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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 1941 - 1960 of 36151 results
  • Evaluation of Site Effects Utilizing Cascadia Subduction Zone Ground Motions
    Evaluation of Site Effects Utilizing Cascadia Subduction Zone Ground Motions
    Khosravifar, Arash ;
    Dusicka, Peter
    2023-06-01 | PDF
    The potential Cascadia Subduction Zone (CSZ) megathrust earthquake is recognized as one of the major natural hazards affecting the Pacific Northwest of the United States. The estimation of expected ground-motions is complicated by the long-duration motions from CSZ as well as site effects from deep sedimentary basins in northwest Oregon. This study ...
  • Phase I Before Study Evaluation of Interstate 4 I4 Floridas Regional Advanced Mobility Elements FRAME Project Before Analysis Summary
    Phase I: Before Study Evaluation of Interstate 4 (I-4) Florida’s Regional Advanced Mobility Elements (FRAME) Project (Before Analysis) [Summary]
    Ponnaluri, Raj ;
    Abdel-Aty, Mohamed
    2023-06-01 | PDF
    The best way to find out if a transportation research project was meaningful is to check the numbers. The Florida Department of Transportation is laying the foundation to do that with a massive new undertaking that aims to capture safety and mobility conditions along Interstate 4 (I-4) from Orlando to Tampa.
  • Evaluation of SaturatesAromaticsResinsAsphaltenes SARA Fractionation of Asphalt Binders in Louisiana Research Project Capsule 221B
    Evaluation of Saturates/Aromatics/Resins/Asphaltenes (SARA) Fractionation of Asphalt Binders in Louisiana: Research Project Capsule [22-1B]
    Salari, Saman ;
    Mayeux, Corey R
    2023-06-01 | PDF
    The objective of this research is to evaluate the characterization of asphalt binder through TLC/FID testing and SARA grouping. The results will be further analyzed and compared with the available GPC results and other available characterizations of the asphalt binders. Furthermore, the results will be correlated with performance.
  • Performance of CostEffective NonProprietary UHPC in ThinBonded Bridge Overlays
    Performance of Cost-Effective Non-Proprietary UHPC in Thin-Bonded Bridge Overlays
    Khayat, Kamal H. ;
    Teng, Le
    2023-06-01 | PDF
    The constructability and performance of non-proprietary thixotropic UHPC for thin bonded bridge deck overlay construction was investigated. Task 1 reviewed literature on UHPC for thin bonded overlays and non-proprietary UHPC. Crack monitoring of experimental slabs cast with UHPC thin bonded overlay (MoDOT project TR201704) and pull-off bond strengt ...
  • Feasibility of NonProprietary UltraHigh Performance Concrete UHPC For Use in Highway Bridges in Montana Implementation
    Feasibility of Non-Proprietary Ultra-High Performance Concrete (UHPC) For Use in Highway Bridges in Montana: Implementation
    Berry, Michael ;
    Hendricks, Elias
    2023-06-01 | PDF
    Previous research conducted at MSU developed a nonproprietary UHPC mix design (MT-UHPC) that is significantly less expensive than commercially available mixes and is made with materials readily available in Montana. The focus of the research discussed herein was on the field implementation of MT-UHPC. Specifically, MT-UHPC was used in all field-cas ...
  • Data Interpretation of Automated Plate Load Test APLT for RealTime In Situ Determination of Unbound Layer Resilient Modulus
    Data Interpretation of Automated Plate Load Test (APLT) for Real-Time In Situ Determination of Unbound Layer Resilient Modulus
    Pajo, Bianka ;
    Becker, Peter
    2023-06-01 | PDF
    This project examined the results of an extensive program of (1) cyclic plate loading tests carried out at Purdue University’s S-BRITE site on two testing strips comprised of a coarse aggregate (Indiana #53) subbase layer compacted over either untreated or cement-stabilized subgrade, and (2) static loading tests conducted on #53 aggregate compacted ...
  • Assessment of the Mobility Energy Productivity MEP Metric for Transportation Applications in Florida
    Assessment of the Mobility Energy Productivity (MEP) Metric for Transportation Applications in Florida
    Jin, Xia ;
    Frolich, Daniel
    2023-06-01 | PDF
    This report outlines the use and application of the Mobility Energy Productivity (MEP) tool in evaluating the efficiency of transportation systems. The MEP metric assesses the quality of mobility in transportation systems, considering accessibility, energy consumption, and productivity. It incorporates time, cost, and energy-related measurements to ...
  • RailroadHighway Crossing Safety Improvement Evaluation and Prioritization Tool
    Railroad-Highway Crossing Safety Improvement Evaluation and Prioritization Tool
    Sriraj, P.S. ;
    Kawamura, Kazuya
    2023-06-01 | PDF
    The expected crash frequency model of Illinois Department of Transportation’s Bureau of Design and Environment needed improvement to incorporate track circuitry as well as pedestrian exposure at railroad-highway grade crossings to make the model more comprehensive. The researchers developed, calibrated, and validated three models to predict collisi ...
  • BIM Standards for Roads and Related Transportation Assets
    BIM Standards for Roads and Related Transportation Assets
    Hang, Li ;
    Hegazy, Hosam
    2023-06-01 | PDF
    With the industry foundation classes (IFC) building information modeling (BIM) standard (ISO 16739) being adopted by AASHTO as the national standard for modeling bridge and road infrastructure projects, there comes a great opportunity to upgrade the INDOT model development standard of roads and related assets to 2D+3D BIM. This upgrade complies wit ...
