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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 4781 - 4800 of 36020 results
  • Perfecting Policy with Pilots New Mobility and AV Urban Delivery Pilot Project Assessment
    Perfecting Policy with Pilots: New Mobility and AV Urban Delivery Pilot Project Assessment
    Steckler, Becky ;
    Coia, Juliette
    2020-04-01 | PDF
    This study was designed to help public agencies understand what activities are most likely to help them achieve their pilot project goals. Researchers describe 10 recommended actions for all pilot projects, regardless of the mode. Researchers focused on pilot projects in the United States and Canada that involve testing of new mobility services and ...
  • Development and Implementation of a Moving Nondestructive Evaluation Platform for Bridge Deck Inspection
    Development and Implementation of a Moving Nondestructive Evaluation Platform for Bridge Deck Inspection
    Pashoutani, Sepehr ;
    Zhu, Jinying
    2020-04-01 | PDF
    Degradation in concrete bridge decks is typically manifested as rebar corrosion, concrete delamination, and surface cracks. Nondestructive evaluation and testing (NDE/NDT) technologies have been increasingly used in concrete bridge deck evaluation to identify, localize, and quantify deterioration in bridge decks. Each NDE method has its advantages ...
  • Best Practices on the Temporary Parking of Overflow Aircraft
    Best Practices on the Temporary Parking of Overflow Aircraft
    Le Bris, Gaël
    2020-04-01 | PDF
    Air traffic over the last few months has declined due to the COVID-19 pandemic. Overflow aircraft no longer being utilized to their full extent need to be parked. Many airports have facilities for parking overflow aircraft. The remote parking plans of airports should focus on safety, address the needs of various stakeholders, and be prepared throug ...
  • Refinement of the Inverted TBeam System for Virginia
    Refinement of the Inverted T-Beam System for Virginia
    Edwin, Ezra Bin Arif ;
    Gilbertson, Becky
    2020-04-01 | PDF
    The inverted T-beam system is well suited for short to medium spans, and can be built quickly and efficiently. The system was developed for Virginia, based on a similar system used in Minnesota, and has been used in two structures in the commonwealth. Previous research helped to develop the original details, but additional research was recommended ...
  • Consistent Trespasser Intent Determination Criteria Pilot Project
    Consistent Trespasser Intent Determination Criteria Pilot Project
    Chase, Stephanie G. ;
    Hiltunen, Danielle
    2020-04-01 | PDF
    This document describes a pilot project that evaluated the potential for developing standardized criteria that railroads can use to determine the probable intent (i.e., suicide or accident) of individuals involved in trespasser strikes on railroad right-of-way in the United States. These criteria are designed to help railroads better understand sui ...
  • Evaluation of Arterial Corridor Improvements and Traffic Management Plans in Florida Summary
    Evaluation of Arterial Corridor Improvements and Traffic Management Plans in Florida [Summary]
    Ponnaluri, Raj ;
    Vega, Pete
    2020-04-01 | PDF
    University of Florida researchers examined the effectiveness of ASCT in one of several pilot locations where ASCT is being implemented. The research team conducted a literature review and an overview of industry practice on Regional Traffic Operations Programs (RTOP). This task proved especially valuable in focusing the goals and further tasks of t ...
  • The Bituminous Book
    The Bituminous Book
    Minnesota Department of Transportation
    2020-04-01 | ZIP
    The purpose of this project was to develop a training program by capturing knowledge from MnDOT Subject Matter Experts in an area of knowledge that is essential to the functioning of MnDOT in performing its statutory required function of constructing and maintaining the road and bridge infrastructure for the State of Minnesota. The project uses the ...
    Supporting Files
  • Compost Blankets for Erosion Control and Vegetation Establishment
    Compost Blankets for Erosion Control and Vegetation Establishment
    Ahern, Jack ;
    Ramage, Christopher
    2020-04-01 | PDF
    This research examined how and whether blanket applications of 1–3 inches of compost over bare soil can improve slope stabilization and whether such applications can aid in the establishment of native grasses and forbs, particularly for sloping roadside conditions on Massachusetts Dept. of Transportation (MassDOT) jurisdictional roadways. The resea ...
  • Statistical Analysis of Safety Improvements and Integration Into Project Design Process
    Statistical Analysis of Safety Improvements and Integration Into Project Design Process
    Tarko, Andrew P. ;
    Romero, Mario
    2020-04-01 | PDF
    RoadHAT is a tool developed by the Center for Road Safety and implemented for the INDOT safety management practice to help identify both safety needs and relevant road improvements. This study has modified the tool to facilitate a quick and convenient comparison of various design alternatives in the preliminary design stage for scoping small and me ...
  • Rectangular Rumble Strip Safety Evaluation
    Rectangular Rumble Strip Safety Evaluation
    Storm, Richard ;
    Klump, Sam
    2020-04-01 | PDF
    This evaluation determined the change in crash frequency, type or severity associated with longitudinal rectangular rumble strips on rural two-lane undivided and rural four-lane divided Minnesota roadways constructed between 2012 and 2018. Crash Modification Factors (CMFs) were estimated using cross-sectional analysis to compare crash experience of ...
