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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 3241 - 3260 of 36151 results
  • Evaluation of the Retsch Technology Camsizer P4 To Assess the Shape of Crushed Particles Proposed to Be Added to Natural Sand Fine Aggregate Used in Portland Cement Concrete
    Evaluation of the Retsch Technology Camsizer P4 To Assess the Shape of Crushed Particles Proposed to Be Added to Natural Sand Fine Aggregate Used in Portland Cement Concrete
    Dawson, M. Robert
    2021-10-01 | PDF
    The goal of this study was to determine the angularity and roundness of particles for use in fine aggregate for Portland Concrete. To develop a new test method for evaluation of fine aggregate in Portland Cement concrete, an instrument called the “Camsizer P4” was used for fine-particle size and shape analyses. This instrument uses advanced image a ...
  • Data Analytics and Evaluation of the Gainesville Trapezium Connected Vehicle Signal Phasing and Timing SPaT Deployment Project
    Data Analytics and Evaluation of the Gainesville Trapezium Connected Vehicle Signal Phasing and Timing (SPaT) Deployment Project
    Banerjee, Tania ;
    Manjunatha, Pruthvi
    2021-10-01 | PDF
    The overall goal of this project was to evaluate the efficacy of dedicated short-range communications (DSRC) in improving efficiency and safety within a network of signalized intersections. In this report, we describe the data collection, processing, and analysis mechanisms for traffic state data collected from the Gainesville Trapezium, a set of h ...
  • Human Machine Interface for Connected Vehicle Requirements Development and Assessment
    Human Machine Interface for Connected Vehicle: Requirements, Development and Assessment
    Ahmed, Mohamed ;
    Gaweesh, Sherif
    2021-10-01 | PDF
    The Connected Vehicle Pilot project was deployed on Interstate 80 corridor in Wyoming with the goal of promoting safety and mobility for road users with a focus on commercial vehicles, Highway patrol, and winter maintenance vehicles. One of the key components of the Wyoming department of transportation (WYDOT) CV pilot is the Human Machine Interfac ...
  • SelfHeating Electrically Conductive Concrete Demonstration Project Tech Transfer Summary
    Self-Heating Electrically Conductive Concrete Demonstration Project [Tech Transfer Summary]
    Ceylan, Halil ;
    Kim, Sunghwan
    2021-10-01 | PDF
    The primary objective of this research was to construct, demonstrate, and monitor a full-scale field implementation of the largest-to-date operational, electrically conductive concrete (ECON) heated pavement system (HPS) using different electrode configurations. The goals of the project included the following: • Develop a cost-effective methodology ...
  • ReTightening the Large Anchor Bolts of Support Structures for Signs and Luminaires Phase II
    Re-Tightening the Large Anchor Bolts of Support Structures for Signs and Luminaires: Phase II
    Dietrich, Zachary ;
    Phares, Brent M.
    2021-10-01 | PDF
    The Minnesota Department of Transportation (MnDOT) funded two projects in an effort to mitigate anchor bolt connection loosening and develop improved pre-tensioning steps for its sign, luminaire, and traffic signal (SLTS) structures. The Phase I study proposed new pre-tensioning procedures, completed laboratory testing, did an in-depth literature r ...
  • Synthesis of Technical Requirements and Considerations for Automated Snowplow Route Optimization
    Synthesis of Technical Requirements and Considerations for Automated Snowplow Route Optimization
    Dowds, Jonathan ;
    Sullivan, James
    2021-10-01 | PDF
    DOTs and other transportation agencies are increasingly using automated methods for snowplow route optimization, which have been demonstrated to produce significant savings when they result in the implementation of new routes. However, many route optimization projects have fallen short of implementation due to technical/operational issues with the ...
