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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 7781 - 7800 of 36114 results
  • Modeling Bicycle Crash Costs Using a GridCellBased Random Parameters Tobit Model
    Modeling Bicycle Crash Costs Using a Grid-Cell-Based Random Parameters Tobit Model
    Xie, Kun ;
    Ozbay, Kaan
    2017-08-01 | PDF
    Bicyclists are among the most vulnerable road users in the urban transportation systems. It is critical to investigate the contributing factors to bicycle-related crashes and to identify the hotspots for efficient allocation of treatment resources. A grid-cell-based modeling framework was used to explore the overall safety patterns of bicyclists in ...
  • Coverage vs Frequency Is Spatial Coverage or Temporal Frequency More Impactful on Transit Ridership
    Coverage vs Frequency : Is Spatial Coverage or Temporal Frequency More Impactful on Transit Ridership?
    Lyons, Torrey ;
    Ewing, Reid
    2017-08-01 | PDF
    Transit ridership has long been studied, and the findings are concisely elucidated byTaylor & Fink (2003) when they say “To sum, transit ridership is largely, though not completely, a product of factors outside the control of transit managers.” While studies repeatedly examine the effects on ridership of common variables like gasoline price and far ...
  • Crowdsourced social media monitoring system development
    Crowdsourced social media monitoring system development.
    Kumar, Amit ;
    Ross, Catherine L.
    2017-08-01 | PDF
    Crowdsourcing is a relatively new area of research, but it is already generating an enormous amount ofinterest among both researchers and practitioners, and is finding applications in multiple domains. It isparticularly useful for efficient traffic management and increasing public participation. Many state DOTsare already using crowdsourced technol ...
  • Study of the Impacts of Implements of Husbandry on Bridges Volume III Appendices
    Study of the Impacts of Implements of Husbandry on Bridges Volume III: Appendices
    Freeseman, Katelyn ;
    Phares, Brent
    2017-08-01 | PDF
    The objectives of this study were to develop guidance for engineers on how implements of husbandry loads are resisted by traditional bridges, with a specific focus on bridges commonly found on the secondary road system; provide recommendations for accurately analyzing bridges for these loading effects; and make suggestions for the rating and postin ...
  • How does transportation affordability vary among TODs TADs and other areas
    How does transportation affordability vary among TODs, TADs, and other areas?
    Scheer, Brenda ;
    Ewing, Reid
    2017-08-01 | PDF
    Transit-oriented development (TOD) has gained popularity worldwide as a sustainable form of urbanism; it concentrates development near a transit station so as to reduce auto-dependency and increase ridership. Existing travel behavior studies in the context of TOD, however, are limited in terms of small sample size, inconsistent TOD classification m ...
  • Evaluating Use of SubGrade Drains with PFC for Stormwater Drainage final report
    Evaluating Use of Sub-Grade Drains with PFC for Stormwater Drainage : final report.
    Huang, Jie ;
    Cleveland, Ted
    2017-08-01 | PDF
    The overarching objective of this project is to evaluate the effectiveness of incorporated subgrade drain (usually called “underdrain”) in the permeable friction course (PFC) pavement to facilitate drainage of stormwater within and on the pavement. The researchers from the University of Texas at San Antonio (UTSA) and Texas Tech University (TTU) ut ...
  • Exploring the Positive Utility of Travel and Mode Choice
    Exploring the Positive Utility of Travel and Mode Choice
    Singleton, Patrick A.
    ORCID ICON IMG
    2017-08-01 | PDF
    Why do people travel? Underlying most travel behavior research is the derived-demand paradigm of travel analysis, which assumes that travel demand is derived from the demand for spatially separated activities, traveling is a means to an end (reaching destinations), and travel time is a disutility to be minimized. In contrast, the "positive utility ...
