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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 3501 - 3520 of 35958 results
  • Design and Construction of Infiltration Facilities
    Design and Construction of Infiltration Facilities
    Tecca, Nicholas P ;
    Gulliver, John S.
    2021-06-01 | PDF
    Infiltration stormwater control measures are an important structural practice to mitigate the impacts of urbanization on stormwater quality and quantity. Infiltration stormwater control measures help to mimic the natural processes of infiltration and evapotranspiration. Unfortunately, the failure rate of infiltration stormwater control measures has ...
  • Integration of Utility Engineering Coordination and Highway Design
    Integration of Utility Engineering, Coordination, and Highway Design
    Taylor, Tim ;
    Sturgill, Roy
    2021-06-01 | PDF
    State transportation agencies (STAs) strive to deliver highway projects on time and on budget. Utility relocations are frequently cited as a primary reason for delays. This report describes a new approach for enhancing the alignment of utility coordination and design. Researchers crafted this new approach based on the findings of a literature revie ...
  • Assessment of Bicycle Detection Confirmation and Countdown Devices
    Assessment of Bicycle Detection Confirmation and Countdown Devices
    Monsere, Christopher ;
    Kothuri, Sirisha
    2021-06-01 | PDF
    This research examined alternate designs for bicycle detection feedback confirmation devices. The research used quantitative data from a video review and responses from surveys to study how the information provided by the confirmation and feedback device affects the overall cycling experience. An online survey was conducted to determine comprehensi ...
  • Failing Malls Optimizing Opportunities for Housing
    Failing Malls: Optimizing Opportunities for Housing
    Blanco, Hilda J.
    ORCID ICON IMG
    2021-06-01 | PDF
    California, like most of the country, was facing a transformation in retail before the COVID-19 epidemic. Increasing Internet shopping have ushered the closing of anchor stores, such as Macy's, Sears, as well as the closure of many regional shopping malls, which have sizable footprints, ranging from 40-100+ acres. The epidemic has accelerated these ...
  • Modal Shifts in California from 20122017 Investigating Changes in Biking Walking and Transit from the 2012 CHTS and 2017 NHTS
    Modal Shifts in California from 2012-2017: Investigating Changes in Biking, Walking, and Transit from the 2012 CHTS and 2017 NHTS
    Pike, Susan ;
    Handy, Susan
    2021-06-01 | PDF
    This study evaluates changes in travel mode shares in California over the period from 2012, when the California Household Travel Survey (CHTS) was most recently completed, to 2017, the most recent implementation of National Household Travel Survey (NHTS). Initial review of the data suggests decreases in biking and walking over this time period. Thi ...
  • Local Policy for Better Micromobility
    Local Policy for Better Micromobility
    Fuller, Sam ;
    Fitch, Dillon T.
    2021-06-01 | PDF
    This report highlights key themes from a series of ten interviews with U.S. cities with micromobility programs in their jurisdictions (Atlanta, GA; Austin, TX; Chicago, IL; District of Columbia; Denver, CO; Los Angeles, CA; Oakland, CA; Portland, OR; San Diego, CA; Seattle, WA). The research aims to shed light on both the regulatory process and ide ...
  • Urban Freight Delivery and Loading Spaces
    Urban Freight Delivery and Loading Spaces
    McDonald, Noreen ;
    Steiner, Ruth
    2021-06-01 | PDF
    This research project presents an overview of the literature on urban freight and comparison of minimum requirements for freight loading spaces in the 20 largest cities in the United States, as well as the four most populous cities in North Carolina. The study provides insights on a topic that is little understood: how U.S. cities provide and manag ...
  • Iowa Pavement Analysis Techniques IPAT Tool
    Iowa Pavement Analysis Techniques (IPAT) Tool
    Citir, Nazik ;
    Kaya, Orhan
    2021-06-01 | PDF
    Recent federal legislation requires state highway agencies (SHAs) and local road agencies to utilize performance-based approaches in their pavement management decision-making processes. The use of a remaining service life (RSL) model would be one such performance-based approach that could facilitate the pavement management decision-making process. ...
  • Curve Advisory Speed and Curve Safety Assessment Practices Training Development and Support
    Curve Advisory Speed and Curve Safety Assessment Practices: Training Development and Support
    Pratt, Michael P. ;
    Geedipally, Srinivas R.
    2021-06-01 | PDF
    The Texas Department of Transportation’s (TxDOT’s) engineering study methods for setting curve advisory speeds were recently updated to extend the guidance to more types of rural highways (e.g., four-lane highways and freeways). Additionally, the software suite used to implement the Global Positioning System (GPS)-based engineering study method for ...
  • Innovative Materials and Advanced Technologies for a Sustainable Pavement Infrastructure
    Innovative Materials and Advanced Technologies for a Sustainable Pavement Infrastructure
    Le, Jia-Liang ;
    Marasteanu, Mihai
    2021-06-01 | PDF
    It is widely acknowledged that early detection of material damage and timely rehabilitation can lead to a significant reduction in the lifecycle cost of asphalt pavements. This research investigates the capabilities of damage detection and healing of graphite nanoplatelet (GNP)-taconite modified asphalt materials. The first part of the research is ...