  • SelfHeating Electrically Conductive Concrete Demonstration Project
    Self-Heating Electrically Conductive Concrete Demonstration Project
    Malakooti, Amir ;
    Sadati, Sajed
    2021-10-01 | PDF
    Many transportation agencies allocate significant time and resources each year to remove ice and snow from their paved surfaces to achieve a safe, accessible, and operational transportation network. An electrically conductive concrete (ECON) heated pavement system (HPS) has been shown to be a promising alternative to conventional snow removal opera ...
    Supporting Files
  • Young Driver Crashes in Louisiana Understanding the Contributing Factors to Decrease the Numbers
    Young Driver Crashes in Louisiana: Understanding the Contributing Factors to Decrease the Numbers
    Mitran, Elisabeta ;
    Sun, Xiaoduan
    2021-10-01 | PDF
    Despite the early adoption of Graduated Driver Licensing (GDL) program, teens and young adults in Louisiana continued to experience crashes at higher rates and thereby considered as high-risk drivers. The aim of this study was to analyze young driver crash contributing factors and evaluate the Louisiana’s GDL program. Based on a comprehensive liter ...
  • DesignBuild Evaluation for General Aviation Hangars in Missouri
    Design-Build Evaluation for General Aviation Hangars in Missouri
    Goldstein, Glenn ;
    Hoffman, Richard
    2021-10-01 | PDF
    Design-build project delivery has been embraced across several states and local agencies for large and small public transportation projects. This delivery method has also been used extensively in the construction of privately owned and operated hangars to accelerate schedule and reduce construction cost. The State of Missouri launched this research ...
  • Connected Vehicle Safety Applications Using V2X Under Consideration of Bicycles Pedestrians and Persons With Special Needs
    Connected Vehicle Safety Applications Using V2X Under Consideration of Bicycles, Pedestrians and Persons With Special Needs
    Baqer, Mohammad ;
    Krings, Axel
    2021-10-01 | PDF
    In the context of connected vehicles, the focus of safety applications has mainly been on accident avoidance of motor vehicles, and little attention has been given to the safety of other traffic participants like bicycles, wheelchair operators, or visually impaired persons. This research first presents a bicycle safety application for connected veh ...
  • Measuring the Rates of WeightMile Tax Evasion in Oregon
    Measuring the Rates of Weight-Mile Tax Evasion in Oregon
    Martin, Andrew ;
    Koo, Jeeyen
    2021-10-01 | PDF
    In this report, three methods were selected to estimate WMT evasion rates for 2016-2018: 1) comparison of commercial truck screening data to WMT tax returns, 2) comparison of IRP registration filings to WMT tax returns, and 3) comparison of IFTA filings to WMT tax returns. Comparison of taxable miles calculated using commercial truck screening data ...
  • The Evolving Texas Megaregion Developing a Sustainable Megaregion Mobility Planning Blueprint
    The Evolving Texas Megaregion: Developing a Sustainable Megaregion Mobility Planning Blueprint
    Loftus-Otway, Lisa ;
    Bashar, Samira Binte
    2021-10-01 | PDF
    With the megaregional trend growing in the U.S., it is becoming increasingly important to recognize and reorient the scale of the mobility planning towards the megaregions for sustainable and equitable growth of regions. In 2013, European Union developed a new transportation planning process called Sustainable Urban Mobility Planning (SUMP). The ra ...
  • Load Rating of Existing Continuous Stringers on Louisianas Bridges
    Load Rating of Existing Continuous Stringers on Louisiana’s Bridges
    Sun, C. Shawn ;
    Linzell, Daniel G.
    2021-10-01 | PDF
    Some of Louisiana’s bridges built in the 1950s and 1960s used two-girder or truss systems, in which floor beams are carried by main members and continuous (spliced) stringers are supported by the floor beams. The main members are either two edge (fascia) girders or trusses. Stringer bottom flanges are in compression at the negative moment region, w ...
  • MASH Test 311 on FShape Portable Concrete Barrier With XBolt Connection
    MASH Test 3–11 on F-Shape Portable Concrete Barrier With X-Bolt Connection
    Bligh, Roger P. ;
    Menges, Wanda L.
