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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 4901 - 4920 of 36908 results
  • Understanding Access to Grocery Stores in Food Deserts in Baltimore City
    Understanding Access to Grocery Stores in Food Deserts in Baltimore City
    Chavis, Celeste ;
    Jones, Anita
    2020-07-21 | PDF
    As American cities have seen a change in land uses in urban areas, with stores moving to suburban areas increasing the reliance on cars, many urban areas are left with a lack of accessible quality food options. These food insecure areas, commonly known as food deserts, where residents lack both access and sufficient economic resources to purchase h ...
  • Development of a MASH Test Level 4 Steel SideMounted BeamandPost Bridge Rail
    Development of a MASH Test Level 4 Steel, Side-Mounted, Beam-and-Post, Bridge Rail
    Pena, Oscar ;
    Faller, Ronald K.
    2020-07-20 | PDF
    A new steel, side-mounted, beam-and-post, bridge rail was designed, crash-tested, and evaluated according to safety performance guidelines included in the American Association of State Highway and Transportation Officials Manual for Assessing Safety Hardware, Second Edition (MASH 2016) for Test Level 4 (TL-4). The new bridge rail system was designe ...
  • Development of Iowa DOT Combination Bridge Separation Barrier with Bicycle Railing Phase II
    Development of Iowa DOT Combination Bridge Separation Barrier with Bicycle Railing – Phase II
    Bielenberg, Robert W. ;
    Benson, Michael K
    2020-07-17 | PDF
    A combination bridge rail was designed and crash tested for Iowa Department of Transportation (Iowa DOT) for use alongside a pedestrian/bicycle bridge pathway that would satisfy Manual for Assessing Safety Hardware (MASH) 2016 Test Level 2 (TL-2) criteria. Currently, Iowa DOT employs a combination bridge rail that utilizes a concrete parapet that h ...
  • MASH 2016 Evaluation of the Modified Thrie Beam System
    MASH 2016 Evaluation of the Modified Thrie Beam System
    Bielenberg, Robert W. ;
    Faller, Ronald K.
    2020-07-16 | PDF
    This report documents the evaluation of the New Jersey Department of Transportation (NJDOT) modified thrie beam (MTB) system in both a single-sided roadside configuration and a dual-sided median configuration under Manual for Assessing Safety Hardware 2016 (MASH 2016) Test-Level 3 (TL-3) criteria. The MTB system was previously tested and approved u ...
  • Effects of Charging Infrastructure Characteristics on Electric Vehicle Preferences of New and Used Car Buyers in the United States [supporting datasets]
    MacKenzie, Don
    ORCID ICON IMG
    2020-07-15 | PDF
    The used car market is a critical element for the mass adoption of electric vehicles (EVs). However, most previous studies on EV adoption have focused only on new car markets. This article examines and compares the effects of charging infrastructure characteristics on the preferences for EVs among both new and used car buyers. This study is based o ...
    Dataset Supporting Files
  • Durable and Sustainable Concrete Through Performance Engineered Concrete Mixtures
    Durable and Sustainable Concrete Through Performance Engineered Concrete Mixtures
    Cavalline, Tara L ;
    Tempest, Brett Q
    2020-07-13 | PDF
    As funds to construct, maintain, and preserve our highway infrastructure become increasingly stretched, it is imperative that the criteria for selection of concrete mixtures and acceptance of placed concrete reliably ensure durability. Over the past several decades, research has led to new understanding of deterioration mechanisms, advancements in ...
  • Review and Refinement of SDDOTs LRFD Shallow Foundation Design Method
    Review and Refinement of SDDOT’s LRFD Shallow Foundation Design Method
    Lingwall, Bret ;
    Nam, Soonkie
    2020-07-09 | PDF
    The objective of this project was to conduct a comprehensive review of Load Resistance Factor Design (LRFD) for bridge and wall shallow foundations. LRFD is a limit state design methodology based on reliability and probability. Specifically, this study investigated the concept, application, and implementation status of LRFD in shallow foundation de ...
  • Electric Fleet Adoption Strategies – Addressing Storage and Infrastructure Needs [supporting datasets]
    Raju, Arun S.K. ;
    Vu, Alexander
    2020-07-09 | PDF
    Significant electrification of the transportation sector is necessary for the State to achieve several important greenhouse gas (GHG) reduction and renewable energy targets. The State’s electricity generation and transmission capabilities must increase in order to meet the demand generated by increasing levels of fleet electrification. The increase ...
    Dataset Supporting Files
  • Modeling and Enhancing Freight Mobility in the Philadelphia Region
    Modeling and Enhancing Freight Mobility in the Philadelphia Region
    Qian, Sean ;
    Choudhry, Arnav
    2020-07-07 | PDF
    This research project analyzes freight transportation data and enhances the regional freight transportation model to better estimate and forecast truck travel in the Philadelphia region. In particular, this project infers truck activity from global positioning system (GPS) traces data (acquired by Delaware Valley Regional Planning Commission). Iden ...
  • Labeling Roads with Different Types of Automated Driving Functional Requirements using Machine Learning
    Labeling Roads with Different Types of Automated Driving Functional Requirements using Machine Learning
    Zhao, Ding ;
    Xu, Mengdi
    2020-07-07 | PDF
    Automated vehicles (AVs) should be deployed gradually and geometrically selectively to ensure safety. Frequent collisions of AVs in certain driving scenarios, such as in dark streets or crowded areas, have posed wide concerns of AV safety. People want to know what kinds of driving circumstances or areas are easy for AVs and what are relatively hard ...
