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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 4041 - 4060 of 36908 results
  • Research and Education for Optimizing the Development and Implementation of an Unmanned Aircraft Program at the Nebraska Department of Transportation
    Research and Education for Optimizing the Development and Implementation of an Unmanned Aircraft Program at the Nebraska Department of Transportation
    Woldt, Wayne ;
    Starr, Jon
    2021-05-19 | PDF
    This report describes the development and implementation of an Unmanned Aircraft System Program at the Nebraska Department of Transportation (NDOT). The project involved the selection and purchase of appropriate UAS and imaging systems for NDOT, education and training for NDOT personnel with classroom and hands-on operation of UAS with the goal of ...
  • Utilization of Traffic Speed Deflectometer for Pavement Management
    Utilization of Traffic Speed Deflectometer for Pavement Management
    Huynh, Nathan ;
    Gassman, Sarah
    2021-05-18 | PDF
    This project investigated how the Traffic Speed Deflectometer (TSD) data the South Carolina Department of Transportation (SCDOT) obtained as part of the pooled fund studies (i.e., TPF-5(282) and 5(385)) can be used to improve the selection of candidate projects for rehabilitation. The analysis using approximately 950 miles of TSD data collected on ...
  • FlyBy Image Processing for RealTime Congestion Mitigation
    Fly-By Image Processing for Real-Time Congestion Mitigation
    Uddin, Nasim ;
    Williams, Billy M.
    2021-05-13 | PDF
    Traffic monitoring is the centerpiece of congestion mitigation and traffic management. Whilst surveillance technologies have matured enough to provide informative depiction for the traffic, the current state-of-the-art systems cannot support immediate congestion problems. Proactive congestion mitigation requires a) real-time surveillance for traffi ...
  • Hydraulic Inspection Vehicle Explorer HIVE Culvert Upgrade
    Hydraulic Inspection Vehicle Explorer (HIVE) Culvert Upgrade
    Huston, Dryver ;
    Xia, Tian
    2021-05-11 | PDF
    The Vermont Agency of Transportation (VTrans) has adopted a policy requiring all culverts to be inspected every 5 years, resulting in around 9,600 small culverts needing to be inspected annually. Many of these culverts have small diameters that preclude human inspection. This report describes the design, fabrication and testing of a lightweight and ...
  • Analyzing the Effects of COVID19 on Human Mobility and Transit Ridership in the Pacific Northwest Region
    Analyzing the Effects of COVID-19 on Human Mobility and Transit Ridership in the Pacific Northwest Region
    Swoboda-Colberg, Skye ;
    Huang, Li
    2021-05-10 | PDF
    This study investigated the effects of COVID-19 on trip reductions and decreases in transit ridership in the Pacific Northwest region of the United States, encompassing Washington, Oregon, Idaho, and Alaska. By utilizing multiple data sources, the authors found that work-related trips in the region declined by more than 30 percent since March of 20 ...
  • Smart and Environmentally Friendly Winter Maintenance Solutions for Safe Winter Mobility Use of a Microwave Method to Prototype Electrically Conductive Concrete
    Smart and Environmentally Friendly Winter Maintenance Solutions for Safe Winter Mobility: Use of a Microwave Method to Prototype Electrically Conductive Concrete
    Nassiri, Somayeh ;
    Moman, Abdullah
    2021-05-04 | PDF
    Electrically conductive pavement materials have shown potential as self-deicing pavements under passed electrical current. In this project, a method using microwaves was used to evaluate the electrical conductivity of pavement materials for the purpose of melting snow and ice and reducing the need for sanding and salting in the winter. The prelimin ...
  • Safety in Numbers Developing Improved Safety Predictive Methods for Pedestrian Crashes at Signalized Intersections in Utah Using Push ButtonBased Measures of Exposure
    Safety in Numbers? Developing Improved Safety Predictive Methods for Pedestrian Crashes at Signalized Intersections in Utah Using Push Button-Based Measures of Exposure
    Singleton, Patrick A. ;
    Mekker, Michelle
    2021-05-01 | PDF
    The focus of this study was threefold: (1) to estimate models of pedestrian crash frequency at signalized intersections; (2) to develop safety performance functions and crash modification factors for better interpretation and application of models’ results; and (3) to examine whether the “safety in numbers” effect applies to pedestrian safety in th ...
  • A Synthesis on Data Mining Methods and Applications for Automated Fare Collection AFC Data
    A Synthesis on Data Mining Methods and Applications for Automated Fare Collection (AFC) Data
    Cevallos, Fabian ;
    Turino, Lilibeth
    2021-05-01 | PDF
    Automated Fare Collection (AFC) systems have been widely adopted by transit agencies around the world. AFC systems can provide a bias-free and low-cost approach to obtaining long-term continuous observations of transit passenger travel behavior. The availability of AFC data can help examine the behavior of passengers and the demand characteristics ...
  • RealWorld Data Driven Characterization of Urban Human Mobility Patterns
    Real-World Data Driven Characterization of Urban Human Mobility Patterns
    Jauhri, Abhinav ;
    Shen, John Paul
    2021-05-01 | PDF
    Human movement in urban areas is a complex phenomenon to analyze and understand. The geographical spread of human movement, described by locations between which individuals tend to travel, varies from city to city. The geographical spread of such locations within a city would also vary with time. This research explores how to formally analyze and u ...
  • Assessment of Asbestos Containing Materials in Idaho Bridges
    Assessment of Asbestos Containing Materials in Idaho Bridges
    Ibrahim, Ahmed A ;
    Arowojolu, Olaniyi
    2021-05-01 | PDF
    The Idaho Transportation Department (ITD) has more than 4,000 highway bridges under its control in the State of Idaho. For bridges built before 1980, the Environmental Protection Agency (EPA) requires State Transportation Departments to provide inspection reports concerning the presence of asbestos materials for any bridge that is eligible for majo ...
