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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 6621 - 6640 of 36104 results
  • Seismic Performance of SeatType Abutment Highway Bridges in Illinois
    Seismic Performance of Seat-Type Abutment Highway Bridges in Illinois
    LaFave, James M. ;
    Fahnestock, Larry
    2018-08-01 | PDF
    This study assesses the seismic performance of quasi-isolated highway bridges with seat-type abutments, validates the current IDOT design strategy, and provides recommendations for improving a bridge’s seismic behavior. To encompass common configurations of highway bridges with non-seismically designed bearing components employed as sacrificial con ...
  • Permit Fee Policies for OversizeOverweight Vehicles Transportation Research Synthesis
    Permit Fee Policies for Oversize/Overweight Vehicles [Transportation Research Synthesis]
    Kline, Christine F. ;
    Casey, Patrick C.
    2018-08-01 | PDF
    Since the early 1990s, the state of Minnesota has been considering a move toward a unified permitting process (UPP) for oversize/overweight (OSOW) vehicles. The multiphase UPP project now underway will, over the long term, establish the framework for a statewide “one-stop shop” permitting system. This streamlined permitting process is expected to i ...
  • Pavement Roughness Measurement Using Android Smartphones Case Study of Missouri Roads and Airports
    Pavement Roughness Measurement Using Android Smartphones: Case Study of Missouri Roads and Airports
    Buttlar, William G. ;
    Alavi, Amir
    2018-08-01 | PDF
    Keeping airport pavement in good condition requires accurate and timely data on existing pavement conditions. Since many existing pavement survey methods can be costly and labor intensive, there is a need for simple and low cost tools to facilitate the evaluation of airport pavement condition for smaller airports with limited resources. To address ...
  • Understanding the Accessibility Economic and Social Equity Impacts of Urban Greenway Infrastructure
    Understanding the Accessibility, Economic and Social Equity Impacts of Urban Greenway Infrastructure
    Liu, Jenny Hsing-I ;
    Shi, Wei
    2018-08-01 | PDF
    “City Greenways” is a concept proposed as a part of Portland’s 2035 Comprehensive Plan, which calls for a citywide network of park-like pedestrian and bicycle friendly streets crisscrossing the city at roughly three-mile intervals. This research establishes several approaches to measure the transportation network impact of the “City Greenways” and ...
  • Effect of Proximity of Sheet Pile Walls on the Apparent Capacity of Driven Displacement Piles
    Effect of Proximity of Sheet Pile Walls on the Apparent Capacity of Driven Displacement Piles
    Chung, Jae H. ;
    McVay, Michael C.
    2018-08-01 | PDF
    The present research investigated the effects that installation and removal of sheet pile walls (SPW) have on driven piles founded in granular soils. The efforts completed as part of the present study have involved both physical testing and numerical simulation of standardized laboratory tests on granular materials. Further, physical centrifuge tes ...
  • Development and Field Testing of an Integrated Dynamic Transit Operation System
    Development and Field Testing of an Integrated Dynamic Transit Operation System
    Meng, Huadong ;
    Li, Dachuan
    2018-08-01 | PDF
    This report documents the research efforts to the design and development of an Integrated Dynamic Transit Operation System for suburban transit operations. The key concepts and operational scenarios for IDTO are specified based on the system requirements, and the IDTO system architecture is designed as an information system, along with the key func ...
  • Opportunistic Traffic Sensing Using Existing Video Sources Phase II Final Report 2018
    Opportunistic Traffic Sensing Using Existing Video Sources (Phase II) Final Report [2018]
    Eriksson, Jakob ;
    Jin, Yanzi
    2018-08-01 | PDF
    The objective of this project was to produce accurate vehicle counts and turn counts from opportunistically acquired video sources such as surveillance, red light, and other traffic cameras, using computer vision techniques. The project scope included algorithm design, software development, and a web portal for practitioner use.
  • Software for Load Distribution on LowFill Box Culverts Users Manual
    Software for Load Distribution on Low-Fill Box Culverts: User’s Manual
    Han, Jie ;
    Rahmaninezhad, Sayed Mustapha
    2018-08-01 | PDF
    Reinforced concrete box culverts have mostly been installed at shallow depths under roadways for drainage. The effect of traffic loads on the shallowly buried culverts is more significant than that on culverts at greater depths. The distribution of traffic loads onto the culverts is used to determine the rating factors of these structures. The Amer ...
    Supporting Files
  • DataDriven Health Management of Electrical Vehicle Battery Systems
    Data-Driven Health Management of Electrical Vehicle Battery Systems
    Wang, Pingfeng ;
    Krishnan, Krishna
    2018-08-01 | PDF
    The objectives of this research were to conduct theoretical and experimental investigations to develop a new battery health management paradigm based on a novel, self-cognizant dynamic system (SCDS) approach to predict and prevent failures of safety-critical battery systems (e.g., lithium plating and thermal runaway) for electric vehicles (EVs) and ...
  • Experimental Fatigue Assessment of CFRPRetrofitted Reinforced Concrete Beams Subjected to Service Temperatures
    Experimental Fatigue Assessment of CFRP-Retrofitted Reinforced Concrete Beams Subjected to Service Temperatures
    Mahmoud, Hussam ;
    Memari, Mehrdad
    2018-08-01 | PDF
    The use of Carbon Fiber Reinforced Polymers (CFRP) for the repair of civil infrastructure has been on the rise. Most studies have focused on the effect of CFRP to increase the stiffness and strength of reinforced concrete beams or columns. Limited attention has been given to the effect of CFRP on mitigating fatigue crack growth in steel reinforceme ...
