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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 2561 - 2580 of 36114 results
  • Female Crash Fatality Risk Relative to Males for Similar Physical Impacts
    Female Crash Fatality Risk Relative to Males for Similar Physical Impacts
    Noh, Eun Young ;
    Atwood, Jonathan Richard Edward
    2022-08-01 | National Transportation Statistics (NTS) | PDF
    A previous NHTSA study in 2013 reported that females have a higher estimated fatality risk than males in comparable crashes (i.e., from similar physical impacts) as front row occupants when the full history of all fatal crashes are considered. This report updates NHTSA’s previous analysis to examine the effect of sex on driver-side or right-front p ...
  • 3D StrutandTie Modeling for Design of Drilled Shaft Footings Under Biaxial Eccentric Loading
    3D Strut-and-Tie Modeling for Design of Drilled Shaft Footings Under Biaxial Eccentric Loading
    Yi, Yousun ;
    Hyunsu, Kim
    2022-08-01 | PDF
    This project establishes a series of design guidelines for drilled shaft footings subjected to biaxial eccentric loading by refining the design recommendations of TxDOT Project 0-6953. The refined guidelines include the single strut– and single tie–based equivalent force system, development of 3D strut-and-tie models for biaxial eccentric loading s ...
  • Impacts of Intersection Treatments and Traffic Characteristics on Bicyclist Safety
    Impacts of Intersection Treatments and Traffic Characteristics on Bicyclist Safety
    Russo, Brendan ;
    Hurwitz, David S.
    2022-08-01 | PDF
    This study assessed the safety impact and performance of three different bicycle-specific intersection treatments (bike boxes, mixing zones, and bicycle signals) using surrogate safety measures (i.e., bicycle-vehicle conflicts and other non-crash measures). To date, limited research had been conducted to analyze how these treatments along with traf ...
  • KRS and KAR Review of Models as a Legal Contract Document
    KRS and KAR Review of Models as a Legal Contract Document
    Gibson, Bryan ;
    Clay-Young, Pam
    2022-08-01 | PDF
    State departments of transportation (DOTs) are expanding the use of electronic engineering data (EED) throughout highway projects — from design and construction through asset management. Included under the umbrella of EED are technologies such as building information modelling (BIM), digital terrain models (DTMs), and 3D models and plan sets. The K ...
  • Can Rebates Foster Equity in Congestion Pricing Programs
    Can Rebates Foster Equity in Congestion Pricing Programs?
    Sallee, James M ;
    Tarduno, Matthew A
    2022-08-01 | PDF
    Congestion pricing improves economic efficiency, but it may lead to inequitable outcomes. A key policy priority in California is identifying ways to avoid the hardship of congestion pricing on low income or other vulnerable populations. This study uses data from a congestion pricing experiment in the Seattle metro area to examine the feasibility of ...
  • Assessment of Transportation Systems Resilience for Vulnerable Communities and Populations
    Assessment of Transportation Systems Resilience for Vulnerable Communities and Populations
    Carver, Jennifer Z ;
    Abdelrazig, Yassir
    2022-08-01 | PDF
    Florida Department of Transportation identified resilience as a critical priority in its Florida Transportation Plan (FTP). Resilient transportation systems are assets that can withstand disruptions, adapt to changing conditions, perform effectively, and recover rapidly. Historically, disruptions from natural hazards are more consequential, with mo ...
  • TELEcommuting during the COVID19 Pandemic and Beyond Unveiling Statewide Patterns and Trends of Telecommuting in Relation to Transportation Employment Land Use and Emissions in California Summary
    “TELE-commuting” during the COVID-19 Pandemic and Beyond: Unveiling State-wide Patterns and Trends of Telecommuting in Relation to Transportation, Employment, Land Use, and Emissions in California [Summary]
    Lu, Tianjun ;
    Ke, Jian-yu
    2022-08-01 | PDF
    Telecommuting, which enables employees to perform job tasks remotely at home, increased significantly (25% to 35%) early in the COVID-19 pandemic. This shift represented a major societal change that reshaped the family, work, and social lives of many Californians, also raising important questions about what factors influenced telecommuting before, ...