  • Fatigue Crack Detection Using Unmanned Aerial Systems in UnderBridge Inspection
    Fatigue Crack Detection Using Unmanned Aerial Systems in Under-Bridge Inspection
    Dorafshan, Sattar ;
    Maguire, Marc
    2017-08-01 | PDF
    The applications of Unmanned Aerial Systems (UAS) for bridge inspection, with emphasis on under-bridge inspection and fatigue crack detection, were studied in this report. The potential benefits and challenges of using UAS for bridge inspection were identified through an extensive literature survey. The feasibility of using UAS for fatigue crack de ...
    Supporting Files
  • When do local governments regulate land use to serve regional goals Results of a survey tracking land use changes that support sustainable mobility a research report from the National Center for Sustainable Transportation
    When do local governments regulate land use to serve regional goals? Results of a survey tracking land use changes that support sustainable mobility : a research report from the National Center for Sustainable Transportation.
    Sciara, Gian-Claudia ;
    Strand, Sarah
    2017-08-01 | PDF
    An unprecedented effort to improve regional coordination and land use governance has beenunderway in California since 2008, when the state passed the Sustainable Communities andClimate Protection Act (Senate Bill 375). The law complements earlier state policy (AssemblyBill 32) to reduce statewide greenhouse gas emissions across an array of sectors. ...
  • WildlifeVehicle Collision Mitigation on State Route 260 Mogollon Rim to Show Low
    Wildlife-Vehicle Collision Mitigation on State Route 260 : Mogollon Rim to Show Low
    Gagnon, Jeffrey W. ;
    Loberger, Chad D.
    2017-08-01 | PDF
    Wildlife-vehicle collisions (WVC) account for 32 percent of all collisions along State Route (SR) 260 above the Mogollon Rim (Rim). To facilitate projected traffic volumes and improve design standards from Overgaard to U.S. Route 60, the Arizona Department of Transportation first initiated a Location/Design Concept Report (L/DCR). This research stu ...
  • Congestion reduction through efficient empty container movement a research report from the National Center for Sustainable Transportation
    Congestion reduction through efficient empty container movement : a research report from the National Center for Sustainable Transportation.
    Dessouky, Maged M. ;
    Carvajal, Santiago
    2017-08-01 | PDF
    In 2015, the Ports of Los Angeles and Long Beach moved 15.3 million twenty-foot EquivalentUnits (TEU). There is a significant body of work on moving loaded containers efficiently,however there has been little research on the movement of empty containers. Out of the 15.3million TEUs, about 30% or 4.3 million TEUs were empty containers.Empty containe ...
  • Fundamental evaluation of the interaction between RASRAP and virgin asphalt binders
    Fundamental evaluation of the interaction between RAS/RAP and virgin asphalt binders.
    Nazzal, Munir D. ;
    Kim, Sang Soo
    2017-08-01 | PDF
    A comprehensive laboratory testing program was conducted in this research project to examine the blending between reclaimed asphaltpavement (RAP)/recycled asphalt shingles (RAS) and virgin asphalt binders and to evaluate the factors that may affect fatigue and lowtemperaturecracking as well as moisture-induced damage in asphalt mixtures prepared us ...
  • TwoHorizontal Component Time Series at Twelve Sites in West and Central Tennessee and Improvement of GroundMotion Prediction Equations in the Central United States
    Two-Horizontal Component Time Series at Twelve Sites in West and Central Tennessee and Improvement of Ground-Motion Prediction Equations in the Central United States
    Pezeshk, Shahram ;
    Yahadami, Arash
    2017-08-01 | PDF
    This project includes three major parts. Part I. Two-Horizontal Component Time Histories at Twelve Sites in West and Central Tennessee Part II. Estimation of the Coda Wave Attenuation and Geometrical Spreading in the New Madrid Seismic Zone Part III. Ground Motion Prediction Equations for Eastern North America Using the Hybrid Empirical Method and ...
  • Issues in Urban Trip Generation
    Issues in Urban Trip Generation
    Currans, Kristina M.