  • Evaluating Performance and Benefits of Road Reconfigurations in Tennessee
    Evaluating Performance and Benefits of Road Reconfigurations in Tennessee
    Aryal, Sameer ;
    Cherry, Christopher
    2021-05-01 | PDF
    A vital issue evaluating road reconfiguration projects is quantifying the benefits provided to the corridor and surrounding community. Based on past studies, reconfiguring an automobile-oriented travel lane to accommodate other modes of transportation is found to have neutral, if not progressive, effects on factors such as livability, safety, and e ...
  • Mitigation of Corrosion in Continuously Reinforced Concrete Pavement Volume 1
    Mitigation of Corrosion in Continuously Reinforced Concrete Pavement Volume 1
    Jones, Allen ;
    Wehbe, Nadim I.
    2021-05-01 | PDF
    An evaluation of CRCP was conducted in order to determine the extent of possible corrosion of CRCP on selected interstates in South Dakota. General observations showed there were sections of severe and localized reinforcement corrosion at some crack locations. Crack mapping, chloride tests profiles, scanning electron microscopy (SEM) analyses, and ...
  • Analytical Framework for Life Cycle and Performance Assessment of Equipment Programs
    Analytical Framework for Life Cycle and Performance Assessment of Equipment Programs
    Liu, Xiaoyue Cathy ;
    Yi, Zhiyan
    2021-05-01 | PDF
    In this project, we analyzed the optimal life cycles for three types of trucks for the Utah Department of Transportation (UDOT) using a macro-level approach. The types of truck include loaders, graders, and sweepers. The life cycle analysis follows a similar procedure with respect to the optimal life cycle analysis for Class 8 snowplow trucks that ...
  • Life Extension of FatigueDamaged Highway Rail and Transit Bridges
    Life Extension of Fatigue-Damaged Highway, Rail, and Transit Bridges
    Tracy, Alexandra ;
    Sause, Richard
    2021-05-01 | PDF
    Fatigue is a common and potentially very damaging occurrence in metallic structures, including steel bridges. There have been numerous studies throughout the last two centuries on fatigue life, but challenges of preventing fatigue crack growth are still unresolved. The most widespread method of repair and retrofitting involves drilling a crack-arre ...
  • The Effectiveness of Organic Matter Amendments in Promoting Hydric Soil Conditions and Overall Health of Mitigation Wetlands Phase II
    The Effectiveness of Organic Matter Amendments in Promoting Hydric Soil Conditions and Overall Health of Mitigation Wetlands – Phase II
    Baldwin, Andrew ;
    Yarwood, Stephanie
    2021-05-01 | PDF
    Organic amendments did not promote hydric soil conditions in wetlands as originally hypothesized. Instead, soil saturation strongly determines if soils are hydric. Hydric soils can be tested using several different methods, and redox electrodes appeared to give more favorable test results than dipyridyl strips in unsaturated conditions. IRIS can al ...
  • Applying an Equity Lens to Automated Payment Solutions for Public Transportation [supporting datasets]
    Golub, Aaron ;
    Brown, Anne
    2021-05-01 | PDF
    The research team carried out intercept surveys in Portland, Gresham, Eugene and Denver in July, August and September of 2019. In total, 2,303 riders completed intercept surveys across the three regions. Our surveys were designed to take place during short “intercept” interviews between the research staff and the rider, typically at transit station ...
    Dataset Supporting Files
  • Developing Recommendations for Allowable RAP Contents in Idaho Asphalt Mixes
    Developing Recommendations for Allowable RAP Contents in Idaho Asphalt Mixes
    Mishra, Debakanta (Deb)
    ORCID ICON IMG
    2021-05-01 | PDF
    This research study focused on evaluating the effects of high recycled Asphalt Pavement (RAP) contents on asphalt mix performance. Until recently, the Idaho Transportation Department (ITD) did not impose any restriction on the amount of RAP allowed in an asphalt mix. As a result, pavement sections were constructed in Idaho with up to 54 percent RAP ...
  • Rural Transit Fact Book 2021
    Rural Transit Fact Book 2021
    Mattson, Jeremy ;
    Mistry, Dilip
    2021-05-01 | PDF
    Public transportation plays a fundamental role in the livability of communities of all sizes. The Rural Transit Fact Book provides information on transit service availability and cost to help the transit industry in the United States provide efficient and effective service to meet rural community mobility needs. Financial and operating statistics c ...
  • Applying an Equity Lens to Automated Payment Solutions for Public Transportation
    Applying an Equity Lens to Automated Payment Solutions for Public Transportation
    Golub, Aaron ;
    Brown, Anne
    2021-05-01 | PDF
    Many transit agencies plan to automate their fare collection and limit the use of cash for payment, with the goals of improving boarding and data collection while lowering operating costs. Still, about 10% of adults in the United States lack a bank account or credit card, and many either rely on restrictive cell-phone data plans or don’t have acces ...
  • Supporting Transportation System Management and Operations Using Internet of Things Technology
    Supporting Transportation System Management and Operations Using Internet of Things Technology
    Yang, Hong ;
    Shen, Yuzhong
    2021-05-01 | PDF
    Low power wide-area network (LPWAN) technology aims to provide long range and low power wireless communication. It can serve as an alternative technology for data transmissions in many application scenarios (e.g., parking monitoring and remote flood sensing). In order to explore its feasibility in transportation systems, this project conducted a re ...
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