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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 3581 - 3600 of 36908 results
  • Improved Disaster Management Through Automated Damage Assessment Using Unmanned Aerial Vehicles UAVs
    Improved Disaster Management Through Automated Damage Assessment Using Unmanned Aerial Vehicles (UAVs)
    Haddad, Rami J ;
    Gonzalez Bocanegra, Maria
    2021-11-01 | PDF
    Natural disasters cause devastating effects on transportation networks by causing significant damage and obstruction on frequently traveled roads. This report describes the design and implementation of an automated Unmanned Aerial Vehicle (UAV) based damage management using convolutional neural networks (CNNs). This system utilizes image processing ...
  • Estimating Switching Times of Actuated Coordinated Traffic Signals A Deep Learning Approach
    Estimating Switching Times of Actuated Coordinated Traffic Signals: A Deep Learning Approach
    Eteifa, Seifeldeen ;
    Rakha, Hesham A.
    2021-11-01 | PDF
    Acceleration and deceleration maneuvers at signalized intersections are a major hindrance to fuel-efficient vehicle operations. Green Light Optimal Speed Advisory (GLOSA) allows for the control of vehicles in a fuel-efficient manner but requires reliable estimates of signal switching times. This study attempts to utilize data from actuated coordina ...
  • Analytical Models for Traffic Congestion and Accident Analysis
    Analytical Models for Traffic Congestion and Accident Analysis
    Liu, Hongrui ;
    Shetty, Rahul Ramachandra
    2021-11-01 | PDF
    In the US, over 38,000 people die in road crashes each year, and 2.35 million are injured or disabled, according to the statistics report from the Association for Safe International Road Travel (ASIRT) in 2020. In addition, traffic congestion keeping Americans stuck on the road wastes millions of hours and billions of dollars each year. Using stati ...
  • Data Analyses from Seismic Instrumentation Installed on the I40 Bridge
    Data Analyses from Seismic Instrumentation Installed on the I-40 Bridge
    Pezeshk, Shahram ;
    Camp, Charles V
    2021-10-31 | PDF
    The Hernando De Soto I-40 Bridge spans over the Mississippi River connecting Tennessee and Arkansas. On May 11, 2021, this bridge was closed after detecting a fraction in one of the major 900-ft horizontal tension tie girders. Inspections conducted by officials from both the Tennessee and Arkansas departments of transportation revealed that the cra ...
  • TransportationRelated Behaviors and Attitudes A Survey of Floridas Aging Road Users
    Transportation-Related Behaviors and Attitudes: A Survey of Florida’s Aging Road Users
    Barrett, Anne ;
    Noblitt, Jessica
    2021-10-31 | PDF
    This project supported the efforts of Florida’s Safe Mobility for Life Coalition (SMFLC) to meet the aims outlined in Florida’s Aging Road User Strategic Safety Plan (ARUSSP), which include increasing aging road users’ safety and mobility. To better understand aging road users’ transportation-related behaviors and attitudes, a statewide online surv ...
  • Accelerating Mix Design for CementTreated Bases Project Summary
    Accelerating Mix Design for Cement-Treated Bases [Project Summary]
    Sebesta, Stephen ;
    Kim, Jinho
    2021-10-31 | PDF
    This project aimed to streamline CTB mixture design with an accelerated process and lab procedures similar to those recently developed for emulsified and foamed asphalt. By employing indirect tensile (IDT) strength from 4-in.- diameter, 2-in.-tall specimens, the accelerated mix design approach can produce results faster and with less material than ...
  • 06973 Predictive Mapping of Rare Plants Project Summary
    0-6973: Predictive Mapping of Rare Plants [Project Summary]
    Kafley, Hemanta ;
    Craven, Jordan
    2021-10-31 | PDF
    0-6973: Predictive Mapping of Rare PlantsRare plants are essential components of a functioning ecosystem. These species are often phenotypically unique or provide a specific ecosystem function. Rare plants may be limited in range, limited in population numbers, or a combination of both. These plants are often imperiled due to a combination of facto ...
  • Air Quality and HealthRelated Impacts of Traditional and Alternate Jet Fuels From Airport Aircraft Operations in the US
    Air Quality and Health-Related Impacts of Traditional and Alternate Jet Fuels From Airport Aircraft Operations in the U.S.
    Arter, Calvin A ;
    Buonocore, Jonathan J
    2021-10-26 | PDF
    Aviation emissions from landing and takeoff operations (LTO) can degrade local and regional air quality leading to adverse health outcomes in populations near airports and downwind. In this study we aim to quantify the air quality and health-related impacts from commercial LTO emissions in the continental U.S. for two recent years’ inventories, 201 ...
  • Synthesis Bridge Deck Drains
    Synthesis: Bridge Deck Drains
    Shahandashti, Mohsen ;
    Chao, Shih-Ho (Simon)
    2021-10-01 | PDF
    Bridge deck drains are an integral component of bridges helping in the removal of runoff. The debris carried by the runoff clog drains frequently. The objective of this project is to synthesize and evaluate existing bridge deck drains and provide recommendations for the design, construction, and maintenance of bridge deck drains. The research findi ...