    ORCID ICON IMG
    2017-08-01 | PDF
    In 1976, the Institute of Transportation Engineers (ITE) compiled their first Handbook of guidelines and methods for evaluating developmentlevel transportation impacts, specifically vehicular impacts (Institute of Transportation Engineers 1976). Decades later, these methods— essentially the same as when they were originally conceived—are used ubiqu ...
  • Innovative tools and techniques in identifying highway safety improvement projects technical report
    Innovative tools and techniques in identifying highway safety improvement projects : technical report.
    Tsapakis, Ioannis ;
    Dixon, Karen
    2017-08-01 | PDF
    The Highway Safety Improvement Program (HSIP) aims to achieve a reduction in the number and severity of fatalities and serious injury crashes on all public roads by implementing highway safety improvement projects. Although the structure and main components of the Texas Department of Transportation’s (TxDOT’s) HSIP comply with relevant requirements ...
  • Thermal integrity profiling for augered castinplace piles implementation plan
    Thermal integrity profiling for augered cast-in-place piles - implementation plan.
    Mullins, Gray ;
    Johnson, Kevin
    2017-08-01 | PDF
    This study was the second in a two-part research program focused on assessing the feasibility of using thermal integrity profiling (TIP) as a quality assurance tool for Augered Cast-In-Place (ACIP) piles. This was made possible by coordinating with the Deep Foundations Institute (DFI) ACIP pile project to demonstrate the strength of the piles in va ...
  • Advancing the State of Bridge WeighInMotion for the Connecticut Transportation Network
    Advancing the State of Bridge Weigh-In-Motion for the Connecticut Transportation Network
    Lobo-Agular, Sergio ;
    Christenson, Richard
    2017-08-01 | PDF
    Bridge Weigh-In-Motion (BWIM) uses the dynamic response of a bridge to determine gross vehicle weight, speed, and axle spacing of truck traffic to quantify the loads in a transportation network. The advantage of BWIM is that it does not require the installation of sensors in the pavement nor use any axle locators in the roadway. Research in BWIM me ...
  • Skewed steel bridges part ii crossframe and connection design to ensure brace effectiveness technical summary
    Skewed steel bridges, part ii : cross-frame and connection design to ensure brace effectiveness : technical summary.
    Zhou, James ;
    Bennett, Caroline
    2017-08-01 | PDF
    Skewed bridges in Kansas are often designed such that the cross-frames are carried parallel to the skew angle up to 40°, while many other states place cross-frames perpendicular to the girder for skew angles greater than 20°. Skewed-parallel cross-frames are longer and may require different connections than cross-frames oriented perpendicular to th ...
  • Snow and Ice Removal Route Optimization in Kentucky
    Snow and Ice Removal Route Optimization in Kentucky
    Blandford, Benjamin ;
    Lammers, Erin
    2017-08-01 | PDF
    Each year the Kentucky Transportation Cabinet (KYTC) spends $40-$80 million removing snow and ice from the state’s roadways. Snow and ice removal are accomplished through a system of snow and ice removal routes that are designed to account for location and the attributes of trucks, facilities, materials, and roadways. To identify strategies that wi ...
  • A10 Human Factors Considerations of UAS Procedures and Control Stations Tasks PC1 Through PC3 Pilot and Crew PC Subtask Recommended Requirements and Operational Procedures
    A10 – Human Factors Considerations of UAS Procedures and Control Stations: Tasks PC-1 Through PC-3, Pilot and Crew (PC) Subtask, Recommended Requirements and Operational Procedures
    Cerreta, Joseph ;
    Bruner, Timothy
    2017-08-01 | PDF
    The Alliance for System Safety of UAS through Research Excellence (ASSURE) conducted research focused on minimum pilot procedures and operational practices used by unmanned aircraft systems (UAS) operators today for the purpose of developing recommendations. This research recommends four pilot and 46 operational minimum procedures to operate a civi ...
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