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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 5541 - 5560 of 36958 results
  • Perceived Risk of Loss of Driving Alternative Mobility Planning
    Perceived Risk of Loss of Driving & Alternative Mobility Planning
    Raue, Martina ;
    Coughlin, Joseph F.
    2019-12-15 | PDF
    Driving is the primary mode of transportation for the vast majority of adults in the United States and losing the ability to drive is a major threat to older adults’ independence, especially those living in low-density areas. Losing the ability to drive is a risk often less considered when thinking about older age. However, it may have a major impa ...
  • Understanding the Adoption of and Education About New Auto Technologies Among Older Adults
    Understanding the Adoption of and Education About New Auto Technologies Among Older Adults
    D'Ambrosio, Lisa
    2019-12-15 | PDF
    The rate of deployment of new automotive technologies into vehicles has seemingly increased over the past decade. Drivers face an array of technologies in new vehicles today that provide the driver with increased automation and direct support for the driving task. Unlike advances in safety around air bags or electronic stability control, or changes ...
  • Transit User Centered Empathy Experience
    Transit User Centered Empathy & Experience
    D'Ambrosio, Lisa
    2019-12-15 | PDF
    Two of the trends converging in the twenty-first century are that of an aging population in the US and across the globe and increases in urbanization. This century is projected to give rise to more megacities, cities and metro areas with populations in excess of ten million people. New York and Los Angeles are already considered megacities, and Chi ...
  • Smart Funding Strategies for Maintaining Interdependent Transportation Infrastructure Assets
    Smart Funding Strategies for Maintaining Interdependent Transportation Infrastructure Assets
    Wang, Zhaohua ;
    Li, Mingshu
    2019-12-14 | PDF
    This research project aims to cost-effectively maintain entire road network that consists of different transportation infrastructure assets, such as pavements, bridges, signs, etc. A well-maintained road network is critically important to support the nation’s mobility, economy, and security. To address this need, this research project explored seve ...
  • Integrating Equity into MPO Project Prioritization
    Integrating Equity into MPO Project Prioritization
    Williams, Kristine M ;
    Kramer, Jeffrey H.
    2019-12-13 | PDF
    Prioritization Transportation investments shape communities and quality of life by influencing the ability of residents to safely and conveniently access employment, health care, recreation, shopping, and other services. When identifying needs and selecting projects for funding, metropolitan planning organizations (MPOs) must consider multiple fact ...
  • IoT Home Transportation Trip Substitution Services
    IoT Home Transportation & Trip Substitution Services
    Lee, Chaiwoo
    2019-12-13 | PDF
    It has been discussed that the related behaviors and experiences – use of various transportation modes including driving, use of online shopping and technology-enabled delivery services, technology experiences, and needs around activities of daily living – may differ across people of different characteristics. For example, Garikapati et al. (2016) ...
  • Understanding Perceptions of Transportation for Livable Communities
    Understanding Perceptions of Transportation for Livable Communities
    Brady, Samantha ;
    Coughlin, Joseph F.
    2019-12-12 | PDF
    While access to transportation is a key factor driving utilization, attitudes and perceptions toward public transportation may also influence use. This study will investigate the pain points and difficulties people have accessing and using public transportation in their communities. Results of this survey will begin to illustrate specific character ...
  • Design and Evaluation of Sleeve Nut Through Tensile Testing
    Design and Evaluation of Sleeve Nut Through Tensile Testing
    Stolle, Cody S. ;
    Lechtenberg, Karla A.
    2019-12-11 | PDF
    The Midwest Pooled Fund Program has been developing a prototype of a non-proprietary, high-tension, four-cable, median barrier for use anywhere in a 6H:1V median V-ditch. This system incorporates four evenly-spaced cables, Midwest Weak Posts (MWPs) spaced at 8 to 16 ft (2.4 to 4.9 m) intervals, and a bolted, tabbed bracket to attach the cables to e ...
  • Developing a Taxonomy of Human Errors and Violations That Lead to Crashes
    Developing a Taxonomy of Human Errors and Violations That Lead to Crashes
    Khattak, Asad ;
    Ahmad, Numan
    2019-12-02 | PDF
    Driver errors and violations are highly relevant to the safe systems approach as human errors tend to be a predominant cause of crash occurrence. This study develops a deeper understanding of critical pre-crash driver errors and violations that have significant potential in reducing dangerous behaviors on roadways. A driver error and violation taxo ...
  • Identification of Low Growing Salt Tolerant Turfgrass Species Suitable for Use along Highway Right of Way Field Trials
    Identification of Low Growing, Salt Tolerant Turfgrass Species Suitable for Use along Highway Right of Way – Field Trials
    Engelhardt, Katharina A M ;
    Ratliff, Kristin
    2019-12-01 | PDF
    Three roadside trials were established in western MD, central MD, and eastern shore, to identify grass species that require little maintenance yet perform well. Each trial was composed of the same 12 treatments, including an unplanted control, the MDOT SHA turfgrass seed mix, several tall and fine fescue treatments, and several native grass treatme ...
