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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 5821 - 5840 of 36958 results
  • Structural Engineering Research OnCall Services Task 3 Ground Penetrating Radar Surveys on WOO751294
    Structural Engineering Research On-Call Services Task 3 – Ground Penetrating Radar Surveys on WOO-75-1294
    Steinberg, Eric P ;
    Khoury, Issam
    2019-09-01 | PDF
    The Ohio Department of Transportation requested from ORITE to conduct GPR runs to ascertain the thickness of cover above the top rebar layer of Woody County bridge WOO-75-1294 on interstate 75 over U.S. route 6. The main purpose of these surveys was to see if there was enough cover on top of the rebar to allow grinding of the concrete surface. Surv ...
  • Structural Engineering Research OnCall Services Task 2 Aluminum Truss Overhead Sign Support Flange Damage Assessment
    Structural Engineering Research On-Call Services Task 2 – Aluminum Truss Overhead Sign Support Flange Damage Assessment
    Steinberg, Eric P ;
    Miller, Richard A.
    2019-09-01 | PDF
    A variety of structural supports exist to mount signs along highways. One type of support is a truss that spans the width of the highway that allows for the placement of overhead signs. These trusses are subject primarily to wind and gravity loads. The connections between the chords and the diagonals are typical fillet welded. Fillet welds are a fa ...
  • Galvanized and Aluminized Pipe Durability Field Review and Evaluation
    Galvanized and Aluminized Pipe Durability Field Review and Evaluation
    Tucker-Kulesza, Stacey ;
    Augustine, Luke
    2019-09-01 | PDF
    Two studies were conducted by the Kansas Department of Transportation (KDOT) in the 1980s to evaluate the performance of corrugated metal pipe (CMP) after a 1974 pipe policy change. This report is a follow-up study to evaluate the impact of the study initiated in 1989 and another pipe policy change in 2001. A total of 81 CMPs were inspected in Dist ...
  • Evaluation of Pedestrian Hybrid Beacons on Arizona Highways
    Evaluation of Pedestrian Hybrid Beacons on Arizona Highways
    Fitzpatrick, Kay ;
    Cynecki, Michael J.
    2019-09-01 | PDF
    The pedestrian hybrid beacon (PHB) is a traffic control device used at pedestrian crossings. It was first included in the 2009 Manual on Uniform Traffic Control Devices. The focus of this Arizona Department of Transportation (ADOT) research was to: investigate the safety and operational impacts of the PHB installations that have occurred on Arizona ...
  • Life Cycle Assessment With Primary Data on Heavy Rare Earth Oxides From IonAdsorption Clays
    Life Cycle Assessment With Primary Data on Heavy Rare Earth Oxides From Ion-Adsorption Clays
    Deng, Huijing ;
    Kendall, Alissa
    2019-09-01 | PDF
    Heavy and light rare earth elements (REEs) are critical to clean energy technologies, and thus the environmental impacts from their production are increasingly scrutinized. Most previous LCAs of REE production focus on sites producing light REEs. This research addresses this gap by collecting primary data from sites producing heavy rare earth oxide ...
  • Unbound Materials Characterization for Pavement ME Implementation in Idaho
    Unbound Materials Characterization for Pavement ME Implementation in Idaho
    Mishra, Debakanta ;
    Jibon, Md
    2019-09-01 | PDF
    This research study focused on laboratory testing of typical subgrade soils and unbound aggregates used in pavement applications across the state of Idaho. A total of eighteen (18) aggregates and sixteen (16) subgrade soils were tested in the laboratory to support ITD’s efforts towards statewide implementation of Mechanistic-Empirical (M-E) pavemen ...
  • Airfield Pavement Management Framework using a MultiObjective Decision Making Process
    Airfield Pavement Management Framework using a Multi-Objective Decision Making Process
    Wang, Hao ;
    Guo, Lukai
    2019-09-01 | PDF
    Airfield pavement management system uses pavement condition indexes to evaluate pavement conditions for timely planning of maintenance and rehabilitation (M&R). Using the comprehensive Federal Aviation Administration (FAA) PAVEAIR database, this study aims to investigate the consistency and relationship of three indexes: pavement condition index (P ...
  • Incorporation of SpeedTravelTime Data Sets in Traffic Performance Analysis
    Incorporation of Speed/Travel-Time Data Sets in Traffic Performance Analysis
    Refai, Hazem H. ;
    Ahmed, Samir
    2019-09-01 | PDF
    An accurate Travel Time (TT) information is essential for traffic prediction and analysis. Correct TT measurements can be used to reduce congestions, improve safety and enhance traffic flow. The work detailed in this paper reports on the development and implementation of an inexpensive Bluetooth traffic monitoring system for reliable and real-time ...
  • Evaluation of WIM AutoCalibration Practices and Parameters
    Evaluation of WIM Auto-Calibration Practices and Parameters
    Hernandez, Sarah ;
    Baker, Josh
    2019-09-01 | PDF
    Weigh-in-Motion (WIM) systems capture weight and axle configurations of vehicles using the state highway network and serve as valuable and essential input for evaluating the performance of our transportation infrastructure. To produce accurate weights, sensors must be calibrated at regular intervals. Since on-site calibration can be costly, several ...
  • Using ATSPM Data for Traffic Data Analytics
    Using ATSPM Data for Traffic Data Analytics
    Chamberlin, Robert ;
    Fayyaz, Kiavash
    2019-09-01 | PDF
    UDOT performs about 6000 short-duration counts over a three-year cycle to estimate and report AADT on roadways per FHWA requirements. Many of these roadways are in proximity to signalized intersections equipped with radar detectors that provide approach and turning movement counts. This research investigates the use of volume data obtained from tra ...
