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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 981 - 1000 of 35448 results
  • Evaluation of Ramp Metering Effectiveness Along the I35 Corridor in the Kansas City Metropolitan Area
    Evaluation of Ramp Metering Effectiveness Along the I-35 Corridor in the Kansas City Metropolitan Area
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2024-05-01 | PDF
    This research investigated the safety and operational benefits of ramp metering along the I-35 corridor in the Kansas City metropolitan area. A before-and-after study was conducted to compare selected performance measures, with a “before” period from August 2015 to December 2015 and an “after” period from October 2021 to February 2022. The research ...
  • Evaluation of Ramp Metering Effectiveness Along the I35 Corridor in the Kansas City Metropolitan Area Technical Summary
    Evaluation of Ramp Metering Effectiveness Along the I-35 Corridor in the Kansas City Metropolitan Area [Technical Summary]
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2024-05-01 | PDF
    This research investigated the safety and operational benefits of ramp metering along the I-35 corridor in the Kansas City metropolitan area. A before-and-after study was conducted to compare selected performance measures, with a “before” period from August 2015 to December 2015 and an “after” period from October 2021 to February 2022. The research ...
  • Assessment of the Impact of Unacceptable HotMix Asphalt Test Parameters
    Assessment of the Impact of Unacceptable Hot-Mix Asphalt Test Parameters
    Hajj, Ramez ;
    Lu, Yujia
    2024-05-01 | PDF
    According to the current standard specifications and special provisions within the Illinois Department of Transportation, four quality assurance (QA) parameters are used to assess acceptability to remain in place for hot-mix asphalt (HMA) construction projects. However, when these parameters fall outside acceptable limits, it is not clear what impa ...
  • Performance and Design of Continuously Reinforced Concrete Pavements
    Performance and Design of Continuously Reinforced Concrete Pavements
    Sakulneya, Apidej ;
    Anderson, Connor
    2024-05-01 | PDF
    This report focuses on the calibration of a design framework for continuously reinforced concrete pavement (CRCP) developed in 2009 by using the most recent performance data acquired from existing CRCP sections in Illinois. Field performance data were used to update the fatigue damage to punchout model coefficients in the design framework. A sensit ...
  • Implementation and Monitoring of a NonProprietary UltraHigh Performance Concrete Bridge Deck Overlay
    Implementation and Monitoring of a Non-Proprietary Ultra-High Performance Concrete Bridge Deck Overlay
    Alvarez, Andres ;
    Weldon, Brad D.
    2024-05-01 | PDF
    Concrete bridge decks frequently experience deterioration caused by heavy traffic loads and harsh environmental conditions. New and more effective methods of repair are required to ensure that concrete bridge decks continue to perform adequately. Bridge deck overlays are a popular deck repair strategy as they increase cover for the deck reinforcing ...
  • Benefit Analysis of Barrier Inlet Screens
    Benefit Analysis of Barrier Inlet Screens
    Kerns, Justin ;
    Grimm, Alec
    2024-05-01 | PDF
    The Benefit Analysis of Barrier Inlet Screens research project studied the effectiveness of screening devices at preventing debris from entering stormwater inlets along highway barrier walls. This research was focused on large trash and debris, as opposed to sediment and dissolved solids. A variety of proprietary and non-proprietary screen devices ...
  • Benefit Analysis of Barrier Inlet Screens Fact Sheet
    Benefit Analysis of Barrier Inlet Screens [Fact Sheet]
    Kerns, Justin ;
    Winston, Ryan J
    2024-05-01 | PDF
    A wide range of debris from fine sediments to hubcaps and tires can enter ODOT roadside drainage inlets, disrupting the hydraulic capacity of sewer systems. This often leads to increased stormwater spread and ponding on roadways – a danger to motorists. Barrier inlets are particularly vulnerable to these issues given their minimal separation from t ...
  • Recruiting and Retaining Staff Fact Sheet
    Recruiting and Retaining Staff [Fact Sheet]
    Balyagati, Philip ;
    Ngereza, Abdul
    2024-05-01 | PDF
    The Ohio Department of Transportation (ODOT) has been challenged to address a shortage of staff due to staff turnover, less hiring of full-time staff and increasing technological capabilities all of which have been exacerbated by the retirement of the baby-boomer generation from the workforce. It is imperative that ODOT explore and implement innova ...
  • Recruiting and Retaining Staff
    Recruiting and Retaining Staff
    Balyagati, Philip ;
    Ngereza, Abdul
    2024-05-01 | PDF
    The Ohio Department of Transportation (ODOT) has been challenged to address a shortage of staff due to staff turnover, less hiring of full-time staff, and increasing technological capabilities all of which have been exacerbated by the retirement of the baby-boomer generation from the workforce. It is imperative that ODOT explore and implement innov ...
  • Leveraging Abandoned Railroad Tunnels for Bat Conservation
    Leveraging Abandoned Railroad Tunnels for Bat Conservation
    Johnson, Joseph S ;
    Kuchta, Shawn R
    2024-05-01 | PDF
    This report summarizes a study on abandoned tunnels' importance to bat populations in Ohio. We located 50 tunnels and surveyed 40 of these for one or more winter season. Little brown myotis, big brown bats, and tricolored bats were the most commonly observed species, with varying preferences for tunnel features. Key predictors of bat use such as tu ...