  • Florida Index for Transportation A System of Systems Approach to Understanding the Changing Nature of Transportation
    Florida Index for Transportation: A System of Systems Approach to Understanding the Changing Nature of Transportation
    Choi, Juyeong ;
    Sun, Yanshuo
    2021-06-01 | PDF
    This study aimed to (i) identify and track external factors that are associated with all modes of transportation (i.e., auto, truck, transit, bicycle and pedestrian, aviation, rail, and seaport), (ii) understand the evolutionary and emergent nature of the Florida transportation system, and (iii) facilitate informed policy and decision making in tra ...
  • CPTBased Geotechnical Design Manual Volume 2 CPTBased Design of FoundationsMethods
    CPT-Based Geotechnical Design Manual, Volume 2: CPT-Based Design of Foundations—Methods
    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 ...
  • Evaluation of Methods for Left Turn Gap Analysis Using HighResolution Signal Data
    Evaluation of Methods for Left Turn Gap Analysis Using High-Resolution Signal Data
    Bassett, David ;
    Azra, Nuzhat
    2021-06-01 | PDF
    This project evaluates the most under-utilized but potentially the most useful ATSPM measure in decision making for left turn phasing at signalized intersections. Lack of data quality control or quality checks and a difficulty in using the currently presented measure on the website have been identified as shortcomings of the “left turn gap analysis ...
  • A Qualitative and Quantitative Assessment of Pavement Sections that have Remained in Poor Condition for 5Plus Years
    A Qualitative and Quantitative Assessment of Pavement Sections that have Remained in Poor Condition for 5-Plus Years
    Calhoon, Thomas ;
    Marasteanu, Mihai
    2021-06-01 | PDF
    The 2014 Transportation Asset Management Plan calls for developing a method to annually track, monitor, and identify road segments that have been in poor condition for more than 5 years and consistently consider them when programming. In Minnesota, pavements are considered in poor condition when the ride quality index (RQI) is less than or equal to ...
  • Investigating the Feasibility of Introducing Alternative Fuel Vehicles Into a Maintenance Fleet
    Investigating the Feasibility of Introducing Alternative Fuel Vehicles Into a Maintenance Fleet
    Rubaiat, Samia ;
    Esfahani, Hossein Nasr
    2021-06-01 | PDF
    This study investigated the feasibility of introducing AFVs into the Utah Department of Transportation (UDOT) fleet, and a proper framework was devised and tested with real-world data. A mixed-integer linear model was adapted from the literature and modified, allowing UDOT to determine which type of vehicle needed to be purchased and salvaged each ...
  • Safety Mobility and Cost Benefits of Closing One Direction of the Interstate in Rural Areas During Construction Work
    Safety, Mobility, and Cost Benefits of Closing One Direction of the Interstate in Rural Areas During Construction Work
    Padhey, Suyash ;
    Mwamba, Isaiah
    2021-06-01 | PDF
    With specific regard to interstates in the rural area, Indiana Department of Transportation (INDOT) has expressed a need for research that sheds light on this Maintenance of Traffic (MOT) issue so the agency [INDOT and the contractor] can make informed decisions regarding the crossover sections versus the closure in one direction with detour roads. ...
  • Development of GrassRoots Data Collection Methods in Rural Isolated and Tribal Communities
    Development of Grass-Roots Data Collection Methods in Rural, Isolated, and Tribal Communities
    Chang, Kevin ;
    Hodgson, Cody
    2021-06-01 | PDF
    While extensive procedures have been developed for the collection and dissemination of motor vehicle volumes and speeds, these same procedures cannot always be used to collect pedestrian data, given the comparably unpredictable behavior of pedestrians and their smaller physical size. There is significant value to developing lower cost, lower intrus ...
  • Aggregate Subgrade Improvements Using Quarry ByProducts A Field Investigation
    Aggregate Subgrade Improvements Using Quarry By-Products: A Field Investigation
    Qamhia, Issam I. A. ;
    Tutumluer, Erol
    2021-06-01 | PDF
    This report presents a case study for constructing aggregate subgrade improvement (ASI) layers using quarry by-product aggregates (QBA), a quarry mix of large primary crushed rocks (PCR) and sand-sized quarry fines. The construction took place at Larry Power Road in Bourbonnais Township in Kankakee County, Illinois, where the Illinois Department of ...
  • Postimplementation Evaluation of Integrated Corridor Management ICM in North Carolina
    Post-implementation Evaluation of Integrated Corridor Management (ICM) in North Carolina
    Chase, R. Thomas ;
    Samandar, Shoaib
    2021-06-01 | PDF
    Integrated Corridor Management (ICM) systems offer the potential to manage both travel demand and network demand in normal and abnormal conditions. Traditionally, ICM is typically applied in an urban setting where multiple transportation modes are readily available. NCDOT has applied ICM principles, but in more rural applications where less modal a ...
  • SCDOT Project Development Process Update and Best Practices
    SCDOT Project Development Process: Update and Best Practices
    Bausman, Dennis ;
    Haidary, Tanin
    2021-06-01 | PDF
    In the United States, federal, state, and local governments are responsible for addressing their residents' transportation infrastructure needs. Similar to most State Department of Transportation (State DOTs), the South Carolina Department of Transportation (SCDOT) is responsible for owning, operating, and maintaining a large transportation system ...
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