  • Development of a Strategy To Address LoadPosted Bridges Through Reduction in Uncertainty in Load RatingsVolume 2 Load Testing and Modeling for Refined Load Rating
    Development of a Strategy To Address Load-Posted Bridges Through Reduction in Uncertainty in Load Ratings—Volume 2: Load Testing and Modeling for Refined Load Rating
    Hueste, Mary Beth ;
    Hurlebaus, Stefan
    2022-08-01 | PDF
    Maintaining the functionality of the transportation infrastructure depends on the successful management of aging bridge assets. Departments of transportation rely on the load rating process to evaluate the sufficiency of the bridge structures in their state, and they post load restrictions if the capacity of a bridge does not meet the maximum load ...
  • Performance of Asphalt Rubber GapGraded Mixture Overlays Over Jointed Concrete Pavements
    Performance of Asphalt Rubber Gap-Graded Mixture Overlays Over Jointed Concrete Pavements
    Nair, Harikrishnan ;
    Hossain, Shabbir
    2022-08-01 | PDF
    The Virginia Department of Transportation (VDOT) maintains 3,343 lane-miles of composite pavements (asphalt over jointed concrete or continuously reinforced concrete pavements). Propagation of cracks from existing pavements into new asphalt concrete overlays (reflective cracking) is a major problem with composite pavements. Treatments that are used ...
  • TELEcommuting During the COVID19 Pandemic and Beyond Unveiling Statewide Patterns and Trends of Telecommuting in Relation to Transportation Employment Land Use and Emissions in California
    “TELE-commuting” During the COVID-19 Pandemic and Beyond: Unveiling State-wide Patterns and Trends of Telecommuting in Relation to Transportation, Employment, Land Use, and Emissions in California
    Lu, Tianjun ;
    Ke, Jian-yu
    2022-08-01 | PDF
    Telecommuting, the practice of working remotely at home, increased significantly (25% to 35%) early in the COVID-19 pandemic. This shift represented a major societal change that reshaped the family, work, and social lives of many Californians. These changes also raise important questions about what factors influenced telecommuting before, during, a ...
  • Internet of Things IoT and Remote Sensing RS Based on Geospatial Information System GIS Against Fatigue of Asphalt Bitumen
    Internet of Things (IoT) and Remote Sensing (RS) Based on Geospatial Information System (GIS) Against Fatigue of Asphalt Bitumen
    Bhattarai, Shova R ;
    Feizbahr, Mahdi
    2022-08-01 | PDF
    This work investigated the Geospatial Information System (GIS) as a low-cost, high-precision, and rapid method for identifying the (RAP). This work also showed that (GIS) can be linked to new techniques including Remote Sensing (RS) and the Internet of Things (IoT) which can be serious subjects for research in the field of pavement engineering. The ...
  • Development of GFRP Reinforced Single Slope Bridge Rail
    Development of GFRP Reinforced Single Slope Bridge Rail
    Consolazio, Gary ;
    Hamilton, H. R.
    2022-08-01 | PDF
    In the design of highway bridges in Florida, glass fiber reinforced polymer (GFRP) materials are starting to replace mild carbon steel as the basis for reinforcing structural concrete components. Whereas traditional steel rebar is susceptible to corrosion, GFRP rebar is not, and therefore the use of GFRP has the potential to reduce maintenance cost ...
  • Recommendations for Nondestructive Testing NDT of Concrete Components for PerformanceBased Specifications
    Recommendations for Nondestructive Testing (NDT) of Concrete Components for Performance-Based Specifications
    Jacobs, Laurence J. ;
    Kurtis, Kimberly E
    2022-08-01 | PDF
    This research investigates non-destructive testing (NDT) techniques for the quality assurance of portland cement concrete pavements and structures. Responses were collected from a survey distributed amongst AASHTO Committee of Materials and Pavements (CoMP) members regarding their use of NDT technologies. Relevant literature was reviewed to determi ...
