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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 1561 - 1580 of 35865 results
  • Forecasting TSPLOST Revenues in Georgia
    Forecasting TSPLOST Revenues in Georgia
    Bluestone, Peter ;
    Jimenez, Benedict
    2023-10-01 | PDF
    Due to the long-term planning involved in the design and construction of transportation infrastructure projects, transportation planners need reliable long-run forecasts and stable sources of revenue over the project timeline. Funding streams typically vary from period to period due to inherent volatility in the funding source or unforeseen events, ...
  • Evaluation of LargeFormat Metallic Additive Manufacturing AM for Steel Bridge Applications Final Report of Tensile Impact and Fatigue Testing Results
    Evaluation of Large-Format Metallic Additive Manufacturing (AM) for Steel Bridge Applications: Final Report of Tensile, Impact, and Fatigue Testing Results
    Sherman, Ryan J. ;
    Kessler, Hannah D
    2023-10-01 | PDF
    Wire arc additive manufacturing (WAAM) is an additive manufacturing process capable of printing using metallic feedstocks, such as traditional welding wire consumables. Advances in WAAM allow large-scale components, measured on the scale of feet, to be fabricated. A lack of fundamental knowledge of the material and fatigue behaviors of WAAM current ...
  • A Feasibility Study for Establishing A Regional Road Track Pavement Testing Facility in Wyoming Data Management Plan
    A Feasibility Study for Establishing A Regional Road Track Pavement Testing Facility in Wyoming [Data Management Plan]
    Hafez, Marwan ;
    Ksaibati, Khaled
    2023-10-01 | PDF
    The purpose of this research project is to: evaluate the feasibility of constructing a state-of-the-art pavement testing facility on I-80 in Wyoming to conduct pavement research studies for the dry freeze climatic region.
  • Evaluation of Roadway HighMast Tower Lighting
    Evaluation of Roadway High-Mast Tower Lighting
    Gibbons, Ronald B ;
    Bhagavathula, Rajaram
    2023-10-01 | PDF
    This study conducted an evaluation of high-mast roadway lighting, which included a review of Illinois Department of Transportation’s high-mast lighting specification and a field experiment. The lighting specification was reviewed for potential cost-saving measures. Recommended changes included the use of an external drive mechanism, a design-by-app ...
  • Research and Findings on Roundabouts and Innovative Intersections for HighSpeed and Rural Locations
    Research and Findings on Roundabouts and Innovative Intersections for High-Speed and Rural Locations
    Brewer, Marcus A. ;
    Fitzpatrick, Kay
    2023-10-01 | PDF
    Texas has thousands of centerline-miles of high-speed roadways where access might traditionally have been restricted, but there are an increasing number of high-speed roadways that have at-grade intersections and driveways. Innovative intersection designs (e.g., j-turns, median U-turns) and modern roundabouts have been used to remove conflict point ...
    Supporting Files
  • Durability of Concrete Using Low Slag Cement Contents
    Durability of Concrete Using Low Slag Cement Contents
    Riding, Kyle A ;
    Ferraro, Christopher C.
    2023-10-01 | PDF
    Supplemental cementitious materials (SCMs), such as fly ash, slag, silica fume, and metakaolin have become commonplace in Florida concrete, particularly for high durability or high-strength concrete. The Florida Department of Transportation (FDOT) currently allows fly ash to be used as a cement replacement at 18-50% levels and slag cement to be sub ...
  • Drying Shrinkage Response of FullScale Thin Concrete Overlay on Asphalt Sections
    Drying Shrinkage Response of Full-Scale Thin Concrete Overlay on Asphalt Sections
    Mateos, Angel ;
    Harvey, John
    2023-10-01 | PDF
    Moisture-related shrinkage is regarded as one of the phenomena that has the largest impacts on the performance of jointed plain concrete pavements. Still, most mechanistic-empirical design methods oversimplify or ignore predictions of moisture-related shrinkage and its effects on concrete pavements. This study evaluates how moisture-related shrinka ...
  • Impact of IncentiveDisincentive Specifications on LongTerm Asphalt Pavement Performance Summary
    Impact of Incentive/Disincentive Specifications on Long-Term Asphalt Pavement Performance [Summary]
    Lee, Hyung S ;
    Choubane, Bouzid
    2023-10-01 | PDF
    FDOT’s Percent Within Limits (PWL) specification for acceptance and payment of asphalt materials was first implemented in 2002. The objective of this study was to determine the level of impact that FDOT’s PWL specification has on the long-term performance of asphalt pavements. To meet this objective, Multinomial Logistic Regression Analyses (MLRA) ...
  • Utilizing Reclaimed Asphalt Pavement in Preservation Treatments
    Utilizing Reclaimed Asphalt Pavement in Preservation Treatments
    Sayeh, Watheq ;
    Al-Qadi, Imad L
    2023-10-01 | PDF
    The use of reclaimed asphalt pavement (RAP) has economic and environmental impacts. This report investigates the prospective use of RAP in preservation treatments (mainly chip sealing and microsurfacing) in Illinois. A review of the current state of knowledge and practice was conducted. The economic and logistic feasibility of using RAP in preserva ...
  • Stocktons Crosstown Freeway Urban Renewal and Asian Americans Systemic Causes and Impacts
    Stockton’s Crosstown Freeway, Urban Renewal, and Asian Americans: Systemic Causes and Impacts
    Ong, Paul M. ;
    Pech, Chhandara
    2023-10-01 | PDF
    This project uses mixed methods to examine the systemic causes and consequences of the construction of Stockton, California’s Crosstown Freeway and of urban redevelopment for Asian Americans communities. Stockton underwent spatial restructuring in the decades after the Second World War, and state and local government contributed and responded to th ...
