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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 4201 - 4220 of 36908 results
  • Spill Behavior Detection and Mitigation for Emerging Nontraditional Marine Fuels
    Spill Behavior, Detection, and Mitigation for Emerging Nontraditional Marine Fuels
    Kass, Michael D ;
    Sluder, C Scott
    2021-03-01 | PDF
    The topic of the research is the predicted impact of large spills or releases of alternative marine fuels. The fuels covered are those that have been identified as potential future fuels for the marine shipping sector by industry experts and government agencies overseeing the development of renewable and low-carbon fuels. Several of these fuels are ...
  • A Comprehensive Literature Review Detailing the Methods for Setting Speed Limits in Urban Areas
    A Comprehensive Literature Review Detailing the Methods for Setting Speed Limits in Urban Areas
    Figliozzi, Miguel ;
    Unnikrishnan, Avinash
    2021-03-01 | PDF
    Many cities in Oregon are requesting a comprehensive review of speed zoning guidelines and existing procedures for streets with high volumes of active travelers. Cities are proposing alternative speed zoning guidelines that are starkly different from existing guidelines based on the 85th percentile speed distribution. The alternative guidelines and ...
  • Use of Material Delivery Management System MDMS for Asphalt Paving Applications
    Use of Material Delivery Management System (MDMS) for Asphalt Paving Applications
    Embacher, Rebecca
    2021-03-01 | PDF
    Each year, the Minnesota Department of Transportation (MnDOT) is affected by the large volume of data produced each day on highway construction projects. Significant time and resources are spent toward proper documentation, organization, mining, and review and use of this information. Intelligent construction technologies (ICT) are continuously bei ...
  • HFST Before and After Safety Analysis
    HFST Before and After Safety Analysis
    Bledsoe, Jay F ;
    Lee, Hyung S
    2021-03-01 | PDF
    Due to its high potential for safety improvement, MoDOT deployed High Friction Surface Treatments (HFST) at several areas experiencing high crash rates since 2013. To determine if the HFSTs are providing the expected results and if MoDOT’s HFST program is effective, this study was conducted with the primary objective of evaluating MoDOT’s existing ...
  • Evaluating the Safety Impacts of Flashing Yellow Permissive LeftTurn Indications in Massachusetts
    Evaluating the Safety Impacts of Flashing Yellow Permissive Left-Turn Indications in Massachusetts
    Tainter, Francis ;
    Fitzpatrick, Cole
    2021-03-01 | PDF
    The 2009 edition of the Manual on Uniform Traffic Control Devices (MUTCD) introduced the flashing yellow arrow (FYA) as a permissive left-turn indication. Massachusetts recently implemented this novel traffic control device through a statewide retrofitting project at over 350 traditional protected-permissive left-turn traffic signals. A before/afte ...
  • Impact of Center Line Rumble Strips and Shoulder Rumble Strips on all Roadway Departure Crashes in Louisiana Twolane Highways
    Impact of Center Line Rumble Strips and Shoulder Rumble Strips on all Roadway Departure Crashes in Louisiana Two-lane Highways
    Sun, Xiaoduan ;
    Rahman, M Ashifur
    2021-03-01 | PDF
    To prevent roadway departure crashes, rumble strips have been installed on Louisiana’s two-lane highways. This study investigated the impact of rumble strips on 1,593.09 miles of two-lane highways in Louisiana, on which centerline rumble strips (CLRS) and shoulder rumble strips (SRS) were installed between years 2010 and 2016. The comprehensive eva ...
  • Assessment of Prospective MileageBased Fee System to Replace Fuel Taxes for Passenger Vehicles in Pennsylvania
    Assessment of Prospective Mileage-Based Fee System to Replace Fuel Taxes for Passenger Vehicles in Pennsylvania
    Matthews, H Scott ;
    Fischbeck, Paul S
    2021-03-01 | PDF
    In this proof-of-concept for Pennsylvania, the authors leverage about 120 million records from annual vehicle inspections across a fifteen-year period, to develop high-resolution estimates of annual vehicle miles travelled (VMT) per vehicle aggregated at the state, county, and ZIP code level. Web scraping was used to assess the fuel economy of each ...
  • Balanced Mixture Design Implementation Support
    Balanced Mixture Design Implementation Support
    West, Randy ;
    Yin, Fan
    2021-03-01 | PDF
    This project sought to evaluate performance-based methodologies for asphalt mix design and develop a preliminary balanced mix design (BMD) specification for the Wisconsin Department of Transportation (WisDOT) projects. The work plan included conducting a literature review, interviewing Wisconsin mix designers, conducting a BMD workshop, benchmarkin ...
  • Adaptive Management To Improve DeIcing Operations
    Adaptive Management To Improve De-Icing Operations
    Baker, Lawrence A ;
    Wilson, Brue
    2021-03-01 | PDF
    Road de-icing is a major cause of chloride impairment in Minnesota’s urban waters. The goal of our study was to develop an adaptive management (AM) strategy to reduce chloride impacts caused by de-icing operations. The AM process was informed by our analysis of chloride movement in a residential watershed, providing feedback to the street departmen ...
    Supporting Files
  • Implementation of a Protocol for Acceptance of New OverCoating Systems for Steel Surfaces
    Implementation of a Protocol for Acceptance of New Over-Coating Systems for Steel Surfaces
    Balaguru, Perumalsamy ;
    Roy, Sougata
    2021-03-01 | PDF
    This project was undertaken to develop a procedure to accept new coating systems for over-coating of steel surfaces and the results are presented in three parts. Section I and Section II covers acceptance procedure and details of information needed based on accelerated corrosion test. Section III presents a model for predicting field service life u ...
  • Analysis of Speed Profiles and Evaluation of Dynamic Signs in Kansas Work Zones
    Analysis of Speed Profiles and Evaluation of Dynamic Signs in Kansas Work Zones
    Cunningham IV, Jack R ;
    Anderson, Samantha M
    2021-03-01 | PDF
    Work zones are essential for maintaining and improving roadways in the United States. Although reduced speed limits are used throughout work zones to increase worker and driver safety, motorists often do not obey these speed limits. From 2016 to 2017, 799 work zone fatalities occurred, an increase of 3%, with vehicle speed as a main contributing fa ...
  • Workforce Planning and Human Resource Development Strategies for Minnesotas Public Transportation Agencies
    Workforce Planning and Human Resource Development Strategies for Minnesota’s Public Transportation Agencies
    Bartlett, Kenneth ;
    Collins, Joshua
    2021-03-01 | PDF
    This study explored and examined possible causes of the workforce shortage in Minnesota’s transportation industry. Appropriate human resource strategies were proposed in response. Four interrelated approaches were undertaken: 1) a literature review, 2) a questionnaire, 3) audio interviews, and 4) integration of data to generate recommendations for ...
  • Informing New ADOT Strategies for Meeting Federal DBE Requirements
    Informing New ADOT Strategies for Meeting Federal DBE Requirements
    Pryor, Debra ;
    Meyers, Deborah
    2021-03-01 | PDF
    As a recipient of US Department of Transportation funding, the Arizona Department of Transportation (ADOT) is required to administer a disadvantaged business enterprise (DBE) program aimed at providing DBEs fair opportunities to compete for federally funded transportation contracts. State departments of transportation (DOTs) are required to set an ...
  • 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 ...
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