  • Simulating Life with PersonallyOwned Autonomous Vehicles through a Naturalistic Experiment with Personal Drivers
    Simulating Life with Personally-Owned Autonomous Vehicles through a Naturalistic Experiment with Personal Drivers
    Harb, Mustapha ;
    Malik, Jai
    2022-08-01 | PDF
    Forty-three households in the Sacramento region representing diverse demographics, modal preferences, mobility barriers, and weekly vehicle miles traveled (VMT) were provided personal chauffeurs for one or two weeks to simulate travel behavior with a personally-owned, fully autonomous vehicle (AV). During the chauffeur week(s), the total number of ...
  • Developing Countermeasures to Decrease Pedestrian Deaths Guidebook
    Developing Countermeasures to Decrease Pedestrian Deaths: Guidebook
    Kockelman, Kara ;
    Perrine, Kenneth A.
    2022-08-01 | PDF
    This guidebook is designed to enable practitioners at all levels of government to select the most cost-effective pedestrian-safety treatments for a wide variety of Texas contexts and reverse the rise in pedestrian deaths on Texas roadways. It provides a framework for prioritizing problematic intersections and corridors, analyzing the impact of rele ...
    Supporting Files
  • Implementation Evaluating Bridge Behavior Using UltraHighResolution NextGeneration Digital Image Correlation DIC Applications in Bridge Inspection and Damage Assessment
    Implementation Evaluating Bridge Behavior Using Ultra-High-Resolution Next-Generation Digital Image Correlation (DIC): Applications in Bridge Inspection and Damage Assessment
    Rajae, Shima ;
    Ghorbani, Rasool
    2022-08-01 | PDF
    The Civil Infrastructure Vision (CIV) system is an integrated software/hardware system is based on principles of Digital Image Correlation (DIC) developed at UTSA for TxDOT. The system can be used to monitor surface deformations on bridges to accuracies on the order of 1/1,000th in. Project objectives included training DOT on using the system durin ...
  • Economic Impact of Access Management Treatments Research Project Capsule 224SS
    Economic Impact of Access Management Treatments: Research Project Capsule [22–4SS]
    Barnes, Stephen ;
    Rupnow, Tyson
    2022-08-01 | PDF
    The overall goal of this research is to assess the economic impact of access management techniques on businesses in the corridor where such projects have been implemented in Louisiana. A secondary goal is to assess the perception of businesses near completed projects. Specifically, the objectives are to (1) identify current state of knowledge about ...
  • Division of Engineering Research OnCall Services 20202023 Task 5 Detention Basin Water Quality Outlet Redesign
    Division of Engineering Research On-Call Services 2020-2023 Task 5: Detention Basin Water Quality Outlet Redesign
    McCabe, Mark ;
    White, Kevin
    2022-08-01 | PDF
    The Ohio Department of Transportation is interested in evaluating and assessing options related to the current detention basin design to collect information from peer DOTs on design standards associated with detention basin details that include basin designs, outlet structures, low-flow channels, and emergency spillway. Based on AASHTO DOT response ...
  • Effectiveness of Speed Management Methods in Work Zones
    Effectiveness of Speed Management Methods in Work Zones
    Brown, Henry ;
    Edara, Praveen
    2022-08-01 | PDF
    Management of speeds is a significant component of any strategy to reduce work zone crashes. The objective of this study is to investigate the effectiveness of speed management countermeasures, such as speed display trailer, speed display trailer with red and blue lights, work vehicle with red and blue lights, and active and passive law enforcement ...
  • Field Test Bed for Evaluating Embedded Vehicle Sensors With Indiana Companies
    Field Test Bed for Evaluating Embedded Vehicle Sensors With Indiana Companies
    Habib, Ayman ;
    Bullock, Darcy M.
    2022-08-01 | PDF
    With the advent of modern sensing technology, mapping products have begun to achieve an unprecedented precision of measurement. Considering their diverse use cases, several factors play a role in what would make the resulting measurements accurate. For light detection and ranging (LiDAR) and photogrammetry-based mapping solutions that implement veh ...
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