  • Experimental Determination of Braking Force Distribution in Steel Pile Bent Bridges
    Experimental Determination of Braking Force Distribution in Steel Pile Bent Bridges
    Marshall, Justin D. ;
    Anderson, J Brian
    2020-04-01 | PDF
    The research conducted in this project was undertaken to gain insight into the load path and intensity of the longitudinal braking force in highway bridge substructures, specifically shorter span, simply-supported bridges. To evaluate braking force magnitude and distribution, two types of field tests were conducted static tests and dynamic braking ...
  • Evaluation of PTC Braking Enforcement Algorithms for Passenger and Commuter Trains
    Evaluation of PTC Braking Enforcement Algorithms for Passenger and Commuter Trains
    Dasher, Jeremy ;
    Morrison, Kenny
    2020-04-01 | PDF
    Software algorithms used in Positive Train Control (PTC) systems designed to predict passenger train stopping distance and enforce a penalty brake application must be evaluated to verify their performance, which can be challenging due to variations in operational and equipment characteristics. The Federal Railroad Administration contracted Transpor ...
  • Development of Subgrade Stabilization and Slab Undersealing Solutions for PCC Pavements Restoration and Repairs
    Development of Subgrade Stabilization and Slab Undersealing Solutions for PCC Pavements Restoration and Repairs
    Behnood, Ali ;
    Olek, Jan
    2020-04-01 | PDF
    The loss of functionality and the development of distress in concrete pavements is often attributable to the poor subbase and subgrade conditions and/or loss of support due to the development of the voids underneath the slab. Subgrade soil stabilization can be used as an effective approach to restore the functionality of the subgrades in patching p ...
  • Hows That Diet Working Performance of Virginia Road Diets
    How’s That Diet Working: Performance of Virginia Road Diets
    Ohlms, Peter B. ;
    Dougald, Lance E.
    2020-04-01 | PDF
    In 2018, the Virginia Department of Transportation (VDOT) initiated this study to improve its understanding of past road diets in Virginia. Of interest were how road diets have been analyzed, how their performance has been quantified, how other states and localities have optimized their practices relating to road diets (e.g., public participation p ...
  • Investigation of Potential Design and Performance Criteria for Booster Seats Through Volunteer and Dynamic Testing
    Investigation of Potential Design and Performance Criteria for Booster Seats Through Volunteer and Dynamic Testing
    Klinich, Kathleen DeSantis ;
    Jones, Monica H.
    2020-04-01 | PDF
    The purpose of this research was to explore candidate booster performance metrics that have the potential to identify less effective booster systems, since current FMVSS No. 213 booster performance requirements can be met without a booster. A combination of volunteer testing of belt fit and posture along with dynamic sled tests of booster seats was ...
  • Examining the Geography of Opportunity through a New Public Transit Opportunity Index [supporting datasets]
    Painter, Gary ;
    Boarnet, Marlon G
    2020-03-31 | CSV
    The project introduces a new index of geographic opportunity that improves upon existing measures to analyze the spatial mismatch between job growth and populations in urban settings. Past measures of job accessibility have relied on measures of linear distance between populations and job, actual commute times for those working, or much simpler reg ...
    Dataset Supporting Files
  • Examining the Geography of Opportunity through a New Public Transit Opportunity Index
    Examining the Geography of Opportunity through a New Public Transit Opportunity Index
    Painter, Gary ;
    Boarnet, Marlon G
    2020-03-31 | PDF
    The project introduces a new index of geographic opportunity that improves upon existing measures to analyze the spatial mismatch between job growth and populations in urban settings. Past measures of job accessibility have relied on measures of linear distance between populations and job, actual commute times for those working, or much simpler reg ...
  • Socioeconomic Dimensions of Resilience to Seaport and Highway Transportation
    Socioeconomic Dimensions of Resilience to Seaport and Highway Transportation
    Wei, Dan ;
    Koc, Eyuphan
    2020-03-31 | PDF
    The economic impacts of a major disruption to seaports and their associated transportation infrastructure can be extensive and can affect people in a region unequally. To estimate the aggregate and distributional economic consequences of such disruptions, we developed an integrated transportation-socioeconomic analysis model to analyze the impacts ...
  • Exploring Social Connectivity and Transportation Needs of the Seniors Through a Mobile Smartphone Application
    Exploring Social Connectivity and Transportation Needs of the Seniors Through a Mobile Smartphone Application
    Cheu, Ruey Long ;
    Nunez-Mchiri, Guillermina Gina
    2020-03-31 | PDF
    Mobile smartphone applications may assist seniors in their mobility and connect them with the community. This project involves the development of a new version of the Urban Connector application to: (1) identify a metric of social connectivity from the mobility perspective from existing literature; (2) update the Urban Connector application to cons ...
  • Field Testing and Calibration of EDAR Method for Estimating Embedded Depth of Pile Foundation in North Carolina
    Field Testing and Calibration of EDAR Method for Estimating Embedded Depth of Pile Foundation in North Carolina
    Guddati, Murthy ;
    Rahman, Shamim
    2020-03-31 | PDF
    A new methodology to estimate the unknown pile length called Effective Dispersion Analysis of Reflections (EDAR) is developed. EDAR explicitly incorporates the dispersion properties of the wave generated on hammer impact to provide a length estimate. A software package is developed for seamless application of the EDAR methodology facilitating fata ...
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