Model Operationalization Case Studies and Analysis Summary
    Financial Achievability Model: Operationalization Case Studies and Analysis [Summary]
    Tuck, Jason ;
    Schriefer, Patricia (Born)
    2023-10-01 | PDF
    In a prior research project (BDK83 977-24), the Financial Achievability Model (FAM) was created for the Florida Department of Transportation Research Center. The Research Center can use the FAM in all phases of research to meet strategic objectives, including demonstrating the potential benefits of proposed projects, allowing for a more cost-effect ...
  • Effectiveness of Contrast Markings on Roadways and Orange Markings in Work Zones
    Effectiveness of Contrast Markings on Roadways and Orange Markings in Work Zones
    Williamson, Michael ;
    Lin, Ping
    2023-10-01 | PDF
    Lane departure crashes are a leading cause of fatalities and injury crashes on roadways. To solve this problem, innovative marking in the form of contrasted white on concrete sections and orange marking in work zones were evaluated for their safety benefits. A highway safety manual approach was taken to evaluate the crash reduction benefits from ea ...
  • Evaluation of Upgraded Head Restraints FMVSS 202a
    Evaluation of Upgraded Head Restraints: FMVSS 202a
    Díaz, E Acevedo
    2023-10-01 | PDF
    Beginning with vehicle model year 2010, FMVSS 202a established new requirements for head restraints in passenger vehicles. This study evaluates the effectiveness of head restraints in reducing cervical spine injuries, including whiplash injuries, for passenger vehicle occupants using NHTSA’s National Automotive Sampling System Crashworthiness Data ...
  • Transportation Equity Training for MnDOT Employees
    Transportation Equity Training for MnDOT Employees
    Abdulle, Abdullahi
    2023-10-01 | PDF
    Construction of freeways in the 1960s displaced thousands of homes and businesses as neighborhoods were cut in two or cleared. Primarily Black communities suffered significant economic burden and social impacts. Interstate 35W (I-35W), I-94 and State Highway 55, for example, cut through the Twin Cities in areas that were home to 82% of the city’s B ...
  • Erosion Resistant Rock Shoulder
    Erosion Resistant Rock Shoulder
    Song, Chung R. ;
    Wood, Richard L.
    2023-10-01 | PDF
    Highway shoulder rocks are exposed to continuous erosion force due to unexpected floodings caused by climate change. The evaluation methods of the erosion resistance of highway shoulder rocks are not currently well-developed. This study developed a new large-scale testing device, the University of Nebraska-Lincoln Erosion Testing Bed (UNLETB), whic ...
  • Traffic Safety Evaluation of Pedestrians and Bicyclists at Roundabouts in Minnesota
    Traffic Safety Evaluation of Pedestrians and Bicyclists at Roundabouts in Minnesota
    Wagner, Mark ;
    Leuer, Derek
    2023-10-01 | PDF
    By the end of 2022, nearly 450 roundabouts were installed on Minnesota roadways. An evaluation of traffic safety at roundabouts published by MnDOT in 2017 showed substantial decreases in fatal and serious injury crashes for all users at intersections after installation of a roundabout. The safety effects of roundabouts are largely due to geometric ...
  • Bicycle and Pedestrian Safety Research Project
    Bicycle and Pedestrian Safety Research Project
    Jackson, Steve ;
    Raymond, Paula
    2023-10-01 | PDF
    Crash typing is the process of analyzing crash details to categorize crashes into similar groups, which can help identify hotspots, rising problems, and deploy the most effective countermeasures. This research analyzed crashes involving motor vehicles and bicycles or pedestrians in Idaho between 2012 and 2021. Using the PBCAT2 methodology, with sup ...
  • Utilization of UHPC Bridge Superstructures in Texas Volume 1 UHPC Mixture Development and MaterialLevel Experiments
    Utilization of UHPC Bridge Superstructures in Texas— Volume 1: UHPC Mixture Development and Material-Level Experiments
    Hueste, Mary Beth D. ;
    Mukhopadhyay, Anol
    2023-10-01 | PDF
    The use of ultra-high performance concrete (UHPC) in Texas bridges has the potential to add substantial improvements to bridge construction. Advanced material properties and superior durability of UHPC can result in significant design and construction benefits. Within this context, this project evaluated the application of UHPC for precast, pretens ...
