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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 6561 - 6580 of 36958 results
  • Simplified and Standardized Seismic Design and Detailing for Alabama Bridges
    Simplified and Standardized Seismic Design and Detailing for Alabama Bridges
    Marshall, Justin D. ;
    Broderick, Joseph
    2019-01-01 | PDF
    Simplification and standardization of the seismic design processes for typical Alabama bridges has been investigated and developed in this research. A number of design tools have been developed to reduce the analysis complexity and time demands on bridge designers. These tools can be used to simplify and standardize the seismic design process due t ...
  • WisDOT Research Program 2019 Annual Report
    WisDOT Research Program: 2019 Annual Report
    Wisconsin. Department of Transportation
    2019-01-01 | PDF
    This is a report of research and technology transfer activities carried out by the Wisconsin Department of Transportation through the Part 2 research portion of the State Planning and Research Program of the Federal Highway Administration, U.S. Department of Transportation. The report describes activities during Federal Fiscal Year 2019, covering O ...
  • Assessment of Construction Points for Grade Control and Reference in 3D
    Assessment of Construction Points for Grade Control and Reference in 3D
    Cho, Yong Kwon ;
    Park, Jisoo
    2019-01-01 | PDF
    The objective of this research is to investigate the causes of inaccuracies of grade elevations from current practices and identify best practices for grade control and referencing on transportation infrastructure construction projects in Georgia. A nationwide questionnaire survey was conducted with contractors, engineers, surveyors, and owners, an ...
  • Florida Access Management Benchmarking Study Summary
    Florida Access Management Benchmarking Study [Summary]
    Williams, Kristine M
    2019-01-01 | PDF
    University of South Florida researchers conducted a study to compare Florida’s access management programs to those of comparable states and with current best practices for context-sensitive access management.
  • Driver Compliance at Enhanced Pedestrian Crossings in Utah
    Driver Compliance at Enhanced Pedestrian Crossings in Utah
    Fayyaz, Kiavash ;
    Schultz, Grant G.
    2019-01-01 | PDF
    Since its creation, the Utah Department of Transportation (UDOT) has made safety its number one priority. Over a decade ago, UDOT began implementing technological enhancements to reduce the fatality rate of pedestrians involved in crashes. However, there is a need to evaluate the effectiveness of these enhancements. This study evaluates the safety ...
  • Successes in Stewardship The EcoLogical Approach Helps Accelerate Project Delivery and Improve Environmental Outcomes
    Successes in Stewardship - The Eco-Logical Approach Helps Accelerate Project Delivery and Improve Environmental Outcomes
    United States. Federal Highway Administration
    2019-01-01 | PDF
    Successes in Stewardship is a Federal Highway Administration (FHWA) bimonthly newsletter highlighting current best practices in stewardship and environmental review from around the country.
  • Updated Guidebook Using Public Transportation to Facilitate Last Mile Package Delivery
    Updated Guidebook: Using Public Transportation to Facilitate Last Mile Package Delivery
    Elgart, Zachary ;
    Miller, Kristi
    2019-01-01 | PDF
    This guidebook provides public transit agencies in rural Texas communities with the information necessary to implement a package delivery service in coordination with a private package delivery partner. Chapter 1 introduces the guidebook, describes its purpose, describes the opportunity to provide package delivery via rural transit, and documents f ...
  • NearRoadway Air Pollution Evaluation of Fine Particulate Matter PM25 and Ultrafine Particulate Matter PM01 in Interior Alaska
    Near-Roadway Air Pollution: Evaluation of Fine Particulate Matter (PM2.5) and Ultrafine Particulate Matter (PM0.1) in Interior Alaska
    Aggarwal, Srijan ;
    Kadir, Abdul
    2019-01-01 | PDF
    This report presents a study of fine (PM2.5) and ultrafine (PM0.1) particles in the Fairbanks North Star Borough (FNSB) in Interior Alaska, with specific emphasis on the relationship of ultrafine particles (UFPs) to vehicular traffic. Chapter 1 provides a summary of published literature on particulates in air from vehicular emissions. Chapter 2 pro ...
  • Evaluation of the LongTerm Performance and Benefit of Using an Enhanced MicroMilling Resurfacing Method GDOT 1320
    Evaluation of the Long-Term Performance and Benefit of Using an Enhanced Micro-Milling Resurfacing Method [GDOT 13-20]
    Tsai, James (Yichang) ;
    Wang, Zhaohua
    2019-01-01 | PDF
    The Georgia Department of Transportation (GDOT) has applied the environmentally friendly and cost-effective pavement preservation method, micro-milling and thin overlay, to Georgia’s interstate highways since 2007. The objectives of this project were to critically assess the long-term performance of micro-milling and thin overlay and to quantitativ ...
  • Assessing the SocioEconomic Implications Related to the Emergence of Shared Autonomous Vehicles
    Assessing the Socio-Economic Implications Related to the Emergence of Shared Autonomous Vehicles
    Losada-Rojas, Lisa Lorena ;
    Gkartzonikas, Christos
    2019-01-01 | PDF
    The emergence of shared autonomous vehicles (SAVs) is expected to alter transportation costs and patterns, thus affecting accessibility and mobility (i.e., transportation disadvantage), and could have direct and indirect socio-economic implications, such as access to opportunities and flexible and affordable mobility. This presentation will describ ...
