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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 36011 results
  • Investigating the Resilience of Accessibility to Emergency and Lifesaving Facilities under Natural Hazards [supporting dataset]
    Wang, Chih-Hao ;
    Chen, Na
    2021-06-01 | ZIP
    Studying accessibility, including the resilience of city transportation networks, is critical to understand how these networks influence individuals’ mobility and lives. This study developed an analytical research framework to examine the resilience of accessibility to emergency and lifesaving facilities under the threats of natural hazards such as ...
    Dataset Supporting Files
  • Reclaimed Stabilized Base Stabilizing Agent Selection Design Fact Sheet
    Reclaimed Stabilized Base – Stabilizing Agent Selection & Design [Fact Sheet]
    Ghazanfari, Ehsan ;
    Lens, John E.
    2021-06-01 | PDF
    Reclaimed stabilized base (RSB) is a common technique utilized to rehabilitate roadways. RSB involves reclaiming the base material and adding a stabilizing agent to increase the strength and durability of the base/subbase structure. This technique involves pulverizing some of the existing pavement along with a portion of the underlying base materia ...
  • Analysis of Truck Weight Limit Regulations
    Analysis of Truck Weight Limit Regulations
    Marks, P Gayle ;
    Wilcoxson, Jon
    2021-06-01 | PDF
    In the United States vehicle weight limits are set by laws and regulations enacted at the state and federal levels. On interstates the maximum allowable gross vehicle weight is 80,000 lbs. States use different rules for permitting over-dimensional and overweight (OD/OW) vehicles, and most have carve outs that exempt specific commodities from standa ...
  • Estimation and Simulation of Daily Activity Patterns for Individuals Using Wheelchairs
    Estimation and Simulation of Daily Activity Patterns for Individuals Using Wheelchairs
    Macfarlane, Gregory S ;
    Lant, Nathan J
    2021-06-01 | PDF
    Individuals who use wheelchairs or who have other mobility challenges often are unable to access modern mobility systems – including application-based ride hailing and on-demand microtransit. Even designing a system targeted at these users is challenging, given the limited prior analysis of their travel behavior and activity patterns. Simulation to ...
  • Time and Cost Benefits for Traffic Through Snowplow Operations
    Time and Cost Benefits for Traffic Through Snowplow Operations
    Moser, Andrea ;
    Wells, Kevin
    2021-06-01 | PDF
    The Utah Department of Transportation (UDOT) has difficulty conveying to the public all of the user benefits that result from UDOT’s snowplow operations. This project is focused on communicating the importance to travelers of snowplow operations in terms of travel time saved and travel time improved vs. not plowing. This information will be added t ...
  • CPTBased Geotechnical Design Manual Volume 1 CPT InterpretationEstimation of Soil Properties
    CPT-Based Geotechnical Design Manual, Volume 1: CPT Interpretation—Estimation of Soil Properties
    Niazi, Fawad
    2021-06-01 | PDF
    This manual provides guidance on how to use the cone penetration test (CPT) for site investigation and foundation design. The manual has been organized into three volumes. Volume 1 covers the execution of CPT-based site investigations and presents a comprehensive literature review of CPT-based soil behavior type (SBT) charts and estimation of soil ...
  • Developing Performance Specifications for HighPerformance Concrete Technical Report
    Developing Performance Specifications for High-Performance Concrete: Technical Report
    Mukhopadhyay, Anol ;
    Saraswatula, Pravin
    2021-06-01 | PDF
    In the past, achieving high strength was considered by the Texas Department of Transportation (TxDOT) as the main design criteria for formulating high-performance concrete (HPC). TxDOT considers mix design options 1–5 in Item 421 as HPC, and these options were developed for alkali silica reaction (ASR) mitigation and not for other durability aspect ...
  • Development and Seismic Evaluation of CastinPlace Emulating ABC Pocket Connections and SMA Reinforced TwoWay Hinges
    Development and Seismic Evaluation of Cast-in-Place Emulating ABC Pocket Connections and SMA Reinforced Two-Way Hinges
    Camarena, Christian ;
    Saiidi, M Saiid
    2021-06-01 | PDF
    Accelerated bridge construction (ABC) may be preferable to conventional cast-in-place (CIP) construction because it can significantly expedite project delivery. The design of precast member connections is critical as the connections must maintain structural integrity and provide for ductile behavior under strong earthquakes. Pocket/socket connectio ...
  • Understanding and Efficiently Managing RightToTake Challenges in Kentucky
    Understanding and Efficiently Managing Right-To-Take Challenges in Kentucky
    Clay-Young, Pam ;
    Waddle, Steven
    2021-06-01 | PDF
    Right-to-take challenges delay a condemnor’s project delivery schedule. Issuing efficient and effective responses to these challenges is critical for successful project completion. This report extrapolates information from Kentucky case law to assess trends in decisions and strategies for preventing and litigating these challenges. A condemnor’s ri ...
  • Evaluation of the Virginia Department of Transportations Current Practices for Tracking Storm Drain Cleaning Operations To Support Pollutant Removal Crediting
    Evaluation of the Virginia Department of Transportation’s Current Practices for Tracking Storm Drain Cleaning Operations To Support Pollutant Removal Crediting
    Lloyd, Lewis N.
    2021-06-01 | PDF
    The Virginia Department of Transportation (VDOT) implements a number of different best management practices to meet pollutant load reductions associated with the Chesapeake Bay Total Maximum Daily Load (TMDL) Program. Although commonly implemented best management practices include structural practices such as bioretention filters and extended deten ...