  • Effective PedestrianNonMotorized Crossing Enhancements Along Higher Speed Corridors
    Effective Pedestrian/Non-Motorized Crossing Enhancements Along Higher Speed Corridors
    Houten, Ron Van ;
    Kwigizile, Valerian
    2023-09-30 | PDF
    The purpose of this research was to examine crashes along higher speed roads (speed limit of 45 mph or more) excluding freeways, at signalized and unsignalized locations, determine predominant causes of these crashes, and to identify countermeasures for these crashes. Assessment of high crash corridors included an examination of the number of crash ...
  • Assessing the Impact of Chloride Deicer Application in the Siskiyou Pass, Southern Oregon [Supporting Dataset]
    Stonewall, Adam J
    2023-09-30 | ZIP
    Chloride deicers have been applied by the Oregon Department of Transportation (ODOT) to Interstate Route 5 (I–5) from the Oregon-California border north to mile marker 10 for several years in the high-elevation area known as the Siskiyou Pass. Magnesium chloride (MgCl2) and sodium chloride (NaCl) are applied to keep the interstate highway safe for ...
    Dataset
  • Repair of Bridge Deck Fascias
    Repair of Bridge Deck Fascias
    Cakmak, Furkan ;
    Menkulasi, Fatmir
    2023-09-30 | PDF
    The relatively high supply of moisture in bridge deck fascias often causes them to deteriorate more quickly than other portions of the bridge. This causes the fascia concrete to become de-bonded from the reinforcement and fall, posing a safety hazard to traffic or pedestrians beneath the bridge. A related concern is that the deterioration of the co ...
  • Assessing the Effects of Chloride Deicer Applications on Groundwater near the Siskiyou Pass, Southwestern Oregon, July 2018–February 2021 [supporting dataset]
    Herrera, Nora B.
    ORCID ICON IMG
    2023-09-29 | ZIP
    The U.S. Geological Survey, in cooperation with the Oregon Department of Transportation (ODOT), evaluated the effects of cold-weather chloride deicers (road deicing chemicals) on groundwater quality, with a focus on chloride, near the Siskiyou Pass in southwestern Oregon. The study covered the period during July 2018 through February 2021. Between ...
    Dataset
  • Data for Estimating Peak-Flow Quantiles for Selected Annual Exceedance Probabilities in Illinois [Supporting Dataset]
    Marti, Mackenzie K ;
    Over, Thomas M.
    2023-09-25 | ZIP
    The U.S. Geological Survey Central Midwest Water Science Center completed a report (Over and others, 2023) documenting the methods, results, and applications of an updated flood-frequency study for the State of Illinois. This data release contains data related to the analysis completed to determine peak-flow quantiles (flood frequency estimates) at ...
    Dataset
  • Peak-Flow Frequency Analysis for 464 U.S. Geological Survey Streamgages in Illinois, Indiana, and Wisconsin, Based on Data Through Water Year 2017 [Supporting Dataset]
    O'Shea, Padraic S. ;
    Over, Thomas M.
    2023-09-25 | ZIP
    The U.S. Geological Survey (USGS) Central Midwest Water Science Center (CMWSC) completed a report (Over and others, 2023) documenting methods for peak-flow frequency analysis in Illinois following Bulletin 17C guidelines. The methods are used to provide estimates of peak-flow quantiles for 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exc ...
    Dataset
  • Optimal INS Monitor for GNSS Spoofer Tracking Error Detection
    Optimal INS Monitor for GNSS Spoofer Tracking Error Detection
    Kujur, Birendra ;
    Khanafseh, Samer
    2023-09-15 | PDF
    In this article, we describe a new method for detecting global navigation satellite system (GNSS) spoofing using an inertial navigation system. We specifically address the most difficult-to-detect scenario, in which a spoofer replicates the authentic GNSS signal with only additive errors due to the spoofer’s uncertainty in knowledge of the target’s ...
  • Advanced Testing and Characterization of Iowa Soils and Geomaterials
    Advanced Testing and Characterization of Iowa Soils and Geomaterials
    Aydin, Ceren ;
    Cetin, Bora
    2023-09-11 | PDF
    Accurate modeling of stress-strain characteristics of geomaterials plays a significant role in determining the achievable design life of roadways (e.g., granular roads and paved roads). Currently, the geomechanical characteristics of these materials are obtained from standard laboratory tests such as California Bearing Ratio (CBR) and standard resi ...
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