  • Stormwater Pond Maintenance and Wetland Management for Phosphorus Retention
    Stormwater Pond Maintenance, and Wetland Management for Phosphorus Retention
    Janke, Benjamin D ;
    Natarajan, Poornima
    2023-06-01 | PDF
    Reduction in phosphorus is critical because phosphate, a dissolved form of phosphorus, sustains algal and cyanobacteria growth and causes a wide range of water-quality impairments in the ponds and downstream waters including algal blooms, excess floating plants, taste, and odor problems. Many stormwater ponds and wetlands that treat stormwater appe ...
  • Design and Demonstration of an ArterialFriendly Local Ramp Metering Control System
    Design and Demonstration of an Arterial-Friendly Local Ramp Metering Control System
    Ke, Zemian ;
    Liu, Jiachao
    2023-06-01 | PDF
    This project aims to develop, assess, and optimize control strategies for ramp metering and local signal synchronization in Maryland's Transportation Systems Management and Operations (TSMO) 1 system (I-70 corridor east of Baltimore, MD). The methodology and mesoscopic simulation model can be generally applicable to other networks and TSMO systems. ...
  • Safest Placement for Crosswalks at Intersections
    Safest Placement for Crosswalks at Intersections
    Hurwitz, David ;
    Chai, Eileen
    2023-06-01 | PDF
    This research studied the relationship between crosswalk setback and intersection safety. The study included field-based and driving simulator experiments. Video data was collected at 10 crosswalks in Oregon to examine the frequency pedestrian-vehicle conflicts (measured using PET), including how these conflicts vary between corner and setback cros ...
  • Assessment of Motorcycle Safety in Wyoming Fatal and Severe Crashes Contributing Factors and Potential Countermeasures Addendum
    Assessment of Motorcycle Safety in Wyoming: Fatal and Severe Crashes, Contributing Factors and Potential Countermeasures [Addendum]
    Zlatkovic, Milan ;
    Baah, Isaac
    2023-06-01 | PDF
    Motorcycle riders and passengers are much more likely to be killed or severely injured in a crash, and on average about 15 percent of all traffic fatalities include motorcyclists. Motorcyclists and their passengers are particularly vulnerable on the roads, which accounts for their higher percentage of fatal and severe crash accidents. To take appro ...
  • Assessing Stormwater Infrastructure Capacity for Severe Storms Summary
    Assessing Stormwater Infrastructure Capacity for Severe Storms [Summary]
    Brenna, Erik ;
    Gulliver, John S.
    2023-06-01 | PDF
    MnDOT maintains a significant portion of the state’s storm- water infrastructure. Managing stormwater is important to pre-vent flooding and associated safety risks; impacts to the environ-ment; and damage to property, roads and bridges.
  • Impact of Speed Limit Changes on Urban Streets
    Impact of Speed Limit Changes on Urban Streets
    Davis, Gary A.
    2023-06-01 | PDF
    In 2019 the Minnesota Legislature amended that state’s statutes to allow cities to set speed limits on city-owned streets. In February 2021 the authors surveyed 33 cities within the Twin Cities metro area and identified the city of St. Louis Park as planning to implement a city-wide change in speed limits, with a default speed limit of 20 mph but w ...
  • Deployment of a Snowplow DriverAssist System
    Deployment of a Snowplow Driver-Assist System
    Davis, Brian ;
    Schwieters, Katelyn
    2023-06-01 | PDF
    Snowplow operators are often tasked with clearing snow from roadways under challenging conditions. One such situation is low visibility due to falling or blowing snow that makes it difficult to navigate, stay centered in the lane, and identify upcoming hazards. To support snowplow operators working in these conditions, University of Minnesota resea ...
  • Traffic Safety Facts 20122021 Data SchoolTransportationRelated Crashes
    Traffic Safety Facts 2012-2021 Data: School-Transportation-Related Crashes
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2023-06-01 | National Transportation Statistics (NTS) | PDF
    A school-transportation-related crash is a motor vehicle traffic crash that directly or indirectly involves a school transportation vehicle that is either a school bus body type or a non-school-bus functioning as a school bus, transporting children to and from school or school-related activities. For the purposes of this fact sheet, school-age chil ...
  • Screening of Asphalt Extenders and Recycling Agents
    Screening of Asphalt Extenders and Recycling Agents
    Castorena, Cassie ;
    Fried, Andrew
    2023-06-01 | PDF
    The objectives of this project are to: 1) develop recommendations for extender and recycling agent product approval and dosage selection; and 2) identify appropriate aging procedure(s) to simulate long-term oxidative aging coupled with test methods and parameters to characterize the cracking resistance of asphalt binders. Three NCDOT approved surfa ...
  • Analysis of Local Bus Markets Phase III Technical Brief
    Analysis of Local Bus Markets, Phase III [Technical Brief]
    Deka, Devajyoti ;
    Carnegie, Jon A.
    2023-06-01 | PDF
    Despite having an extensive network of public transit, traffic congestion and transportation-related greenhouse gas (GHG) emissions are significant concerns in New Jersey. This research examines the GHG impacts of NJ TRANSIT local buses in the greater Newark area service region. It involved a large-scale onboard survey of bus riders on 40 NJ TRANSI ...
  • Increasing Support for Innovative Traffic Solutions Summary
    Increasing Support for Innovative Traffic Solutions [Summary]
    Thompson, Scott ;
    Morris, Nichole
    2023-06-01 | PDF
    Public transportation agencies are constantly on the lookout for ways to reduce the number and severity of traffic crashes. One such solution is the Restricted Crossing U-turn, or RCUT, which has proven to be a safer alternative to traditional intersections on four-lane divided highways.
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