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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 3281 - 3300 of 36151 results
  • Cargo Routing and Disadvantaged Communities [supporting datasets]
    Jaller, Miguel ;
    Pahwa, Anmol
    2021-09-14 | ZIP
    Freight is fundamental to economic growth, however, the trucks that haul this freight are pollution intensive, emitting criteria pollutants and greenhouse gases at high rates. The increasing volume and time-sensitivity of freight demand over the past decade has encouraged carriers to take the fastest route, which is often not an eco-friendly route. ...
    Dataset Supporting Files
  • Extended Development and Testing of Optimized Signal Control With Autonomous and Connected Vehicles
    Extended Development and Testing of Optimized Signal Control With Autonomous and Connected Vehicles
    Elefteriadou, Lily ;
    Ranka, Sanjay
    2021-09-14 | PDF
    Previous work by the University of Florida and FDOT focused on the development of algorithms, software, and hardware solutions to enhance traffic signal control operations simultaneously with vehicle trajectories. These tests focused on the integration of the technology in a mixed traffic stream of autonomous, connected, and conventional vehicles. ...
  • Deep Learning Architectures for SkateboarderPedestrian Surrogate Safety Measures
    Deep Learning Architectures for Skateboarder–Pedestrian Surrogate Safety Measures
    Shourov, Chowdhury Erfan ;
    Sarkar, Mahasweta
    2021-09-12 | PDF
    Skateboarding as a method of transportation has become prevalent, which has increased the occurrence and likelihood of pedestrian–skateboarder collisions and near-collision scenarios in shared-use roadway areas. Collisions between pedestrians and skateboarders can result in significant injury. New approaches are needed to evaluate shared-use areas ...
  • Developing a DataDriven Safety Assessment Framework for RITI Communities in Washington State 2021
    Developing a Data-Driven Safety Assessment Framework for RITI Communities in Washington State [2021]
    Wang, Yinhai ;
    Sun, Wei
    2021-09-10 | PDF
    The roadway safety of the Rural, Isolated, Tribal, or Indigenous (RITI) communities has become an important social issue in the United States. Official data from the Federal Highway Administration (FHWA) shows that, in 2012, 54 percent of all fatalities occurred on rural roads while only 19 percent of the US population lived in rural communities. U ...
  • InService Performance Evaluation of KDOTs Cable Median Barrier
    In-Service Performance Evaluation of KDOT’s Cable Median Barrier
    Stolle, Cody S. ;
    Lechtenberg, Karla A.
    2021-09-04 | PDF
    Kansas Department of Transportation (KDOT) installed approximately 7.9 total miles of cable median barrier (CMB) along K-10, K-96, and US-75 highways in 2011 and 2012. In January 2020, KDOT funded a study to evaluate Kansas CMB performance by analyzing cross-median crashes (CMCs) and cross-median events (CMEs). All crashes which occurred on these r ...
  • Determine Use of Alternate Retroreflective Pavement Markers RPMs on Highways With Centerline Rumble Strips and Winter Weather Pavement Marking Improvements
    Determine Use of Alternate Retroreflective Pavement Markers (RPMs) on Highways With Centerline Rumble Strips and Winter Weather Pavement Marking Improvements
    Ferron, Raissa ;
    Rung, Michael
    2021-09-01 | PDF
    The use of snowplows in northern Texas frequently results in the loss of retroreflective pavement markers (RPMs). The loss of RPMs is not only costly but also creates unsafe driving conditions during inclement weather. Pavement sections in these districts often use a centerline rumble strip for safety. Traditionally, these rumble strips have preclu ...
  • Megaprojects for Megaregions Global Cases and Takeaways
    Megaprojects for Megaregions: Global Cases and Takeaways
    Landis, John D
    ORCID ICON IMG
    2021-09-01 | PDF
    This final report is a summary version of Megaprojects for Megacities: A Comparative Casebook, to be published by Edward Elgar Publishers in 2022; all rights reserved. Megaprojects for Megacities includes detailed case studies and analysis of 14 sets of contemporary megaprojects from around the world, including (i) London Cross rail; (ii) Metro sys ...
  • Effect of Disruptions on Megaregion Emergency Evacuation A Pilot Study
    Effect of Disruptions on Megaregion Emergency Evacuation: A Pilot Study
    Wolshon, Brian ;
    Shapouri, Mohammad
    2021-09-01 | PDF
    The Gulf Coast region of the United States is increasingly vulnerable to a growing list of natural and manmade hazards. Mass evacuations are a fundamental protective action for the safety of the region; however, the complexity of such evacuations makes the rapid movement of people a complex task. This study introduces a performance index that ranks ...
  • Effectiveness of Bike Boxes in Massachusetts
    Effectiveness of Bike Boxes in Massachusetts
    Christofa, Eleni ;
    Ai, Chengbo
    2021-09-01 | PDF
    Bike boxes provide a designated space for bicyclists to gather at the front of a traffic queue, to improve bicyclist visibility and predictability. This project studied the effectiveness of bike boxes in Massachusetts by investigating motorist and bicyclist behaviors and the effects of bike box design. The study included a comprehensive inventory, ...
  • Concrete Pavement Mixtures With High Supplementary Cementitious Materials Content Volume 3
    Concrete Pavement Mixtures With High Supplementary Cementitious Materials Content: Volume 3
    Ley, M Tyler ;
    Lloyd, Zane
    2021-09-01 | PDF
    Fly ash is a by-product of coal combustion, made up of particles that are collected through various methods. This by-product has been used successfully as a partial Portland cement replacement in concrete, but the performance predictions of fly ash in concrete have been difficult to predict, especially at high fly ash replacement rates. This study ...