    2021-10-01 | PDF
    An implementation agreement was adopted by the American Association of State Highway and Transportation Officials (AASHTO) and the Federal Highway Administration that coincided with the publication of the second edition of the AASHTO Manual for Assessing Safety Hardware (MASH). Subsequently, numerous roadside safety devices have been crash tested t ...
  • LifeCycle Impact Assessment of Recycled Pavement Projects in Virginia
    Life-Cycle Impact Assessment of Recycled Pavement Projects in Virginia
    Amarh, Eugene A ;
    Katicha, Samer W
    2021-10-01 | PDF
    This report describes a study conducted to evaluate the performance and quantify the potential environmental benefits of recycled asphalt pavement projects completed in Virginia. The performance of the recycled projects was assessed by evaluating collected stiffness data and by the development of performance prediction models based on data obtained ...
  • Development of RiskBased Protocol for KDOT Construction Inspection
    Development of Risk-Based Protocol for KDOT Construction Inspection
    Tran, Dan ;
    Mohamed, Mamdouh
    2021-10-01 | PDF
    State Departments of Transportation (DOTs) have been facing a challenge of shrinking budgets and substantial reductions in both the numbers and experience levels of inspectors over the last decade. Many state DOTs, including the Kansas Department of Transportation (KDOT), have lost experienced construction inspection staff while the numbers of proj ...
  • Determination of Fatigue Resistance of Coupler Connections in Aluminum Overhead Truss Structures
    Determination of Fatigue Resistance of Coupler Connections in Aluminum Overhead Truss Structures
    Yu, Danqing ;
    Bennett, Caroline
    2021-10-01 | PDF
    Overhead truss sign structures (OHTSS) are widely used over highways across the nation. An overhead truss sign structure is comprised of a truss and two supporting frames at each end, and can be made using aluminum or steel. Aluminum overhead truss sign structures are generally more prone to vibration issues due to their light weight (Fouad et al. ...
  • Achieving Excellence for Californias Freight System Developing Competitiveness and Performance Metrics Incorporating Sustainability Resilience and Workforce Development
    Achieving Excellence for California’s Freight System: Developing Competitiveness and Performance Metrics Incorporating Sustainability, Resilience, and Workforce Development
    Ke, Jian-yu ;
    Prager, Fynnwin
    2021-10-01 | PDF
    This study explores the question of whether California's freight system is staying competitive with other US regions. A novel analytical framework compares supply chain performance metrics across multiple US states and regions for seaports, airports, highways, freight rail service, and distribution centers by combining the Performance Evaluation Ma ...
  • Methods for Evaluation of the Remaining Shear Capacity in Steel Bridge Beams With Section Losses Attributable to Corrosion Damage
    Methods for Evaluation of the Remaining Shear Capacity in Steel Bridge Beams With Section Losses Attributable to Corrosion Damage
    Javier III, Eulogio M ;
    Hebdon, Matthew H
    2021-10-01 | PDF
    Steel bridges commonly have corrosion at beam ends because of leaking joints, which provide a pathway for de-icing salts to fall onto the beams from the roadway above. Once beam ends have corrosion damage, it becomes more difficult to determine their remaining shear capacity to be used for load rating. This is because classical design equations are ...
  • Understanding Florida Motorcycle Crashes and Injury Outcomes Using the Motorcycle Crash Causation Study MCCS Dataset
    Understanding Florida Motorcycle Crashes and Injury Outcomes Using the Motorcycle Crash Causation Study (MCCS) Dataset
    Lee, Chanyoung ;
    Wang, Zhenyu
    2021-10-01 | PDF
    With the Motorcycle Crash Causation Study (MCCS) dataset mapped to the Florida crash database, an effort to obtain a complementary understanding and knowledge of characteristics related to locational, temporal, trip, motorcycle, injury, and contributing crash factors by most harmful event was conducted to lead to informed decision-making by the Flo ...
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