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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 7321 - 7340 of 36114 results
  • WeighinMotion Sensor and Controller Operation and Performance Comparison
    Weigh-in-Motion Sensor and Controller Operation and Performance Comparison
    Gupta, Diwakar ;
    Tang, Xiaxu
    2018-01-01 | PDF
    This research project utilized statistical inference and comparison techniques to compare the performance of different Weigh-in-Motion (WIM) sensors. First, we analyzed test-vehicle data to perform an accuracy check of the results reported by the sensor-vendor Intercomp. The results reported by Intercomp mostly matched with our own analysis, but th ...
  • TxDOT 0-6863: Pretensioned Concrete Bent Caps Phase 2 Experimental Dataset
    McKee, Codi D. ;
    Lee, Ju Dong
    2018-01-01 | ZIP
    This dataset contains metadata and data collected during TxDOT Project 0-6863 on development of standards for precast, pretensioned concrete bent caps. Phase 2 tests are contained in this dataset. The Phase 2 setup consisted of a longer overhang and interior span than Phase 1, allowing for application of larger moment demands. Phase 2 consisted of ...
    Dataset Supporting Files
  • Statistical Programs of the United States Government Fiscal Year 2018
    Statistical Programs of the United States Government: Fiscal Year 2018
    United States. Office of Management and Budget
    2018-01-01 | PDF
    Statistical Programs of the United States Government: Fiscal Year 2018 outlines the funding proposed for Federal statistical activities in the President's Budget. This report, along with the chapter "Strengthening Federal Statistics" in the Analytical Perspectives volume of the President's Budget, fulfills the responsibility of the Office of Manage ...
  • Evaluation of Project Processes in Relation to Transportation System Management and Operations TSMO
    Evaluation of Project Processes in Relation to Transportation System Management and Operations (TSM&O)
    Sando, T. ;
    Alluri, P.
    2018-01-01 | PDF
    This study was conducted to explore the current state-of-the-practice of Transportation Systems Management and Operations (TSM&O) in the Florida Department of Transportation (FDOT) and determine what would be required to mainstream TSM&O throughout the project development process. A comprehensive review of existing FDOT guidelines, two statewide su ...
    Supporting Files
  • Prediction of Hydroplaning Risk of Truck on Roadways
    Prediction of Hydroplaning Risk of Truck on Roadways
    Wang, Hao ;
    Ding, Y.
    2018-01-01 | PDF
    The risk of hydroplaning is one of major safety concerns at rainy weather condition for both travel public and highway agencies. Most previous studies have focused on analysis of hydroplaning for passenger car tires while giving limited importance to truck tires. This study aimed to investigate hydroplaning risk of truck tires and compare hydroplan ...
  • Montana Department of Transportation Research Peer Exchange Implementation Performance Measures and the Value of Research
    Montana Department of Transportation Research Peer Exchange : Implementation, Performance Measures, and the Value of Research
    Seeber, Kirsten ;
    Hirt, Brian
    2018-01-01 | PDF
    The Montana Department of Transportation (MDT) Research Program hosted a peer exchange in Helena, Montana, from September 12-14, 2017. The objective for the peer exchange was to explore best practices on implementation, performance measures, and the value of research. MDT compiled and shared questions participants submitted prior to the peer exchan ...
  • StormInduced Slope Failure Susceptibility Mapping
    Storm-Induced Slope Failure Susceptibility Mapping
    Mohseni, Omid ;
    Anderson, Cory
    2018-01-01 | PDF
    A pilot study was conducted to characterize and map the areas susceptible to slope failure using state-wide available data. The objective was to determine whether it would be possible to provide slope-failure susceptibility mapping that could be used by local road and highway officials to understand better where slope failure may occur. This would ...
  • Transportation Planning and Research ANNUAL WORK PROGRAM AND COST ESTIMATE 2018
    Transportation Planning and Research : ANNUAL WORK PROGRAM AND COST ESTIMATE, 2018
    Idaho. Transportation Department
    2018-01-01 | PDF
    This document is the section-by-section ANNUAL WORK PROGRAM AND COST ESTIMATE for the agency whose MISSION is to provide excellence in transportation planning through an inclusive and comprehensive planning process that provides products, services, and information to guide transportation decisions that balance safety, mobility, and economic opportu ...
    Supporting Files
  • Characterization and Modeling of Recycled Pavement Sections
    Characterization and Modeling of Recycled Pavement Sections
    Xue, Wenjing ;
    Flintsch, Gerardo W.
    2017-12-31 | PDF
    Because of its documented cost and environmental benefits, cold central plant recycling (CCPR) has attracted the interest of local and state departments of transportation. In 2015 two test pavement sections with CCPR as base layers were constructed at the Accelerated Pavement Testing facility located at the Virginia Tech Transportation Institute. T ...
  • National Jet Fuels Combustion Program Area 3 Advanced Combustion Tests
    National Jet Fuels Combustion Program – Area #3 : Advanced Combustion Tests
    Lee, Tonghun
    2017-12-31 | PDF
    The goal of this study is to develop, conduct, and analyze advanced laser and optical measurements in the experimental combustors developed under ASCENT National Fuel Combustion Program to measure sensitivity to fuel properties. We conducted advanced spatially resolved high-speed planar imaging, high-speed Schlieren imaging, high-speed OH* chemilum ...
