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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 3201 - 3220 of 35958 results
  • 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 ...
  • Resilient and Rapid Repair Measures for Seismically Vulnerable Bridges Following Major Earthquakes
    Resilient and Rapid Repair Measures for Seismically Vulnerable Bridges Following Major Earthquakes
    Murtuz, A K M Golam ;
    Dusicka, Peter
    2021-09-01 | PDF
    The Cascadia Subduction Zone (CSZ) earthquake threatens bridges across the Pacific Northwest. Damage is expected to be geographically spread throughout the region and will have a nearly simultaneous impact on transportation through several important corridors. While bridge repair and replacement will ultimately be needed, priority will be placed on ...
  • Impact of Connected and Autonomous Vehicles on Nontraditional Intersection Design Superstreets
    Impact of Connected and Autonomous Vehicles on Nontraditional Intersection Design: Superstreets
    Fan, Wei (David) ;
    Liu, Shaojie
    2021-09-01 | PDF
    Congestion has been becoming a critical issue for transportation professionals as it increases travel time, energy use and pollutant emissions. Thanks to recent technology development of wireless communication and artificial intelligence, connected and autonomous vehicles (CAVs) become a promising and practical approach to increasing road capacity. ...
  • Best Practice Operation of Reversible Express Lanes for the Kennedy Expressway
    Best Practice Operation of Reversible Express Lanes for the Kennedy Expressway
    Mohammadian, Abolfazl ;
    Parsa, Amir Bahador
    2021-09-01 | PDF
    Reversible lanes in Chicago’s Kennedy Expressway are an available infrastructure that can significantly improve traffic performance; however, a special focus on congestion management is required to improve their operation. This research project aims to evaluate and improve the operation of reversible lanes in the Kennedy Expressway. The Kennedy Exp ...
  • Pooled and Shared Travel in the Wake of the Pandemic An Inventory and User and Expert Assessments of Vehicle Design Strategies to Mitigate Risk of Disease Transmission
    Pooled and Shared Travel in the Wake of the Pandemic: An Inventory and User and Expert Assessments of Vehicle Design Strategies to Mitigate Risk of Disease Transmission
    Sanguinetti, Angela ;
    DePew, Ashley
    2021-09-01 | PDF
    This project involved the development of a COVID-19 Risk-mitigating Vehicle Design (CRVD) typology to summarize and analyze the wide variety of vehicle design strategies that have been implemented or suggested to reduce the risk of COVID-19 transmission among workers and passengers in shared and pooled vehicles. Public transit and shared mobility s ...
  • Detecting Driver Drowsiness With MultiSensor Data Fusion Combined With Machine Learning
    Detecting Driver Drowsiness With Multi-Sensor Data Fusion Combined With Machine Learning
    Kulhandjian, Hovannes
    ORCID ICON IMG
    2021-09-01 | PDF
    According to the National Highway Traffic Safety Administration, in 2017 drowsy driving resulted in 50,000 injuries across 91,000 police-reported accidents, as well as almost 800 deaths. Through the application of visual and radar sensors combined with machine learning, this research developed a drowsy driver detection system aimed to prevent poten ...
  • Calculating Road User Cost for Specific Sections of Highway for Use in Alternative Contracting Project
    Calculating Road User Cost for Specific Sections of Highway for Use in Alternative Contracting Project
    Shrestha, K. Joseph ;
    Uddin, Moin
    2021-09-01 | PDF
    Road user costs (RUCs) quantify the inconveniences to road users resulting from ongoing construction projects. Although the concept of RUC has traditionally been associated with the life cycle cost analysis, its importance has increased in alternative contracting methods in recent years. Despite its importance, the Tennessee Department of Transport ...
  • A Data-Driven Safety Dashboard Assessing Maryland Statewide Density Exposure of Pedestrians, Bicycles, and E-Scooters [supporting datasets]
    Xiong, Chenfeng ;
    Mahmoudi, Jina
    2021-09-01 | ZIP
    This project’s ultimate deliverable is a functional Vulnerable User Density Dashboard (https://mti.umd.edu/sdi) for the state of Maryland. The dashboard uses mobile device location data and electric scooter volume data to reflect pedestrian, bicycle, and electric scooter travel volumes and their exposure to roadway safety risk across all roadways i ...
    Dataset Supporting Files
  • Develop Rapid Quality Control and Assurance Technologies for Pavements Phase I
    Develop Rapid Quality Control and Assurance Technologies for Pavements: Phase I
    Crockford, Bill ;
    Gu, Fan
    2021-09-01 | PDF
    Attaining uniform construction of the required specification quality serves to maximize pavement life and minimize life-cycle costs. Often, localized defects govern pavement life. This project evaluated technologies for rapidly verifying attainment of specification and material requirements during flexible base construction, during asphalt mixture ...
  • Use of Geosynthetics on Subgrade and on Low and Variable Fill Foundation
    Use of Geosynthetics on Subgrade and on Low and Variable Fill Foundation
    Christoforidou, Eirini ;
    Bobet, Antonio
    2021-09-01 | PDF
    There are significant problems during construction to establish an adequate foundation for fills and/or subgrade for pavements when the natural ground has low-bearing soils. Geosynthetics such as geogrids, geotextiles, and/or geocells could provide a less time-consuming, costly alternative for establishing an adequate foundation for the fill and/or ...
  • Analysis of Intermodal VesseltoRail Connectivity
    Analysis of Intermodal Vessel-to-Rail Connectivity
    Azimi, Mehdi ;
    Fayek, Enamul Karim
    2021-09-01 | PDF
    No Description
  • Prioritizing People Mixed Equilibrium Assignment for AV Based on Occupancy
    Prioritizing People - Mixed Equilibrium Assignment for AV Based on Occupancy
    Mantri, Sruthi ;
    Lownes, Nicholas
    2021-09-01 | PDF
    As transportation technology continues to evolve, Autonomous Vehicles (AV) have the potential to disrupt the way we travel and require adjustments to our traditional transportation operations mode choice models. As AV become more widely available and increase in market share, there are predictions that a significant portion of the AV fleet will be ...
  • Test Procedure for MechanicsBased Assessment of Flexible Base Quality
    Test Procedure for Mechanics-Based Assessment of Flexible Base Quality
    Lytton, Robert ;
    Devadas, Arvind
    2021-09-01 | PDF
    The scope of this research is to use commercially available ground penetrating radar (GPR) system and apply the developed methodologies to estimate the modulus of a base layer or estimate pavement layer composition values, including water content or asphalt content, density, percent air or porosity in the asphalt, concrete, base, and subgrade layer ...
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