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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 3781 - 3800 of 36011 results
  • Hurricane Evacuation Modeling Package
    Hurricane Evacuation Modeling Package
    Wilmot, Chester ;
    Gudishala, Ravindra
    2021-03-01 | PDF
    The Hurricane Evacuation Modeling Package (HEMP) is a computer-based software package that estimates the time-dependent evacuation behavior of households facing an oncoming hurricane. With the exception of the evacuation network, the package operates entirely on data available from official sources and uses models that have been estimated from obse ...
  • Biobjective Optimization for Battery Electric Bus Deployment Considering Cost and Environmental Equity
    Bi-objective Optimization for Battery Electric Bus Deployment Considering Cost and Environmental Equity
    Liu, Xiaoyue Cathy ;
    Zhou, Yirong
    2021-03-01 | PDF
    Public transit, compared with passenger cars, can effectively help conserve energy, reduce air pollution, and optimize flow on roadways. In recent years, Battery Electric Bus (BEB) is receiving an increasing amount of attention from the transit vehicle industry and transit agencies due to recent advances in battery technologies and the direct envir ...
  • Editorial Advances in Planning for Emerging Transportation Technologies Towards Automation Connectivity and Electric Propulsion
    Editorial: Advances in Planning for Emerging Transportation Technologies: Towards Automation, Connectivity, and Electric Propulsion
    Labi, Samuel ;
    Anastasopoulos, Panagiotis
    2021-03-01 | PDF
    Transportation systems continue to face significant challenges and opportunities in the context of their social, technical, and economic outcomes (De Neufville and Scholtes, 2011; Kaewunren et al.; Sinha et al., 2017; De Martinis and Corman, 2018; Bongiovanni et al., 2019; Eker et al., 2019; Eker et al., 2020a; Barmpounakis and Geroliminis, 2020; B ...
  • Setting TNC Policies to Increase Sustainability
    Setting TNC Policies to Increase Sustainability
    Fuller, Sam ;
    Kunz, Tatjana
    2021-03-01 | PDF
    Cities and states across the U.S. are assessing fees or taxes on transportation network company (TNC) platforms, such as Uber and Lyft. The goals of these policies include traffic and emissions mitigation, as well as revenue generation, among other objectives. This research aims to assess the goals and effectiveness of these fees in achieving some ...
  • Reduced Cementitious Material in Optimized Concrete Mixtures
    Reduced Cementitious Material in Optimized Concrete Mixtures
    Taylor, Peter ;
    Sadati, Seyedhamed
    2021-03-01 | PDF
    This document reports the activities and observations of a research team that performed on-site and laboratory testing of concrete mixtures with reduced cementitious materials content placed in two cells at the MnROAD facility in Albertville, Minnesota. The overall objectives of this research project included investigating the early age characteris ...
  • Updated Survey Standards and Control Guidance for Improved Operations
    Updated Survey Standards and Control Guidance for Improved Operations
    Simpson, Chase ;
    Kim, Su-Kyung
    2021-03-01 | PDF
    Two control survey networks, observed via a traditional survey campaign and NRTK surveying campaign, were established at two independent study areas. To assess the performance of different surveying scenarios, a least squares adjustment was applied to all available traditional survey and NRTK data to create a reference dataset for each project site ...
  • Assessing and Addressing Deficiencies in the HCM Weaving Segment Analyses
    Assessing and Addressing Deficiencies in the HCM Weaving Segment Analyses
    Rouphail, Nagui M. ;
    Aghdashi, Behzad
    2021-03-01 | PDF
    The Highway Capacity Manual 6th Edition (HCM6) provides methods for the evaluation of freeway segments and freeway facilities including weaving segments. Weaving segments are often critical components of freeway facilities because they can act as bottlenecks. Recent research has questioned the validity of the HCM6 weaving analysis methodology. The ...
  • Feasibility of NonProprietary UltraHigh Performance Concrete UHPC for use in Highway Bridges in Montana Phase II Field Application
    Feasibility of Non-Proprietary Ultra-High Performance Concrete (UHPC) for use in Highway Bridges in Montana: Phase II Field Application
    Berry, Michael ;
    Scherr, Riley
    2021-03-01 | PDF
    The overall objective of this research was to further develop and characterize an economical non-proprietary ultra high performance concrete (UHPC) made with materials readily available in Montana. Specifically, this research focused on (1) investigating the potential variability in performance related to differences in constituent materials, (2) i ...
  • Rethinking Streets for Physical Distancing
    Rethinking Streets for Physical Distancing
    Schlossberg, Marc ;
    Lewis, Rebecca
    2021-03-01 | PDF
    This report summarizes the primary output of this project, a book of COVID-era street reconfiguration case studies called Rethinking Streets During COVID-19: An Evidence-Based Guide to 25 Quick Redesigns for Physical Distancing, Public Use, and Spatial Equity. COVID-era needs have accelerated the process that many communities use to make street tra ...
  • Big Transportation Data Analytics
    Big Transportation Data Analytics
    Liu, Xiaoyue Cathy ;
    Yi, Zhiyan
    2021-03-01 | PDF
    Traffic volume data is crucial in many applications, including transportation operation analysis, congestion management, accident prevention, etc. Yet an extensive capture of accurate volume information on a large-scale network can be difficult and costly. This research focuses on hourly traffic volume prediction in a statewide network using spatia ...
