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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 6321 - 6340 of 36958 results
  • Noise Wall Overhang Design
    Noise Wall Overhang Design
    Sperry, Benjamin R. ;
    Staley, Blake
    2019-04-01 | PDF
    The purpose of this research study was to determine if a roadway-side overhang component could provide meaningful noise reduction and air quality benefits for ODOT's noise walls in a manner that is cost-effective and meets all of ODOT’s structural design requirements. A comprehensive review of literature was conducted to identify past research on o ...
  • Analysis of Performance Measures of Traffic Incident Management in Utah
    Analysis of Performance Measures of Traffic Incident Management in Utah
    Schultz, Grant G. ;
    Saito, Mitsuru
    2019-04-01 | PDF
    In 2009 the Federal Highway Administration published a report regarding a Focus States Initiative that had been conducted with 11 states to discuss the development of national Traffic Incident Management (TIM) standards. Performance measures were defined, and a national TIM dashboard created, but very little data has been added to the dashboard sin ...
  • Western Slope Wildlife Prioritization Study
    Western Slope Wildlife Prioritization Study
    Kintsch, Julia ;
    Basting, Pat
    2019-04-01 | PDF
    The Western Slope Wildlife Prioritization Study (WSWPS) emerged from a commitment to increased collaboration between CDOT and Colorado Parks and Wildlife (CPW) to address wildlife conflicts on roads. The study’s objective involved identifying wildlife-highway conflict areas where targeted mitigation could have the greatest impact on reducing WVCs. ...
  • Pavement Acceptance Testing RiskControlled Sampling Strategy
    Pavement Acceptance Testing: Risk-Controlled Sampling Strategy
    Cai, Jiannan ;
    Gao, Qingyi
    2019-04-01 | PDF
    Acceptance testing is a critical aspect of the quality control and quality assurance (QC/QA) program to ensure the reliable long-term performance of pavement. A typical acceptance testing specification includes acceptable quality characteristics (AQCs), testing methods, number of samples, sample locations, and acceptance criteria. In the current pr ...
  • Large Scale Evaluation of Erosion Resistance of Biocementation against Bridge Scour and Roadway Shoulder Erosion
    Large Scale Evaluation of Erosion Resistance of Biocementation against Bridge Scour and Roadway Shoulder Erosion
    Li, Lin ;
    Li, Yadong
    2019-04-01 | PDF
    Soil is a living ecosystem where biogeochemical processes such as mineral precipitation, gas generation, biofilm formation and biopolymer generation are ubiquitous. Microbially induced calcite precipitation (MICP) is a sustainable method and a bio-geochemical process that induces calcium carbonate precipitation within the soil matrix as a consequen ...
  • Durable UHPC Columns with HighStrength Steel
    Durable UHPC Columns with High-Strength Steel
    Aboukifa, Mahmoud ;
    Moustafa, Mohamed A.
    2019-04-01 | PDF
    Ultra-High Performance Concrete (UHPC) is a versatile building material as it is characterized by very high compressive strengths reaching 200 MPa (30 ksi), ductile tensile characteristics, and energy absorption. Currently, UHPC is commonly used in small structural applications, such as joints and connections between precast structural elements. Ho ...
  • Georgia LongTerm Pavement Performance GALTPP Program Maintaining Georgias Calibration Sites and Identifying the Potential For Using MEPDG For Characterization Of NonStandard Materials and Methods Phase 2
    Georgia Long-Term Pavement Performance (GALTPP) Program – Maintaining Georgia’s Calibration Sites and Identifying the Potential For Using MEPDG For Characterization Of Non-Standard Materials and Methods, Phase 2
    Wu, Yiching ;
    Tsai, Yichang (James)
    2019-04-01 | PDF
    The Georgia Department of Transportation (GDOT) has initiated a Georgia long-term pavement performance (GALTPP) program to provide data for the calibration of the Mechanistic-Empirical Pavement Design Guide (MEPDG) and to monitor sites for evaluating the effect of various materials and treatment methods on pavement performance. Phase 2 of the proje ...
  • Concrete Patching Materials and Techniques and Guidelines for Hot Weather Concreting
    Concrete Patching Materials and Techniques and Guidelines for Hot Weather Concreting
    Weiss, W Jason ;
    Zavattieri, Pablo
    2019-04-01 | PDF
    High early strength (HES) concrete is becoming increasingly used to repair damaged concrete pavement sections. The use of HES concrete enables the repaired pavement to be opened to traffic within hours of placing the concrete. Rapid repair of concrete pavement is an attractive solution since the traveling public is not delayed by the repair of the ...
  • Rerefined Engine Oil Bottom Detection and Upper Limits in Asphalt Binders and Seal Coat Binders
    Re-refined Engine Oil Bottom: Detection and Upper Limits in Asphalt Binders and Seal Coat Binders
    Karki, Pravat ;
    Meng, Lingyu
    2019-04-01 | PDF
    Many state departments of transportation have adopted the Superpave PG specification since the completion of the Strategic Highway Research Program in 1993. A much wider range of crude oil sources and binder modification techniques are being used now to produce asphalt binders. Although asphalt binders used these days still meet the requirements of ...
  • Development of Load and Resistance Factor Design Procedures for Driven Piles on Soft Rocks in Wyoming
    Development of Load and Resistance Factor Design Procedures for Driven Piles on Soft Rocks in Wyoming
    Ng, Kam ;
    Adhikari, Pramila
    2019-04-01 | PDF
    Static Analysis methods originally developed for soils are currently used for estimating pile resistances in Intermediate Geomaterials (IGMs), and structural capacity has been considered as the limiting pile capacity on hard rocks. The application of current Load and Resistance Factor Design (LRFD) for piles in IGMs has resulted in relatively high ...