  • Implementing the Green Dot Bystander Intervention Program to Promote Respectful Workplaces in the Construction Trades in Oregon
    Implementing the Green Dot Bystander Intervention Program to Promote Respectful Workplaces in the Construction Trades in Oregon
    Kelly, Maura ;
    Wilkinson, Lindsey
    2018-08-01 | PDF
    Oregon, like all states across the U.S., has faced challenges in recruiting and retaining a diverse construction workforce. In 2011, the Oregon Bureau of Labor and Industries and the Oregon Department of Transportation partnered to fund the BOLI/ODOT Highway Construction Workforce Development Program, which is intended to improve the stability and ...
  • Shaking Table Tests to Evaluate Effectiveness of Vertical Drains for Liquefaction Mitigation
    Shaking Table Tests to Evaluate Effectiveness of Vertical Drains for Liquefaction Mitigation
    Rollins, Kyle M. ;
    Oakes, Caleb
    2018-08-01 | PDF
    This research was designed to evaluate the ability of vertical drains to prevent liquefaction and limit associated settlement. Drain performance was investigated using full-scale tests with vertical drains in liquefiable sand using a laminar shear box with acceleration time histories applied at the base. Performance of the sand box with drains in t ...
  • National University Transportation Consortium A Speaker August 2018 Recognition Based Damage Detection
    National University Transportation Consortium: A Speaker August 2018 Recognition Based Damage Detection
    Betti, Raimondo
    2018-08-01 | PDF
    In this study, an adaptation of Mel-Frequency Cepstral Coefficients as damage sensitive features for structural health monitoring of civil structures was addressed. Typically used in speaker recognition methodologies, these indices offer an extremely easy extracting process with a few user-defined parameters and a low computational burden and they ...
  • Joint Sawing Practices And Effects on Durability
    Joint Sawing Practices And Effects on Durability
    Crovetti, James A. ;
    Kevern, John T.
    2018-08-01 | PDF
    Joint deterioration has become a renewed concern for concrete pavements in Northern climates. Recently, a large number of relatively young pavements (less than 20 years) have experienced premature joint deterioration requiring disproportionately high amounts of maintenance. While specifications and testing help to identify d- cracking aggregates, o ...
  • Lateral Resistance of HPiles and Square Piles Behind an MSE Wall With Ribbed Strip and Welded Wire Reinforcements
    Lateral Resistance of H-Piles and Square Piles Behind an MSE Wall With Ribbed Strip and Welded Wire Reinforcements
    Rollins, Kyle M. ;
    Luna, Andrew I
    2018-08-01 | PDF
    A Mechanically Stabilized Earth (MSE) retaining wall was constructed, and piles were driven at various distances behind the wall. Lateral pile load tests were conducted in the direction of the wall, and the performance of the pile, wall, and reinforcement were measured. For this part of the overall study, the piles were 12-inch H-piles and square p ...
  • Lateral Resistance of Abutment Piles Behind Mechanically Stabilized Earth MSE Walls Final Summary Report 1 for Study TPF5272
    Lateral Resistance of Abutment Piles Behind Mechanically Stabilized Earth (MSE) Walls: Final Summary Report #1 for Study TPF-5(272)
    Rollins, Kyle M. ;
    Luna, Andrew I
    2018-08-01 | PDF
    A full-scale mechanically stabilized earth (MSE) wall was constructed and 24 lateral load tests were conducted on piles spaced at distances of about 2 to 5 pile diameters (D) from the back face of the wall to the center of the pile. Sixteen of the tests involved pipe piles, four tests involved H-piles, and four tests involved square piles. Lateral ...
  • Finite Element Analysis of Vehicle Dynamics on Single Slope Barriers Under MASH Testing
    Finite Element Analysis of Vehicle Dynamics on Single Slope Barriers Under MASH Testing
    Scott, D. W. ;
    Stewart, L. K.
    2018-08-01 | PDF
    The Georgia Tech research team utilized the commercially available finite element program LS-DYNA to simulate impacts of a number of vehicles with two sloped barriers under specific impact conditions from the AASHTO Manual for Assessing Safety Hardware (MASH). The vehicle categories chosen for the analysis were a standard passenger car, light picku ...
  • Lidar for Maintenance of Pavement Reflective Markings and Retroreflective Signs
    Lidar for Maintenance of Pavement Reflective Markings and Retroreflective Signs
    Olsen, Michael J. ;
    Parrish, Christopher
    2018-08-01 | PDF
    Pavement markings and signs are important traffic control devices used to guide and regulate traffic movement through visual information presented to motorists. Signs and markings are made with retroreflective materials to enhance visibility for motorists, particularly at night. Retroreflectivity evaluation of an extensive highway network for maint ...
  • Evaluation of the Mechanical and Environmental Performance of Biofuel CoProduct Stabilized Unpaved Roads
    Evaluation of the Mechanical and Environmental Performance of Biofuel Co-Product Stabilized Unpaved Roads
    Cetin, Bora ;
    Ashlock, Jeramy
    2018-08-01 | PDF
    More than 50% of roadways in Iowa are classified as unpaved. The performance and long-term sustainability of such roads are dependent on the quality of the surfacing material, which varies considerably by location. The large, unbound particles form an unstable road surface that becomes rough, developing potholes and corrugations as the “floating” m ...
    Supporting Files
  • Systemic LowCost Countermeasures for an Unsignalized Intersection Safety Improvement Plan for Virginia
    Systemic Low-Cost Countermeasures for an Unsignalized Intersection Safety Improvement Plan for Virginia
    Lim, In-Kyu ;
    Cottrell, Benjamin H., Jr.
    2018-08-01 | PDF
    With more than 80,000 unsignalized intersections in Virginia, determining how and where to focus limited highway safety resources through deployment of low-cost, high-benefit systemic countermeasures is paramount to beginning to reduce the number of fatal and injury crashes at unsignalized intersections in Virginia. The purpose of this study was to ...
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