  • Structural Engineering Research OnCall Services Task 4 Investigation Into the Failure of Piles for POR140630 Bridge
    Structural Engineering Research On-Call Services: Task 4 – Investigation Into the Failure of Piles for POR-14-0630 Bridge
    Steinberg, Eric P ;
    Miller, Richard A.
    2019-09-01 | PDF
    On October 3, 2016, ODOT was notified that a bridge over Lake Rockwell on State Route 14 (POR 14-0630) appeared to have settled. ODOT personnel traveled to the site within hours and closed the bridge. Review by ODOT revealed that 12 steel H-piles supporting the two piers had buckled near the waterline. Based on the severity of damage, ODOT decided ...
  • Analysis of Traffic Crash Data in Kentucky 20142018
    Analysis of Traffic Crash Data in Kentucky (2014-2018)
    Green, Eric R. ;
    Agent, Kenneth R.
    2019-09-01 | PDF
    This report documents an analysis of traffic crash data in Kentucky for the years of 2014-2018. A primary objective of this study was to determine average crash statistics for Kentucky highways. Rates were calculated for various types of highways and for counties and cities. Difference criteria were used for exposure. Average and critical numbers a ...
  • Effective and Economical Cleaning of Pipes and Underdrains Phase II
    Effective and Economical Cleaning of Pipes and Underdrains – Phase II
    Schneider, William H. ;
    Teter, Zachery R.
    2019-09-01 | PDF
    The Ohio Department of Transportation (ODOT) maintains 43,000 lane miles of roadway in order to allow the public to safely and efficiently travel throughout Ohio. One of the tasks that ODOT is responsible for is the maintenance of drainage assets. ODOT utilizes a vacuum jet truck (VJT) to clean all drainage assets. The size, required manpower, lack ...
  • Developing UltraHighPerformance Concrete Mix Designs for Arizona Bridge Element Connections
    Developing Ultra-High–Performance Concrete Mix Designs for Arizona Bridge Element Connections
    Mobasher, Barzin ;
    Arora, Aashay
    2019-09-01 | PDF
    This report addresses the development of non-proprietary mix designs for manufacturing ultra-high–performance concrete (UHPC) mixtures using materials commercially available in Arizona. The comprehensive work carried out addresses the development of paste, mortar, and concrete mixtures based on theoretical, analytical, and experimental optimization ...
  • Human Factors Study on the Use of Colors for Express Lane Delineators Summary
    Human Factors Study on the Use of Colors for Express Lane Delineators [Summary]
    Abou-Senna, Hatem
    2019-09-01 | PDF
    University of Central Florida researchers conducted a series of human factors studies to determine the response to drivers in various groups to delineator color and the effect on their driving performance.
  • Macro Synthetic Fiber Reinforcement for Improved Structural Performance of Concrete Bridge Girders Summary
    Macro Synthetic Fiber Reinforcement for Improved Structural Performance of Concrete Bridge Girders [Summary]
    Hamilton, H. R.
    2019-09-01 | PDF
    University of Florida researchers studied the use of fiber-reinforced concrete to control cracking in the end region of concrete girders.
  • Incorporating Wildlife Passive use Values in Collision Mitigation BenefitCost Calculations
    Incorporating Wildlife Passive use Values in Collision Mitigation Benefit-Cost Calculations
    Duffield, John ;
    Neher, Chris
    2019-09-01 | PDF
    This document is a task report for a larger Wildlife Vehicle Collision (WVC) Reduction and Habitat Connectivity pooled fund study. It addresses the potential use of passive use economic values for wildlife to inform the mitigation of wildlife vehicle collisions. Passive use, also known as non-use values, are the values individuals place on the exis ...
  • UAS Drone Peer Exchange
    UAS (Drone) Peer Exchange
    Stott, Glenn ;
    Leli, Janet
    2019-09-01 | PDF
    The 2017 NJDOT Peer Exchange was held on October 3-5th in Trenton, New Jersey. The panelists included state DOT UAS leaders from Delaware, Kansas, Massachusetts, New Jersey, North Carolina, and Pennsylvania, as well as UAS leaders from the FAA, New Jersey State Police, and the NJ State Forest Fire Service. The Peer Exchange was intended to share UA ...
  • Assessment of Planning Risks and Alternative Futures for the Florida Transportation Plan
    Assessment of Planning Risks and Alternative Futures for the Florida Transportation Plan
    Smith, Dennis ;
    Giesige, Amanda
    2019-09-01 | PDF
    The Florida Department of Transportation (FDOT) recognizes that changes in demographics, economics, technology, the environment, and global issues will create planning risks for Florida’s transportation system. In preparation for the 2020 update of the Florida Transportation Plan (FTP), FDOT contracted Florida State University’s Barnebey Planning & ...
  • Performance of Bridge Deck Overlays in Virginia Phase II Service Life Performance
    Performance of Bridge Deck Overlays in Virginia: Phase II: Service Life Performance
    Balakumaran, Soundar S G ;
    Weyers, Richard E
    2019-09-01 | PDF
    This Phase II report reports on an extensive data collection process that led to the development of a robust database of 133 overlaid bridge decks after verification of historical inspection reports, verification of as-built plans and communication with VDOT district bridge engineers. This helped in developing a model for understanding the amount o ...
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