  • EarlyAge Properties of HighVolume Fly Ash Concrete Mixes for Pavement Volume 2
    Early-Age Properties of High-Volume Fly Ash Concrete Mixes for Pavement: Volume 2
    Baral, Aniruddha ;
    Roesler, Jeffrey R.
    2021-09-01 | PDF
    High-volume fly ash concrete (HVFAC) is more cost-efficient, sustainable, and durable than conventional concrete. This report presents a state-of-the-art review of HVFAC properties and different fly ash characterization methods. The main challenges identified for HVFAC for pavements are its early-age properties such as air entrainment, setting time ...
  • Improve Material Inputs into Mechanistic Design Properties for Reclaimed HMA Recycled Concrete Aggregate RCA Roadways
    Improve Material Inputs into Mechanistic Design Properties for Reclaimed HMA & Recycled Concrete Aggregate (RCA) Roadways
    Cetin, Bora ;
    Gheibi, Ida
    2021-09-01 | PDF
    The use of recycled materials promotes sustainability in roadway construction by reducing the consumption of energy and emission of greenhouse gases associated with mining and the production of virgin aggregate (VA). Recycled asphalt pavement (RAP) and recycled concrete aggregate (RCA) have comparable characteristics to VA that have been used in ro ...
  • Investigating and Developing a Mash Compliant Contraflow Ramp Closure Gate Research Project Capsule 211ST
    Investigating and Developing a Mash Compliant Contraflow Ramp Closure Gate: Research Project Capsule [21–1ST]
    Kiani, Maysam ;
    Rupnow, Tyson
    2021-09-01 | PDF
    The research objective is to investigate the MASH crashworthiness of the DOTD ramp closure gate through computer simulation. Using the current DOTD gate system as a model, this project will evaluate the design according to MASH test numbers 60, 61, and 62 criteria.
  • Development of Guidelines for Implementation of Horizontal Directional Drilling
    Development of Guidelines for Implementation of Horizontal Directional Drilling
    Hashash, Youssef M. A ;
    Baltaji, Omar
    2021-09-01 | PDF
    While the fundamentals of horizontal directional drilling (HDD) technology are well known, the implementation of HDD involves utilizing a vast range of equipment and installation procedures. This project developed HDD guidance documents to provide the Illinois Department of Transportation with metrics to evaluate a proposed HDD installation. This r ...
  • Improvement of the Georgia Statewide Travel Demand Model GSTDM Phase 2
    Improvement of the Georgia Statewide Travel Demand Model (GSTDM) – Phase 2
    Circella, Giovanni ;
    Choi, Sungtaek
    2021-09-01 | PDF
    This report details a number of proposed improvements in the Georgia Statewide Travel Demand Model (GSTDM) using the 2017 National Household Travel Survey (NHTS) and its Georgia add-on portion. These improvements include (1) the development of a vehicle ownership model and a time-of-day segmentation, (2) estimating and evaluating a destination choi ...
  • Development of an Innovation Corridor Testbed for Shared Electric Connected and Automated Transportation
    Development of an Innovation Corridor Testbed for Shared Electric Connected and Automated Transportation
    Oswald, David ;
    Hao, Peng
    2021-09-01 | PDF
    As part of the City of Riverside’s Smart-City initiative, UC Riverside researchers have developed an Innovation Corridor testbed for enabling shared electric connected and automated transportation research. This Innovation Corridor testbed is located in Riverside California, and consists of a six-mile section of University Avenue between the UC Riv ...
  • Disaster Resilience through Diverse Evacuation and Emergency Transportation Systems
    Disaster Resilience through Diverse Evacuation and Emergency Transportation Systems
    Zhu, Jin ;
    Ren, Zheng
    2021-09-01 | PDF
    No Description
  • Improving Overweight and OverDimensional Logistics and Truck Routing
    Improving Overweight and Over-Dimensional Logistics and Truck Routing
    Kissick, Jerry ;
    Pigman, Jerry
    2021-09-01 | PDF
    In 2012, the Kentucky Transportation Cabinet’s (KYTC) Division of Motor Carriers (DMC) issued 98,196 overweight or over-dimensional (OW/OD) permits. To determine whether a route can accommodate an OW/OD vehicle, analysts must have current and accurate data on construction schedules, road conditions, and detour routes, among other factors. This stud ...
  • Assessing the Impact of Equity Work in Transportation
    Assessing the Impact of Equity Work in Transportation
    McCullough, Sarah Rebolloso ;
    Erasmus, Sequoia
    2021-09-01 | PDF
    This report assesses equity work within transportation in California by analyzing the expert perspectives of transportation professionals who also identify as Black or people of color. 28 professionals from across the state were interviewed. Many interviewees work on transportation equity as part of their central job function. Interviews were trans ...
  • CGEM A Cerebral Blood Flow Based Computer Model of GzInduced Effects
    CGEM: A Cerebral Blood Flow Based Computer Model of Gz-Induced Effects
    Copeland, Kyle ;
    Whinnery, James E.
    2021-09-01 | PPT
    Narrated Slideshow Presentation: A Cerebral Blood Flow Based Computer Model of Gz-Induced Effects, presented at 91st AsMA Annual Scientific Meeting, Denver, CO, United States. Describes software model (the Civil Aerospace Medical Institute G-Effects Model [CGEM]) based on physical and physiological variables related to inflight tissue resupply, usi ...
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