  • Improve and Gain Efficiency in Winter Operations March 2021
    Improve and Gain Efficiency in Winter Operations March 2021
    Iyer, Ananth V ;
    Dunlop, Steven R
    2021-03-01 | PDF
    This report analyzes the current service level of winter operations in Indiana and explores opportunities to optimize performance. We analyze data regarding winter operations managed by INDOT and provide specific quantified estimates of opportunities to improve efficiency while also managing costs. For our exploration, we use data provided by INDOT ...
  • Research Project 930982 GeoGIS Transition and Support
    Research Project 930–982, GeoGIS Transition and Support
    Smith, Randy K.
    2021-03-01 | PDF
    GeoGIS is a web-based geotechnical database management system developed for the Alabama Department of Transportation (ALDOT). The purpose of GeoGIS is to facilitate the efficient storage and retrieval of geotechnical documents. The website utilizes a web-based map to search for documents based on the location of the project to which the document is ...
  • Methodology for Evaluating Intersection Safety Operational Performance With LeftTurn Phasing
    Methodology for Evaluating Intersection Safety & Operational Performance With Left-Turn Phasing
    Zhang, Zhao ;
    Yang, Xianfeng (Terry)
    2021-03-01 | PDF
    According to the National Highway Traffic Safety Administration (NHTSA), many fatal and severe injury crashes involve left-turn traffic. Based on the left-turn crash record from the Utah Department of Transportation (UDOT) during 2010-2017, 24,860 crashes involved left-turning vehicles, including 714 suspected serious injuries and 82 fatalities. Mo ...
  • Guidelines for Prioritizing Curb Ramp Retrofits Under the Americans With Disabilities Act
    Guidelines for Prioritizing Curb Ramp Retrofits Under the Americans With Disabilities Act
    MacKnight, Hannah E ;
    Ohlms, Peter B.
    2021-03-01 | PDF
    Each year, the Virginia Department of Transportation (VDOT) invests millions of dollars retrofitting curb ramps to put them in compliance with the Americans with Disabilities Act. In 2019, VDOT’s Traffic Engineering Division (TED) completed an inventory of accessibility barriers, finding that approximately 80% of VDOT’s 80,000 curb ramps were nonco ...
  • Development of MultiAxial Fatigue Retrofits for Waterway Lock Gate Components
    Development of Multi‐Axial Fatigue Retrofits for Waterway Lock Gate Components
    Verkamp, Logan ;
    Prinz, Gary S.
    2021-03-01 | PDF
    Many lock gates within the US have reached or exceeded their designed life. Due to the intensity of cyclic loads and the environment, fatigue cracks have become a prominent issue. The work presented in this report is an analytical and experimental investigation into multi-axial fatigue crack mitigation by the use of carbon fiber reinforced polymer ...
  • Division of Engineering Services Research OnCall Agreement 31796 Task 8 Evaluation of Rock Channel Protection Design Procedures
    Division of Engineering Services Research On-Call Agreement #31796 Task #8: Evaluation of Rock Channel Protection Design Procedures
    White, Kevin ;
    Adkins, Eric
    2021-03-01 | PDF
    A study was undertaken to investigate the source of the Ohio Department of Transportation culvert outlet protection design methodology and to compare this method with other State DOTs and Federal Highway Administration (FHWA) methodologies. The original source of the Ohio DOT methodology was long thought to be a study conducted by the University of ...
  • Assessing Regulatory Compliance and Community Air Pollution Impacts of Crude Oil by Rail Transport in Baltimore City Maryland
    Assessing Regulatory Compliance and Community Air Pollution Impacts of Crude Oil by Rail Transport in Baltimore City, Maryland
    Smith, Genee S
    2021-03-01 | PDF
    Increased fracking since 2011 has resulted in the transport of crude oil by rail (CBR) to refineries and ports across the United States. Previous derailments of trains transporting CBR have resulted in dozens of deaths and polluted air, soil, and waterways. A derailment of a train carrying crude oil in Baltimore, Maryland, could adversely impact ro ...
  • Utilizing Machine Learning To CrossCheck Traffic Data and Understand Urban Mobility
    Utilizing Machine Learning To Cross-Check Traffic Data and Understand Urban Mobility
    Zhang, Zhao ;
    Yang, Xianfeng (Terry)
    2021-03-01 | PDF
    At UDOT, PeMS stores point data collected by roadside radar sensors, loop detectors, and micro-loops, while ClearGuide contains statewide probe data. PeMS data can greatly support mobility pattern studies but are only available at detector locations. In contrast, ClearGuide can provide statewide traffic speed information based on probe vehicle data ...
  • Use of Relative Surface Technology for Creation of Relative Milling Surface Models and During the Automated Machine Guidance Milling Operation
    Use of Relative Surface Technology for Creation of Relative Milling Surface Models and During the Automated Machine Guidance Milling Operation
    Embacher, Rebecca ;
    Schneider, James
    2021-03-01 | PDF
    The Minnesota Department of Transportation needed to correct the existing profiles of the eastbound and westbound lanes of TH2. This roadway was reconstructed 9 years ago, and since then, it has experienced significant pavement movement due to the presence of silt seams in the subgrade material. The movement of the roadway had stabilized and was st ...
  • Develop and Deploy a Safe Truck Platoon Testing Protocol for the Purdue ARPAE Project in Indiana
    Develop and Deploy a Safe Truck Platoon Testing Protocol for the Purdue ARPA-E Project in Indiana
    Shaver, Greg ;
    Droege, Miles
    2021-03-01 | PDF
    Hilly terrain poses challenges to truck platoons using fixed set speed cruise control. Driving the front truck efficiently on hilly terrain improves both trucks fuel economies and improves gap maintenance between the trucks. An experimentally-validated simulation model was used to show fuel savings for the platoon of 12.3% when the front truck uses ...
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