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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 4481 - 4500 of 36019 results
  • 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 ...
  • Transportation Infrastructure Asset Damage Cost Recovery Correlated with Shale OilGas Recovery Operations in Louisiana
    Transportation Infrastructure Asset Damage Cost Recovery Correlated with Shale Oil/Gas Recovery Operations in Louisiana
    Wu, Zhong ;
    Liu, Yilong
    2020-07-01 | PDF
    The rapid growth of shale gas exploration imposed a large number of heavy truck trips on Louisiana roadways. It is necessary to estimate the impact of the shale-gas related traffic. This study aimed to estimate the impact of the shale-gas related overweight truck trips on Louisiana roadways at the network and project level. RStudio software was emp ...
  • Evaluating the Use of Recycled and Sustainable Materials in SelfConsolidating Concrete for Underground Infrastructure Applications
    Evaluating the Use of Recycled and Sustainable Materials in Self-Consolidating Concrete for Underground Infrastructure Applications
    Mazari, Mehran ;
    Aval, Siavash F
    2020-07-01 | PDF
    Self-Consolidating Concrete (SCC), also known as self-compacting concrete, is a type of hydraulic cement concrete that easily forms around the reinforcement without segregation. The use of recycled fibers in the SCC mix, affect the compressive strength, tensile strength and crack initiation and propagation. The main objective of this study was to i ...
  • An Integrated Approach to Capture Construction Workers Response towards Safety Alarms using Wearable Sensors and Virtual Reality
    An Integrated Approach to Capture Construction Workers’ Response towards Safety Alarms using Wearable Sensors and Virtual Reality
    Zou, Zhengbo ;
    Bernardes, Suzana Duran
    2020-07-01 | PDF
    Despite the continuous efforts from federal and state agencies to improve safety at traffic work zones, incidents continue to occur, resulting in 675 fatalities in the U.S. during the last decade. Current safety measures at work zones, such as visual and audible alarms are ineffective due to the lack of calibration studies to evaluate the attention ...
  • Measures of Freight Network Resiliency During the Covid19 Pandemic
    Measures of Freight Network Resiliency During the Covid-19 Pandemic
    Hernandez, Sarah V ;
    Balthrop, Andrew
    2020-07-01 | PDF
    Recent headlines depict significant shifts in operations within the freight community in particular, e.g., HOS laws suspended at a national level for the first time in 82 years; national carriers shifting operations completely to grocery supply chains; fleet operators laying off employees in response to manufacturing closures. As a result of the cu ...
  • Putting Research Into Practice Learning Guides Preserve Expertise of Retiring Workers Summary
    Putting Research Into Practice: Learning Guides Preserve Expertise of Retiring Workers [Summary]
    Johnson, Peter ;
    Stading, Tanja
    2020-07-01 | PDF
    MnDOT developed three knowledge books that preserve the expertise of departing engineers with over 100 years of combined experience in key topic areas. The information is presented in a multimedia format using slides, documents and videos. The knowledge books represent the following topics: Concrete Pavement Rehabilitation and Repair (a slide prese ...
  • Assessment of Capacity Changes Due to Automated Vehicles on Interstate Corridors
    Assessment of Capacity Changes Due to Automated Vehicles on Interstate Corridors
    Heaslip, Kevin ;
    Goodall, Noah J.
    2020-07-01 | PDF
    This study was designed to assess capacity changes due to the introduction of connected vehicles (CVs) and automated vehicles (AVs) on Virginia freeway corridors. Overall, three vehicle types, including legacy vehicles (LVs); vehicles equipped with adaptive cruise control (ACC) (AVs); and vehicles equipped with cooperative adaptive cruise control ( ...
  • The Impact of Mobility as a Service on Transit Access
    The Impact of Mobility as a Service on Transit Access
    Chamberlin, Robert ;
    Haghighi, Nima
    2020-07-01 | PDF
    The emergence of a new mode, Mobility as a Service, has, to date, been most often characterized as the ridehailing mode provided by companies such as Uber and Lyft. If and when these private services evolve to incorporate autonomous vehicles, costs for this service will decrease, making it ever more competitive with other modes, both motorized and ...
  • Development of Specifications for HighPerformance Fiber Concrete for Nevada
    Development of Specifications for High-Performance Fiber Concrete for Nevada
    Malloy, Joe ;
    Sim, Chungwook 
    2020-07-01 | PDF
    The project stated with an extensive summary of construction practices and experiences from different state agencies. Besides, a detailed summary of state DOT specifications was included in the report. The main objective of this study was to develop a mix design adjustment method for High-Performance Fiber Reinforced Concrete (FRC) that would maint ...
  • Evaluating the Quality of Signal Operations Using Signal Performance Measures
    Evaluating the Quality of Signal Operations Using Signal Performance Measures
    Schultz, Grant G. ;
    Macfarlane, Gregory S
    2020-07-01 | PDF
    The Utah Department of Transportation (UDOT) has taken an active role in evaluating and monitoring traffic signal performance throughout the state of Utah. Automated traffic signal performance measures (ATSPM) have been adopted to collect data concerning the current and historical performance of signalized intersections to optimize mobility and man ...
  • Develop Guidelines and Design Program for HotMix Asphalts Containing RAP RAS and Other Additives through a Balanced MixDesign Process
    Develop Guidelines and Design Program for Hot-Mix Asphalts Containing RAP, RAS, and Other Additives through a Balanced Mix-Design Process
    Garcia, Vince ;
    Vieira, Denis
    2020-07-01 | PDF
    Asphalt mixtures must ideally exhibit acceptable cracking and rutting properties to perform well in major concern. Improving the durability and long-term performance of asphalt mixtures has become a major concern, especially with the rapidly increasing use of recycled materials, warm mix asphalt additives and modified binders. Given that available ...
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