  • Extended Life Concrete Bridge Decks Utilizing Improved Internal Curing To Reduce Cracking
    Extended Life Concrete Bridge Decks Utilizing Improved Internal Curing To Reduce Cracking
    Wang, Xuhao ;
    Taylor, Peter
    2019-01-01 | PDF
    With the ongoing concern about premature cracking of concrete bridge decks that reduces the service life of bridges and results in increased maintenance and replacement costs, this work aimed at assessing the benefits of using lightweight fine aggregate (LWFA) in concrete mixtures to assist the Ohio Department of Transportation (ODOT) in preparing ...
  • Florida Aviation Activity Forecast Methodologies and Tools Development Summary
    Florida Aviation Activity Forecast Methodologies and Tools Development [Summary]
    Zhang, Yu
    ORCID ICON IMG
    2019-01-01 | PDF
    To ensure the efficient operation and healthy development of the state’s airports, the Florida Department of Transportation (FDOT) developed the Aviation Grant Program to provide financial assistance to Florida’s airports. To guide airport planning and financial decisions, it is essential to have accurate forecasts of airport activity, which provid ...
  • Demonstration Project for Implementation of Performance Enhanced Mixtures PEM
    Demonstration Project for Implementation of Performance Enhanced Mixtures (PEM)
    Hanson, Todd ;
    McDaniel, Lisa
    2019-01-01 | PDF
    Concrete has traditionally been accepted by testing air, slump, and strength. However, these test methods usually do not have a direct relationship with long term durability. A number of new test methods have been developed that give a better prediction of long-term performance. On a recent paving project on US 20 in Woodbury County, Iowa, several ...
  • Improving the Accuracy and Applicability of Kansas Traffic Data Technical Summary
    Improving the Accuracy and Applicability of Kansas Traffic Data [Technical Summary]
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2019-01-01 | PDF
    This research investigated the accuracy and reliability of KC Scout traffic sensors in the Kansas City metropolitan area. The locations and sensors under investigation are of particular importance to the Kansas Department of Transportation (KDOT) because they regularly report accurate traffic counts to the Federal Highway Administration (FHWA).
  • Strategic and Tactical Guidance for the Connected and Autonomous Vehicle Future
    Strategic and Tactical Guidance for the Connected and Autonomous Vehicle Future
    Ukkusuri, Satish V. ;
    Sagir, Fasil
    2019-01-01 | PDF
    Autonomous vehicle (AV) and connected vehicle (CV) technologies are rapidly maturing and the timeline for their wider deployment is currently uncertain. These technologies are expected to have a number of significant societal benefits: traffic safety, improved mobility, improved road efficiency, reduced cost of congestion, reduced energy use, and r ...
  • Concrete Grinding Residue Its Effect on Roadside Vegetation and Soil Properties
    Concrete Grinding Residue: Its Effect on Roadside Vegetation and Soil Properties
    Ceylan, Halil ;
    Zhang, Yang
    2019-01-01 | PDF
    Concrete grinding residue (CGR) is a slurry waste consisting of water and concrete fines generated from diamond grinding operations that is used to smooth a concrete pavement surface. During this process, CGRs are mostly disposed along the roadside, which can influence soils and plant communities along the roadways. To understand the effects of CGR ...
  • Smart Mobility for Seniors Challenges and Solutions in El Paso TX and New York NY
    Smart Mobility for Seniors: Challenges and Solutions in El Paso, TX, and New York, NY
    Vechione, Matthew ;
    Marrufo, Corina
    2019-01-01 | PDF
    Many older adults or seniors face mobility issues as they age, for example, switching from driving to using carpool, taxi, or staying on fixed routes. Seniors require responsive transportation services to attend activities. Unfortunately, there are limited tools to assist seniors to find the most appropriate transportation options given their mobil ...
  • Using the New SHRP2 Naturalistic Driving Study Safety Databases to Examine Safety Concerns for Older Drivers
    Using the New SHRP2 Naturalistic Driving Study Safety Databases to Examine Safety Concerns for Older Drivers
    Knodler, Michael A. ;
    Samuel, Siby
    2019-01-01 | PDF
    Older drivers, age 65 and over, in the New England region have higher rates of crashes and of crash-related fatalities than middle-age drivers, and are especially over-represented in crashes occurring during left turns at signalized intersections. This study sought to learn more about the factors behind this trend, utilizing information from the SH ...
  • Analyzing Transportation Big Data with GIS Detecting Overspeeding Vehicles from Traffic GPS Data
    Analyzing Transportation Big Data with GIS: Detecting Over-speeding Vehicles from Traffic GPS Data
    Chen, Yulu ;
    Tsou, Ming-Hsiang
    2019-01-01 | PDF
    With the popularity of automobiles and increasing volume of vehicles, the traffic accident rates in U.S. cities are increasing year by year. The aggressive driving behaviors can be considered as one of the main reasons to lead to serious traffic crashes according to AAA (American Automobile Association) Foundation for Traffic Safety. Over-speeding ...
  • Assessment of Bridges Subjected to Vehicular Collision Summary
    Assessment of Bridges Subjected to Vehicular Collision [Summary]
    Thrall, Ashley P
    2019-01-01 | PDF
    Vehicles often collide with bridges. However, there are no available guidelines for bridge inspectors to assess damage and make repair decisions. This project addresses this gap by investigating the behavior of steel girder bridges subjected to vehicular collision through (1) performing non-destructive field testing, (2) developing validated numeri ...
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