  • Behaviorbased Predictive Safety Analytics Pilot Study
    Behavior-based Predictive Safety Analytics – Pilot Study
    Engström, Johan ;
    Miller, Andrew
    2019-04-01 | PDF
    This report gives an overview of the main findings from the Behavior-based Predictive Safety Analytics – Pilot Study project. The main objective of the project was to investigate the possibilities of developing statistical models predicting individual driver crash involvement based on individual driving style, demographic and behavioral history var ...
  • Shake Table Studies of a Bridge System with ABC Connections
    Shake Table Studies of a Bridge System with ABC Connections
    Shoushtari, Elmira ;
    Saiidi, Mehdi Saiid
    2019-04-01 | PDF
    Accelerated bridge construction (ABC) reduces the onsite construction time by utilizing prefabricated elements. Connections between prefabricated elements are critical in high seismic areas to maintain the integrity of the bridge system. Various ABC connections have been investigated at the component level to build a solid understanding of their lo ...
  • Evaluation of Sediment Barrier Practices using LargeScale Testing Techniques SmallScale Performance Evaluations of Geotextiles used in Silt Fence Applications
    Evaluation of Sediment Barrier Practices using Large-Scale Testing Techniques: Small-Scale Performance Evaluations of Geotextiles used in Silt Fence Applications
    Whitman, J. Blake ;
    Donald, Wesley N.
    2019-04-01 | PDF
    Silt fence has long been used as a means for intercepting and treating construction site stormwater runoff prior to offsite discharge. Standard small-scale testing methodologies for evaluating the filtering component of silt fence installations have failed to mimic realistic flows and sediment loadings commonly placed on such sediment control pract ...
  • MASH TL4 Evaluation of 2019 MASH 2Tube Bridge Rail
    MASH TL-4 Evaluation of 2019 MASH 2-Tube Bridge Rail
    Williams, William F. ;
    Menges, Wanda L.
    2019-04-01 | PDF
    The purpose of the tests reported herein was to assess the performance of a new, taller Alaska MultiState 2-Tube Bridge Rail (re-designated as 2019 MASH 2-Tube Bridge Rail) according to the safety-performance evaluation guidelines included in the American Association of State Highway and Transportation Officials (AASHTO), Manual for Assessing Safet ...
  • Development of MEPDG Input Database for Asphalt Mixtures
    Development of MEPDG Input Database for Asphalt Mixtures
    Kim, S. Sonny ;
    Etheridge, J. Robert A
    2019-04-01 | PDF
    Fatigue cracking is one of the most critical distresses involved in flexible pavement failure. For state departments of transportation, the accurate prediction of flexible pavement service life in terms of potential fatigue cracking is crucial for pavement design, maintenance, and rehabilitation. Therefore, it is imperative to understand the asphal ...
  • FieldTestBased Guideline Development for the Integration of Unmanned Aerial Systems UASs in GDOT Operations
    Field-Test-Based Guideline Development for the Integration of Unmanned Aerial Systems (UASs) in GDOT Operations
    Irizarry, Javier ;
    Johnson, Eric N.
    2019-04-01 | PDF
    This project aimed at developing guidelines for the integration of Unmanned Aerial Systems (UASs) in Georgia Department of Transportation (GDOT) operations based on the experience and lessons learned from field tests with UAS technology on selected tasks performed by several groups within GDOT. The research team conducted three focus group sessions ...
  • Using WIM Systems and Tube Counters to Collect and Generate ME Traffic Data for Pavement Design and Analysis Technical Report
    Using WIM Systems and Tube Counters to Collect and Generate ME Traffic Data for Pavement Design and Analysis: Technical Report
    Walubita, Lubinda F. ;
    Lee, Sang I.
    2019-04-01 | PDF
    Axle load spectra data, typically from permanent weigh-in-motion (WIM) stations, constitute the primary mechanisticempirical (ME) traffic data input for accurate and optimal pavement design and analysis. However, due to the limited number of available permanent WIM stations (mostly located on interstate highways), most ME pavement designs rely on a ...
  • Crash Testing and Evaluation of TL2 Short Radius Guardrail Treatment
    Crash Testing and Evaluation of TL-2 Short Radius Guardrail Treatment
    Abu-Odeh, Akram Y. ;
    Menges, Wanda L.
    2019-04-01 | PDF
    The purpose of the testing reported herein was to assess the performance of the Manual for Assessing Safety Hardware (MASH) TL-2 low-speed short radius guardrail treatment according to the safety-performance evaluation guidelines included in American Association of State Highway and Transportation Officials MASH. The crash tests performed were in a ...
  • Determination of Constructed Pavement Layer Thicknesses Using Nondestructive Testing NDT
    Determination of Constructed Pavement Layer Thicknesses Using Nondestructive Testing (NDT)
    Rister, Brad ;
    Creech, Jamie
    2019-04-01 | PDF
    Using nondestructive testing (NDT) to measure the thickness of pavement layers can improve the overall life of a new concrete and/or asphalt pavement. Conventional test methods require the extraction of a core from the pavement section to verify its thickness. Currently, two NDT technologies are commercially available which eliminate or reduce the ...
  • Fresh Air Content Test Methods and Analysis of Hardened Air Content in Wisconsin Pavements Research Brief
    Fresh Air Content Test Methods and Analysis of Hardened Air Content in Wisconsin Pavements [Research Brief]
    Cramer, Steven M.
    2019-04-01 | PDF
    Concrete pavements in cold climates suffer from freeze-thaw deterioration. Entrained air void systems, miniscule pockets of air created during concrete mixing, mitigate freeze-thaw damage by providing reservoirs for water to expand as it freezes and by suctioning water from surrounding mesopores to reduce pressure within the concrete. Air entrainin ...
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