  • Seismic Vulnerability and PostEvent Actions Project Summary
    Seismic Vulnerability and Post-Event Actions [Project Summary]
    Clayton, Patricia ;
    Khosravikia, Farid
    2017-12-31 | PDF
    Historically, seismic hazards have not been a major concern in the design and maintenance of bridges in the State of Texas due to the infrequency and low magnitudes of seismic events experienced in the state. A recent increase in the number earthquakes across Texas and the larger magnitude earthquakes that have occurred recently in nearby states ha ...
  • Improving Federal Transit Administration Vehicle Procurement in Mississippi
    Improving Federal Transit Administration Vehicle Procurement in Mississippi
    Sullivan, Mike ;
    Houghton, John
    2017-12-31 | PDF
    Mississippi Department of Transportation (MDOT) seeks to thoroughly assess its transit vehicle procurement processes, compare best practices from other states, and identify recommendations for improved efficiency. The research conducted for the study includes a review of the current existing literature on procurement processes, existing MDOT method ...
  • Rolling Density Meter to Ensure Long Term Performance of Flexible Pavements Project Summary
    Rolling Density Meter to Ensure Long Term Performance of Flexible Pavements [Project Summary]
    Sebesta, Stephen ;
    Wilson, Bryan
    2017-12-31 | PDF
    Currently, the Texas Department of Transportation (TxDOT) measures the roadway compaction of asphalt mixtures with field coring where one pair of cores is collected per sublot. This low level of testing coverage results in high producer and consumer risks, posing good chances for missing localized problem areas that govern pavement life.
  • Evaluation of Benefit Weight Factors and Decision Trees for Automated Distress Data Models
    Evaluation of Benefit Weight Factors and Decision Trees for Automated Distress Data Models
    Chen, Don ;
    Hildreth, John C
    2017-12-31 | PDF
    A Pavement Management System (PMS) becomes an effective decision-making tool when its performance models are accurate, and its trigger points (values) and benefit weight factors are precisely calibrated. Since 2011, NCDOT began collecting pavement distress data using automated methods. These data were make available to this study. New distress and ...
  • Enhancing Nonmotorized Mobility within Construction Zones
    Enhancing Non-motorized Mobility within Construction Zones
    Mazumder, Abul ;
    Sahi, Wjdan
    2017-12-31 | PDF
    Acquisition of lanes and sidewalks for construction activities increases congestion and delays and compromises safety. Further, work zones impair access to local businesses, bus stops, nearby facilities, etc., while hindering mobility of pedestrians, cyclists, and emergency responders. The emphasis on nonmotorized mobility varies significantly when ...
  • FreezeThaw Durability and LongTerm Performance Evaluation of Shotcrete in Cold Regions
    Freeze-Thaw Durability and Long-Term Performance Evaluation of Shotcrete in Cold Regions
    Qiao, Pizhong ;
    Zhou, Zhidong
    2017-12-31 | PDF
    This study’s aim was to evaluate the freeze-thaw durability of shotcrete in cold regions and predict its long-term performance. One benchmark mix design from the WSDOT was chosen to prepare samples for performance evaluation. Shotcrete specimens were conditioned in accordance with ASTM C666. The long-term freeze-thaw performance after certain cycle ...
  • Determining the Effects of CrossAnisotropy on Pavement Response and Performance
    Determining the Effects of Cross-Anisotropy on Pavement Response and Performance
    Tarefder, Rafiqul A. ;
    Ahmed, Mesbah
    2017-12-31 | PDF
    This study is performed to investigate the effect of cross-anisotropy in Asphalt Concrete (AC) on pavement responses, i.e., stress-strain, and performance, i.e., damage due to fatigue and permanent deformation. To date, a full-scale Finite Element Model (FEM) of an instrumented pavement section is developed in ABAQUS 6-EF-2. Laboratory tests were c ...
  • Pilot Study for Preventing Incorrect Turns at HighwayRail Grade Crossings
    Pilot Study for Preventing Incorrect Turns at Highway-Rail Grade Crossings
    Lin, Pei-Sung ;
    Wang, Zhenyu
    2017-12-30 | PDF
    Incorrect turns at highway-rail grade crossings are a serious issue in traffic safety management. According to previous studies, there are five major contributing causes of incorrect turns onto railroad tracks. Among them, potentially misleading signs and pavement markings near highway-rail crossings could confuse some drivers and lead them to make ...
    Supporting Files
  • Special Provisions for Intelligent Compaction of Stabilized Soil Subgrades
    Special Provisions for Intelligent Compaction of Stabilized Soil Subgrades
    Commuri, Sesh ;
    Zaman, Musharraf M.
    2017-12-30 | PDF
    Intelligent Compaction (IC) of soil and asphalt mixes is an innovative approach that has been utilized to achieve uniform, adequate compaction of pavement layers during construction. Commercially available IC products provide machine specific compaction values that are indirectly related to the compaction quality (stiffness) of the pavement layers. ...
  • Identifying Dust Emission Hot Spots in the Southern Plains Region of New Mexico Oklahoma and Texas Effect of Blowing Dust on Highway
    Identifying Dust Emission "Hot Spots" in the Southern Plains Region of New Mexico, Oklahoma and Texas : Effect of Blowing Dust on Highway
    Li, Junran ;
    Lee, Jeffrey A.
    2017-12-30 | PDF
    Windblown dust poses a significant hazard to highway safety. Dust contributes to chain-reaction traffic accidents every year in the southwestern US, however, no known studies have specifically investigated this issue in New Mexico, Oklahoma, and Texas. In this study, we used remotely sensed and in situ observations of land cover, soil, and vegetati ...
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