  • Shear Friction Capacity of Corrugated Pipe Connection in Precast Footings Summary
    Shear Friction Capacity of Corrugated Pipe Connection in Precast Footings [Summary]
    Vasconcelos, Bruno ;
    Garber, David
    2023-10-01 | PDF
    Although new construction or replacement of bridges is many times in the best interest of the traveling public, high construction costs and potentially lengthy project delivery dates are hard to avoid. Using prefabricated bridge elements and systems (PBES) allows for reduced construction times and quicker turnaround times using Accelerated Bridge C ...
  • BioMaterial Maintenance Treatments
    Bio-Material Maintenance Treatments
    Williams, R Christopher ;
    Rodrigues, Ana Luiza
    2023-10-01 | PDF
    Asphalt pavements deteriorate from temperature cycling, moisture, oxidation, and loading-related distresses. Pavement preservation is critical in maintaining the functional and structural integrity of roads and extending pavement life. Surface treatments can prevent or restore the aging effects by rejuvenating and/or sealing the pavement’s surface, ...
  • Experimental Validation of Repair Methods for EarthquakeDamaged Bridges Incorporating ITDs Precast Pier System
    Experimental Validation of Repair Methods for Earthquake‐Damaged Bridges Incorporating ITD’s Precast Pier System
    Hogarth, Kathryn E ;
    Acharya, Mahesh
    2023-10-01 | PDF
    The use of Ultra‐High‐Performance Concrete (UHPC) is gaining popularity for bridge applications in North America. UHPC has been used both in the construction of new and retrofitting of existing bridges. In this research, a novel use of UHPC as a concrete jacket for retrofitting of plastic hinge zones in cast‐in‐place and precast piers is proposed. ...
  • 2023 Implementation Plan for the AASHTOWare Pavement ME Design Software
    2023 Implementation Plan for the AASHTOWare Pavement ME Design Software
    Von Quintus, Harold ;
    Sufian, Abu A
    2023-10-01 | PDF
    This report provides an updated implementation plan or Road Map for implementing the AASHTO Pavement ME Design (PMED) software for the Idaho Transportation Department (ITD). The initial Road Map to implement the PMED software was published in 2014. This document is an update and continuation of ITD’s plan based on the completed activities between 2 ...
  • Estimating Soil Pressure Against Unyielding Surfaces Summary
    Estimating Soil Pressure Against Unyielding Surfaces [Summary]
    Herrera, Rodrigo ;
    Rodgers, Michael
    2023-10-01 | PDF
    The objectives of this research were to construct a full-scale MSE wall with an unyielding condition and measure the resulting internal earth pressures. In particular, the goal of the project was to determine whether design should be conducted under assumed at-rest conditions, or somewhere between at-rest and passive pressure.
  • Synthesis Study Quantifying the Effect of UHPC Fiber Dispersion and Orientation in Structural Members Summary
    Synthesis Study Quantifying the Effect of UHPC Fiber Dispersion and Orientation in Structural Members [Summary]
    Freeman, Christina ;
    Zhang, Qian
    2023-10-01 | PDF
    The objectives of this research were to synthesize decades of research and practicum surrounding fiber orientation factors for UHPC and analyze the rationale behind the standards set for UHPC design by several countries that have implemented guidelines for its use.
  • Pathways to Autonomy Supporting Youth Independent Mobility in Westlake Los Angeles
    Pathways to Autonomy: Supporting Youth Independent Mobility in Westlake, Los Angeles
    Nelischer, Claire ;
    Cuff, Dana
    2023-10-01 | PDF
    In this study, we use the concept of “sidewalk ecologies” to highlight the complex interaction between spatially situated social and material features of sidewalks that influence youth mobility. We use a range of interdisciplinary strategies, emphasizing youth-centered research methods and mapping to capture a rich portrait of the independent trave ...
  • Assessing the Impact of Chloride Deicer Application in the Siskiyou Pass, Southern Oregon [Supporting Dataset]
    Stonewall, Adam J
    2023-09-30 | ZIP
    Chloride deicers have been applied by the Oregon Department of Transportation (ODOT) to Interstate Route 5 (I–5) from the Oregon-California border north to mile marker 10 for several years in the high-elevation area known as the Siskiyou Pass. Magnesium chloride (MgCl2) and sodium chloride (NaCl) are applied to keep the interstate highway safe for ...
    Dataset
  • Effective PedestrianNonMotorized Crossing Enhancements Along Higher Speed Corridors
    Effective Pedestrian/Non-Motorized Crossing Enhancements Along Higher Speed Corridors
    Houten, Ron Van ;
    Kwigizile, Valerian
    2023-09-30 | PDF
    The purpose of this research was to examine crashes along higher speed roads (speed limit of 45 mph or more) excluding freeways, at signalized and unsignalized locations, determine predominant causes of these crashes, and to identify countermeasures for these crashes. Assessment of high crash corridors included an examination of the number of crash ...
  • Assessing the Effects of Chloride Deicer Applications on Groundwater near the Siskiyou Pass, Southwestern Oregon, July 2018–February 2021 [supporting dataset]
    Herrera, Nora B.
    ORCID ICON IMG
    2023-09-29 | ZIP
    The U.S. Geological Survey, in cooperation with the Oregon Department of Transportation (ODOT), evaluated the effects of cold-weather chloride deicers (road deicing chemicals) on groundwater quality, with a focus on chloride, near the Siskiyou Pass in southwestern Oregon. The study covered the period during July 2018 through February 2021. Between ...
    Dataset
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