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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 3121 - 3140 of 35959 results
  • 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 ...
  • Exploring the Relationship Between Mandatory Helmet Use Regulations and Adult Cyclists Behavior in California Using Hybrid Machine Learning Models
    Exploring the Relationship Between Mandatory Helmet Use Regulations and Adult Cyclists’ Behavior in California Using Hybrid Machine Learning Models
    Kakhki, Fatemeh Davoudi ;
    Chierichetti, Maria
    2021-10-01 | PDF
    In 2019, the National Transportation Safety Board recommended the introduction of all-ages helmet law, to reduce fatalities involving cyclists. Even though the benefits of wearing helmets in protecting cyclists against trauma in cycling crashes has been documented, the use of helmets is still limited, and there is opposition against mandatory helme ...
  • 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 ...
  • Bridge Deck Cracking Evaluation
    Bridge Deck Cracking Evaluation
    Nelson, Todd ;
    Pham, Le
    2021-10-01 | PDF
    Transverse cracking of concrete bridge decks continues to be an issue for the Montana Department of Transportation (MDT) and is considered a common issue reported among many state departments of transportation (DOTs). In the last 25 years with the introduction of high performance concrete (HPC) in bridge decks to lower permeability and with the use ...
  • 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 ...
  • Driver Performance and Behavior in Adverse Weather Conditions Microsimulation and Variable Speed Limit Implementation of the SHRP2 Naturalistic Driving Study Results Phase 3
    Driver Performance and Behavior in Adverse Weather Conditions: Microsimulation and Variable Speed Limit Implementation of the SHRP2 Naturalistic Driving Study Results - Phase 3
    Ahmed, Mohamed ;
    Das, Anik
    2021-10-01 | PDF
    The negative impact of adverse weather conditions on traffic safety and operation is the primary focus of many studies. However, in-depth investigations of driver behavior and performance during adverse weather at a trajectory level using naturalistic driving data are limited. Over the years, researchers have utilized aggregate traffic and weather ...
  • 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 ...
  • Evaluation of Connected Vehicle Applications on Mahan Corridor Phase I
    Evaluation of Connected Vehicle Applications on Mahan Corridor, Phase I
    Moses, Ren
    2021-10-01 | PDF
    The communication between roadside units (RSUs) and onboard units (OBUs) using dedicated short range communication (DSRC) was implemented across 22 intersections on Mahan corridor in the City of Tallahassee with the aim of broadcasting signal phasing and timing (SPaT) and intersection map (MAP) information to OBU-equipped vehicles. The overall goal ...
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