  • Leveraging Abandoned Railroad Tunnels for Bat Conservation Fact Sheet
    Leveraging Abandoned Railroad Tunnels for Bat Conservation [Fact Sheet]
    Johnson, Joseph S ;
    Kuchta, Shawn R
    2024-05-01 | PDF
    This report summarizes a study on abandoned tunnels' importance to bat populations in Ohio. We located 50 tunnels and surveyed 40 of these for one or more winter season. Little brown myotis, big brown bats, and tricolored bats were the most commonly observed species, with varying preferences for tunnel features. Key predictors of bat use such as tu ...
  • Developing Performance Specifications for HighPerformance Concrete Project Summary
    Developing Performance Specifications for High-Performance Concrete [Project Summary]
    Mukhopadhyay, Anol ;
    Saraswatula, Pravin
    2024-04-30 | PDF
    The main objective of this project was to develop HPC performance specifications to ensure adequate durability performance matching with exposure conditions.
  • Development of CostEffective RapidSetting Concrete for Improved Bridge Joint Performance
    Development of Cost-Effective Rapid-Setting Concrete for Improved Bridge Joint Performance
    Dave, Eshan V. ;
    Sias, Jo E
    2024-04-17 | PDF
    Vermont Agency of Transportation has adopted use of the accelerated bridge construction (ABC) approach to deliver bridge construction and reconstruction projects. While ABC projects enjoy high material quality due to a large fraction of precast and prefabricated elements, connections between these elements must be placed in-situ. These are often tr ...
  • Developing a Lower Modulus Polymer Resin Binder Systems Specifications for High Friction Surface Treatment HFST on Asphalt Pavements in Nevada
    Developing a Lower Modulus Polymer Resin Binder Systems Specifications for High Friction Surface Treatment (HFST) on Asphalt Pavements in Nevada
    Shah, Ayesha ;
    Youngblood, Jeffrey P
    2024-04-09 | PDF
    A variety of physical property measurements were performed including Dynamic Scanning Calorimetry (DSC), Dynamic Mechanical Analysis (DMA), compression testing, tensile testing, heat deflection temperature (HDT) testing, and Coefficient of Thermal Expansion (CTE) testing. Results showed a wide range of properties of the resins. Lab scale applicatio ...
  • Study on Spectrum Options for GDOTs Connected Vehicle Infrastructure
    Study on Spectrum Options for GDOT’s Connected Vehicle Infrastructure
    Kim, Seungmo
    2024-04-01 | PDF
    Vehicle-to-everything (V2X) communications are expected to take a critical role in a variety of transportation safety applications in connected and autonomous vehicle environment. However, Dedicated Short-Range Communications (DSRC), one of the representative technologies implementing the V2X communications, is encountering challenges due to the re ...
  • A DataDriven Analysis of Transportation Infrastructure Equity in Utah
    A Data-Driven Analysis of Transportation Infrastructure Equity in Utah
    Burbidge, Shaunna K. ;
    Gee, Collin
    2024-04-01 | PDF
    Transportation investments vary across geographic areas. Currently, there is no mechanism in place to ensure that those investments are equitable. This project examined transportation investments and infrastructure quality (e.g., pavement conditions, presence of bike lanes, transit access, speed limits, etc.) in urban and rural Utah and correlated ...
  • OSTR Research Roundup Newsletter April 2024
    OST-R Research Roundup Newsletter: April 2024
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2024-04-01 | OST-R Research Roundup | PDF
    News from across OST-R and its research community.
  • NJDOT Compensation Scan and Retention Study
    NJDOT Compensation Scan and Retention Study
    Gaines, Danena ;
    Kurlander, Victoria
    2024-04-01 | PDF
    With noticeable staff turnover in certain employment classifications, NJDOT engaged Cambridge Systematics (CS) to conduct the Compensation Scan and Retention Study. This scope of work is focused on researching and collecting information on compensation and retention of employees utilized by municipalities and county transportation agencies, private ...
  • NJDOT Compensation Scan and Retention Study Technical Summary
    NJDOT Compensation Scan and Retention Study [Technical Summary]
    Gaines, Danena
    2024-04-01 | PDF
    With noticeable staff turnover in certain employment classifications, NJDOT engaged Cambridge Systematics (CS) to conduct the Compensation Scan and Retention Study. This scope of work is focused on researching and collecting information on compensation and retention of employees utilized by municipalities and county transportation agencies, private ...
  • Improving Roadway Debris Clearance for CHART Responders Research Summary
    Improving Roadway Debris Clearance for CHART Responders: Research Summary
    Yang, Xianfeng
    2024-04-01 | PDF
    This project intends to investigate the feasibility of deploying LaneBlade® on CHART vehicles under various environmental conditions such as low visibility conditions, etc., as well as the effectiveness of LaneBlade® in reducing debris clearance time in various scenarios where its deployment is feasible.
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