  • Using Big Data to Assess Corridor Safety Performance at Approaches to Freeway Interchanges
    Using Big Data to Assess Corridor Safety Performance at Approaches to Freeway Interchanges
    Dastgiri, Maryam Shirinzadeh ;
    Dixon, Karen K.
    2020-07-01 | PDF
    Urban arterials near freeway interchanges are vital elements of urban road infrastructures. They connect freeway networks with high mobility and low access to urban networks with lower mobility and higher access. This study investigates the operational safety of these elements and tries to find the relationship between geometric elements of roadway ...
  • Resilience and Sustainability of Underground Transportation Infrastructure Climate Vulnerability and Sustainability Assessments
    Resilience and Sustainability of Underground Transportation Infrastructure: Climate Vulnerability and Sustainability Assessments
    Rodriguez-Nikl, Tonatiuh ;
    Mazari, Mehran
    2020-07-01 | PDF
    The literature related to sustainability and resilience in underground transportation infrastructure (UTI) was reviewed. Two planning frameworks were investigated for their suitability to UTI and to illustrate the application of the framework for UTI. The first framework investigated was the Vulnerability Assessment Scoring Tool (VAST). VAST was fo ...
  • CornBased Deicers
    Corn-Based Deicers
    Yellavajjala, Ravi Kiran ;
    Lavadiya, Dayakar Naik
    2020-07-01 | PDF
    Scaling up the production of agro-byproduct-based deicer is challenging as their yield is far less than the demand. Since corn is the most planted crop in the United States, the current study focuses on developing corn-based deicers that possess lower freezing point depression, enhanced ice melting capacity, and corrosion inhibition properties. The ...
    Supporting Files
  • Interdisciplinary Education Outreach with Traffic Sensor Build Kits
    Interdisciplinary Education Outreach with Traffic Sensor Build Kits
    Hernandez, Sarah ;
    Crews, Mariah B
    2020-07-01 | PDF
    The goal of this project was to attract K-12 students to transportation engineering careers through Science, technology, engineering, and mathematics (STEM) outreach programs. To accomplish this goal, the object of the project was to design and implement maritime freight oriented educational outreach activities centered on traffic sensing technolog ...
  • Titan An Interactive WebBased Platform for Transportation Data Integration and Analytics
    Titan: An Interactive, Web-Based Platform for Transportation, Data Integration, and Analytics
    Shu, Xiaofan
    2020-07-01 | PDF
    State transportation agencies regularly collect and store various types of data for different uses such as planning, traffic operations, design, and construction. These large datasets contain treasure troves of information that could be fused and mined, but the size and complexity of data mining require the use of advanced tools such as big data an ...
  • Freeways and Farms Veggielution Taylor Street Urban Farms Study
    Freeways and Farms: Veggielution & Taylor Street Urban Farms Study
    Baur, Joshua ;
    Estrada, Ashley
    2020-07-01 | PDF
    This report presents the results of a project conducted by researchers at San Jose State University in partnership with Veggielution and Taylor Street Farm staff, funded by the Mineta Transportation Institute in San Jose, CA. The research team interviewed staff and volunteer farm workers to explore how nearby roadways impact experiences at farm sit ...
  • The Impacts of Emerging Mobility Options and Vehicle Technologies on Travel Behavior
    The Impacts of Emerging Mobility Options and Vehicle Technologies on Travel Behavior
    Jin, Xia ;
    Rahimi, Alireza
    2020-07-01 | PDF
    This report presents a study that investigated potential travel behavior changes in light of automated, connected, electric, and shared-use vehicle (ACES) technologies. Three main aspects of choice behavior were investigated: AV adoption and willingness to pay (WTP), shared mobility adoption, and mode choice. Particularly, this study focuses on exp ...
  • Statewide Mobility Management Factors Affecting the Creation and Success of Networks
    Statewide Mobility Management: Factors Affecting the Creation and Success of Networks
    Sriraj, P S ;
    Hall, Em
    2020-07-01 | PDF
    This report presents the findings of phase two of a research project that examines statewide mobility management programs and the individuals who lead them. Phase one of the project combined publicly available information with data collected via an online survey sent to 49 transportation professionals, each representing a different state. Twenty-on ...
  • Integrative Vehicle Infrastructure Traffic System iVITS Control in Connected Cities
    Integrative Vehicle Infrastructure Traffic System (iVITS) Control in Connected Cities
    Kamga, Camille ;
    Mudigonda, Sandeep
    2020-07-01 | PDF
    With the rapid rise in smartphones and Global Positioning System (GPS)-enabled devices, vehicles are becoming increasingly connected. Some newly manufactured vehicles are equipped with devices that provide information about vehicle characteristics such as speed and acceleration, and aftermarket devices also share vehicle data. This information in a ...
  • Vehicle on Shoulder and Crash Correlation or Causation
    Vehicle on Shoulder and Crash — Correlation or Causation?
    Chen, Mei ;
    Zhang, Xu
    2020-07-01 | PDF
    This study sought to evaluate the relationships between vehicles on shoulder, congestion, and crashes. Three pertinent datasets on interstates were obtained and then integrated using a spatiotemporal approach. The analysis showed that about 36% of the crashes had vehicle on shoulder present in their vicinity, defined as 0.25 miles upstream and down ...
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