  • Continued Monitoring of Stormwater Effluents From Filter Media in Two Bioslope Sites
    Continued Monitoring of Stormwater Effluents From Filter Media in Two Bioslope Sites
    Cai, Meijun ;
    Patelke, Marsha
    2021-06-01 | PDF
    Over the last thirty years, the Minnesota Department of Transportation (MnDOT) has implemented biofilters along roadways as a stormwater control measure. The state and national regulations require that the biofilters must be able to infiltrate and treat the first inch of rainfall onsite. However, the performance of the biofilters after installation ...
  • Performance Testing of Hot Mix Asphalt Modified With Recycled Waste Plastic
    Performance Testing of Hot Mix Asphalt Modified With Recycled Waste Plastic
    Saadeh, Shadi ;
    Katawal, Pritam
    2021-06-01 | PDF
    Plastic pollution has become one of the major concerns in the world. Plastic waste is not biodegradable, which makes it difficult to manage waste plastic pollution. Recycling and reusing waste plastic is an effective way to manage plastic pollution. Because of the huge quantity of waste plastic released into the world, industries requiring a large ...
  • Well Control Equipment Systems Safety 2019 Annual Report
    Well Control Equipment Systems Safety: 2019 Annual Report
    Hu, Patricia S. ;
    Schmidt, Rolf R.
    2021-06-01 | PDF
    The Well Control Equipment Systems Safety – 2019 Annual Report, produced by the Bureau of Transportation Statistics, summarizes well control equipment (WCE) failure events that occurred during well operations in the Gulf of Mexico (GOM) Outer Continental Shelf (OCS) during the calendar year. This report is based on information collected through Saf ...
  • Meeting the 21st Century SurveyingGeomatics Education Needs of GDOT and Georgia
    Meeting the 21st Century Surveying–Geomatics Education Needs of GDOT and Georgia
    Scott, David ;
    Maldonado, Gustavo
    2021-06-01 | PDF
    This research project establishes ways to serve the surveying–geomatics (S-G) education needs of place-bound students, such as Georgia Department of Transportation (GDOT) personnel and others. It addresses the need for personnel with a 21st century education (knowledge and skills) in surveying–geomatics. Many factors, including lack of traditional ...
  • Michigan Transportation Construction Price Index Final Report I
    Michigan Transportation Construction Price Index [Final Report I]
    Liu, Hexu ;
    Kwigizile, Valerian
    2021-06-01 | PDF
    A highway construction cost index (HCCI) measures the price changes over time in the highway construction industry. It allows Departments of Transportation (DOTs) to monitor highway construction market conditions so that they can more accurately project long-term funding needs. Michigan has not yet established a methodology for HCCI calculation or ...
  • Development and Demonstration of an InVehicle Lane Departure Warning System Using Standard GPS Technology
    Development and Demonstration of an In-Vehicle Lane Departure Warning System Using Standard GPS Technology
    Chowdhury, Shahnewaz ;
    Hossain, Md Touhid
    2021-06-01 | PDF
    A lane departure warning system (LDWS) has significant potential to reduce crashes on roads. Most existing commercial LDWSs use some kind of image processing techniques with or without Global Positioning System (GPS) technology and/or high-resolution digital maps to detect unintentional lane departures. However, the performance of such systems is c ...
  • Development of a NetworkLevel Evaluation Tool for Managing Its Infrastructure
    Development of a Network-Level Evaluation Tool for Managing Its Infrastructure
    Van Hecke, Samuel ;
    Gallagher, Mark R.
    2021-06-01 | PDF
    The research team developed a methodology and implementation tool for the evaluation of Intelligent Transportation System (ITS) projects. The tool enables users to define packages of ITS improvements and provides a planning-level benefit/cost analysis output based on roadway data (such as delay and safety).
  • Improving the LongTerm Condition of Pavements in Massachusetts and Determining Return on Investment Implementing the AASHTO MechanisticEmpirical Pavement Design Guide Phase I
    Improving the Long-Term Condition of Pavements in Massachusetts and Determining Return on Investment: Implementing the AASHTO Mechanistic-Empirical Pavement Design Guide Phase I
    Mogawer, Walaa S. ;
    Austerman, Alexander J.
    2021-06-01 | PDF
    The goal of this study was to conduct a thorough literature review to determine the overall state-of-practice with regards to AASHTO Mechanistic Empirical Design Guide (MEPDG) implementation with focus on local verification and calibration. The literature review presented outlines the steps taken by other state agencies to perform local calibration ...
  • Pavement Thickness Evaluation Using 3D Ground Penetrating Radar
    Pavement Thickness Evaluation Using 3D Ground Penetrating Radar
    Khazanovich, Lev
    2021-06-01 | PDF
    The objective of this research was to develop a procedure for nondestructive assessment of pavement thickness using 3D ground penetrating radar (3D GPR). The software developed in this study can analyze the data sets collected with either 27- or 121- transmitting and receiving pair configurations. It uses two approaches to determine asphalt thickne ...
  • CPTBased Geotechnical Design Manual Volume 3 CPTBased Design of FoundationsExample Problems
    CPT-Based Geotechnical Design Manual, Volume 3: CPT-Based Design of Foundations—Example Problems
    Sakleshpur, Venkata Abhishek ;
    Prezzi, Monica
    2021-06-01 | PDF
    This manual provides guidance on how to use the cone penetration test (CPT) for site investigation and foundation design. The manual has been organized into three volumes. Volume 1 covers the execution of CPT-based site investigations and presents a comprehensive literature review of CPT-based soil behavior type (SBT) charts and estimation of soil ...
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