  • Social Media Analysis for Transit Assessment
    Social Media Analysis for Transit Assessment
    Kim, Won Hwa ;
    Hyun, Kate Kyung
    2019-12-01 | PDF
    Stakeholders and transportation planners often use users’ feedback to assess transit services including ride hailing platforms and reflect them for future plans. Interestingly, social network services (SNS) provide such information in a large set of text by individuals exchanging event base attitude and sentiment. This information is very useful, h ...
  • Division of Engineering Research on Call Services Asymmetrical Deformation of Thermoplastic Pipe Analysis
    Division of Engineering Research on Call Services: Asymmetrical Deformation of Thermoplastic Pipe Analysis
    White, Kevin ;
    Sargand, Shad
    2019-12-01 | PDF
    This study investigated asymmetric deformation (racking) of installed thermoplastic pipe. Ohio Department of Transportation (ODOT) construction records were reviewed to determine the extent of racking noted within Item 611 Conduit Evaluations. Next, a rational method for assessing racking was developed within the framework of the AASHTO LRFD Bridge ...
  • Assessing the Effectiveness of Connected Vehicle Technologies based on Driving Simulator Experiments
    Assessing the Effectiveness of Connected Vehicle Technologies based on Driving Simulator Experiments
    Wu, Yina ;
    Yue, Lishengsa
    2019-12-01 | PDF
    Connected vehicle technology is expected to reduce crashes and improve roadway safety overall despite its effect being dependent on the content of crash scenarios. The reason behind this is that the heterogeneity between crash scenarios may cause variation in a driver’s perception and interpretation of the crash scenarios. Further, the heterogeneit ...
  • Improving Durability of Asphalt Mixtures
    Improving Durability of Asphalt Mixtures
    Shuler, Scott
    2019-12-01 | PDF
    Some of the hot mix asphalt pavements constructed for CDOT prior to 2016 have demonstrated premature cracking and raveling distress. The appearance of these pavements is reported to be that of pavements which contain lower than desirable asphalt binder content. However, quality control and quality assurance data obtained from these projects indicat ...
  • Assessing Crash Risks of Evacuation Traffic: A Simulation-based Approach [supporting datasets]
    Hasan, Samiul ;
    Rahman, Rezaur
    2019-12-01 | PDF
    Recently, hurricanes have caused major concern for transportation agencies and policymakers attempting to find better evacuation strategies. This was especially evident after Hurricane Irma, which forced about 6.5 million Floridians to evacuate the state. This mass evacuation caused a significant amount of delays on state highways due to heavy cong ...
    Dataset Supporting Files
  • Inspiring Transportation Careers With K12 Curriculum Activities
    Inspiring Transportation Careers With K-12 Curriculum Activities
    Willis, Olivia ;
    Akin, Michelle
    2019-12-01 | PDF
    Shortages in the transportation industry have resulted in an increasing need to be able to attract new employees. Two methods of outreach that have been successful at increasing awareness and interest in transportation careers in local youth have been working directly with students and training the teachers. This project worked directly with studen ...
  • Feasibility of Using HandHeld Dynamic Cone Penetrometer for Analyzing Soft Subgrade Quickly
    Feasibility of Using Hand-Held Dynamic Cone Penetrometer for Analyzing Soft Subgrade Quickly
    Islam, Md Rashadul ;
    Kalevela, Sylvester A.
    2019-12-01 | PDF
    Colorado Department of Transportation (CDOT) does not have evidence how the Dynamic Cone Penetrometer (DCP) test results correlate to other test methods (say, R-value) for Colorado’s pavement subgrade. Even, the correlation between single-mass, and dual-mass DCP (which are two ways of conducting DCP test) is still unknown. Pavement Mechanistic-Empi ...
  • Pavement Life Comparison for Different Traffic Scenarios
    Pavement Life Comparison for Different Traffic Scenarios
    Zhou, Fujie ;
    Hu, Sheng
    2019-12-01 | PDF
    Because most automated vehicles (AVs) are programmed to follow a set path and maintain a lateral position in the center of the lane, over time significant pavement rutting will occur. This study directly measured AV lateral wandering patterns. It was found that the wandering patterns of both AVs and human-driven vehicles could be modeled with a nor ...
  • Evaluation Methods and Techniques Advanced Transportation and Congestion Management Technologies Deployment Program
    Evaluation Methods and Techniques: Advanced Transportation and Congestion Management Technologies Deployment Program
    Petrella, Margaret ;
    Chajka-Cadin, Lora
    2019-12-01 | PDF
    The Fixing America's Surface Transportation Act or "FAST Act" established the Advanced Transportation Congestion Management Technologies Deployment (ATCMTD) Program to make competitive grants for the deployment of advanced transportation technologies. The legislation also mandates reporting requirements for the grantees, including data on the benef ...
  • Technology Influence on Travel Demand and Behaviors
    Technology Influence on Travel Demand and Behaviors
    Sisiopiku, Virginia P. ;
    Hadi, Mohammed
    2019-12-01 | PDF
    Over the last decade, the popularity of Transportation Network Companies (TNCs) as a mode of travel has been increasing at a steady pace, even in medium size cities. However, the determinants that influence transportation users to adopt TNCs as a preferred mode choice are still not well understood, nor are the impacts of such preferences on their t ...
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