  • Examining the Impact of TransportationRelated Barriers on SelfPerceived Physical Health Among Adults in the United States
    Examining the Impact of Transportation-Related Barriers on Self-Perceived Physical Health Among Adults in the United States
    Baiden, Philip ;
    Boateng, Godfred O
    2021-10-01 | PDF
    Objective: Drawing from the framework of social determinants of health, the objective of this paper was to investigate the cross-sectional association between transportation-related factors and self-perceived physical health among adults in the U.S. while adjusting for known demographic and socioeconomic-related factors. Methods: Data for this repo ...
  • Precision Statistics
    Precision Statistics
    Taylor, Ross ;
    Sebesta, Stephen
    2021-10-01 | PDF
    Understanding the precision of a test method is important to aid in evaluating the expected level of agreement in test results on like materials when performed either in a single lab or across multiple labs. Every test will be subject to some level of random errors; additionally, systematic factors or other factors impacting the test result could e ...
  • Energy Dissipated by Concrete Barriers in Vehicle Impact Scenarios by Combined Numerical and Analytical Approaches
    Energy Dissipated by Concrete Barriers in Vehicle Impact Scenarios by Combined Numerical and Analytical Approaches
    Klugh, Isaac ;
    Jones, Christopher
    2021-10-01 | PDF
    The American Association of State Highway and Transportation Officials (AASHTO) LRFD Bridge Design Specifications requires that bridge piers be capable of withstanding a lateral 600 kip static force. Older bridge piers throughout Kansas, specifically those constructed before the requirement for the 600 kip force was established, often have insuffic ...
  • Transportation Mobility Assessment and Recommendations for Smart City Planning
    Transportation Mobility Assessment and Recommendations for Smart City Planning
    Elefteriadou, Lily ;
    Classen, Sherrilene
    2021-10-01 | PDF
    The objective of this project was to develop and evaluate a Community-Based Participatory Research (CBPR) methodology for developing transportation mobility plans by assessing the needs of travelers in the community. The methodology was tested and refined at two Gainesville, Florida, neighborhoods: Duval Heights in the East Gainesville (EG) area an ...
  • Daily and Seasonal Movements of Brown Pelicans in the Baha Grande Wetland Complex Technical Report
    Daily and Seasonal Movements of Brown Pelicans in the Bahía Grande Wetland Complex: Technical Report
    Birt, Andrew ;
    Koczur, Lianne
    2021-10-01 | PDF
    This research project implemented a series of studies that investigated the daily and seasonal movements of brown pelicans in the Bahía Grande Wetland Complex (BGWC) of South Texas. The project was motivated by brown pelican mortality that occurs along a stretch of highway (State Highway 48 [SH 48]) that links Brownsville, Texas, to Port Isabel, Te ...
    Supporting Files
  • Using Computational Biology to Mitigate Path Overlap in Transit Assignment
    Using Computational Biology to Mitigate Path Overlap in Transit Assignment
    Becker, Timothy James ;
    Lownes, Nicholas
    2021-10-01 | PDF
    No Description
  • Air Travel Consumer Report October 2021
    Air Travel Consumer Report: October 2021
    United States. Department of Transportation. Office of Aviation Consumer Protection
    2021-10-01 | Air Travel Consumer Report Series | PDF
    The Air Travel Consumer Report is a monthly product of the Department of Transportation's Office of Aviation Consumer Protection. The report is designed to assist consumers with information on the quality of services provided by the airlines. Data Included in this Report Flight Delays: Flight Delays: August 2021; Mishandled Baggage / Wheelchairs an ...
  • Pavement Environmental Life Cycle Assessment Tool for Local Governments
    Pavement Environmental Life Cycle Assessment Tool for Local Governments
    Lea, Jon ;
    Harvey, John T
    2021-10-01 | PDF
    The processes in the pavement life cycle can be defined as: material extraction and production; construction; transport of materials and demolition; the use stage, where the pavement interacts with other systems; the materials, construction, and transport associated with maintenance and rehabilitation; and end-of-life. Local governments are increas ...
  • Understanding and Improving Heterogeneous Modern Recycled Asphalt Mixes
    Understanding and Improving Heterogeneous, Modern Recycled Asphalt Mixes
    Buttlar, William G. ;
    Abdelrahman, Magdy
    2021-10-01 | PDF
    A comprehensive research investigation was carried out to investigate the use of recycled materials in Super-pave asphalt mixtures in Missouri. The investigation involved sampling of aggregates, binders, plant-produced mixtures, and field cores followed by a rigorous lab testing program. Lab testing included an extensive binder extraction and recov ...
  • Life Cycle Integration of Building Information Modeling in Infrastructure Projects
    Life Cycle Integration of Building Information Modeling in Infrastructure Projects
    Guo, Xingzhou ;
    Tian, Chi
    2021-10-01 | PDF
    Building Information Modeling (BIM) can provide solutions to many challenges of asset management, such as missingdata, incompatible software, and an unclear business process. However, current implementation of BIM in infrastructure projects has only considers limited factors, such as technology application and digital information delivery, while is ...
  • Pavement Friction Management Program Demonstration
    Pavement Friction Management Program Demonstration
    Izeppi, Edgar de León ;
    McCarthy, Ross
    2021-10-01 | PDF
    A pavement friction management program (PFMP) should involve both equipment to collect friction and other relevant data as well as processes to analyze friction and crash data to determine possible friction enhancement treatments on sections that warrant it. This project built on previous experience with PFMPs to (1) propose an enhanced methodology ...
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