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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 6201 - 6220 of 36049 results
  • Developing Statewide SustainableCommunities Strategies Monitoring System for Jobs Housing and Commutes
    Developing Statewide Sustainable-Communities Strategies Monitoring System for Jobs, Housing, and Commutes
    Ong, Paul M. ;
    Pech, Chhandara
    2018-12-15 | PDF
    This project is the second phase of a larger effort aimed at developing a group of key indicators, referred to in this document as the Statewide Monitoring System, to track progress toward achieving certain SB 375 goals across California. One of the legislation's goals is to promote better coordination of land-use, housing, and transportation plann ...
  • A Multimodal Network Approach to the Inland and Coastal Waterway System
    A Multimodal Network Approach to the Inland and Coastal Waterway System
    Wang, Bruce ;
    Mahmoudzadeh, Ahmadreza
    2018-12-15 | PDF
    The inland waterway system carries a significant percentage of the national freight. Maintenance operations including dredging and dam repair are important to maintaining the effective and efficient operation of the system. Dredging projects are for recovery of the navigational channel draft from the shoaling effect while lock/dam repair is about m ...
  • Freeway Traffic Safety and Efficiency Enhancement Through Adaptive Roadway Lighting and Control Enabled by Connected Sensor and Infrastructure Networks
    Freeway Traffic Safety and Efficiency Enhancement Through Adaptive Roadway Lighting and Control Enabled by Connected Sensor and Infrastructure Networks
    Wang, Yinhai ;
    Henrickson, Kristian
    2018-12-15 | PDF
    Visibility of the roadway and roadside objects often decreases as light (from natural and artificial sources) diminishes under a certain level. Roadway lighting, when used appropriately for the given context and conditions, can be an effective means for increasing visibility; however, inappropriate lighting can lead to issues such as glare. Recentl ...
  • Assessment of the 40 Wide Paving Skid Box for Preventative Maintenance
    Assessment of the 40” Wide Paving Skid Box for Preventative Maintenance
    Anderson, Ian A.
    ORCID ICON IMG
    2018-12-13 | PDF
    VTrans has typically employed common preventative maintenance treatments (PMTs) such as bituminous crack fill sealant, chip seal, micro-surfacing, slurry seal, cape seal, fog seal, paver placed surface seal, ultra-thin bituminous overlay, cold milling and bituminous overlays, and hot-in-place bituminous overlays. These treatments have proven to be ...
  • Augmented Reality for Safer Pedestrian-Vehicle Interactions [supporting datasets]
    Noyce, David A. ;
    Nassereddine, Hiba
    2018-12-13 | ZIP
    Communicating the presence of pedestrians or bicyclists to vehicle drivers can lead to safer interactions with these vulnerable road users. Advanced knowledge about the presence of these users on the roadway is particularly important when their presence is not expected or when these users are out of range of the advanced safety systems that are bec ...
    Dataset
  • Assessment of SuperSlab a Precast Concrete Bridge Approach Slab
    Assessment of Super-Slab, a Precast Concrete Bridge Approach Slab
    Anderson, Ian A.
    ORCID ICON IMG
    2018-12-13 | PDF
    With a growing amount of highway infrastructure in need of reconstruction or rehabilitation and ever-increasing construction costs, State Agencies are seeking cost effective methods of increasing the service life of infrastructure and reducing construction times. Prefabricated elements and systems, such as deck panels and stay in place forms, have ...
  • Pavement Marking Comparison Study I89 Liquid Markings
    Pavement Marking Comparison Study – I-89 Liquid Markings
    Anderson, Ian A.
    ORCID ICON IMG
    2018-12-04 | PDF
    Pavement markings provide an important means of communication for all roadway users and must be capable of conveying information during inclement weather and evening hours when there may be little to no contribution from overhead lighting. The following report outlines the observations relating to five different liquid binder packages, two optic ca ...
  • Updating and Implementing the Grade Severity Rating System GSRS for Wyoming Mountain Passes Volume 1
    Updating and Implementing the Grade Severity Rating System (GSRS) for Wyoming Mountain Passes [Volume 1]
    Moomen, Milhan ;
    Apronti, Dick T.
    2018-12-01 | PDF
    The State of Wyoming like other western States is characterized by steep downgrades on mountainous highways. Such difficult terrain presents considerable crash risks to truck drivers inexperienced or unfamiliar with the landscape. Truck crashes on Wyoming mountain passes have been a cause for concern due to their devastating effect on lives and pro ...
  • Development of High EarlyStrength Concrete for Accelerated Bridge Construction Closure Pour Connections
    Development of High Early-Strength Concrete for Accelerated Bridge Construction Closure Pour Connections
    Breña, Sergio F ;
    Civjan, Scott A
    2018-12-01 | PDF
    Accelerated bridge construction (ABC) has become a popular alternative to using traditional construction techniques in new bridge construction and existing bridge deck replacement because of the reduction of time spent in field activities. A key feature of bridges built using ABC techniques is the extensive use of prefabricated components. Prefabri ...
  • Vehicle Sensor Data VSDBased Traffic Control in Connected Automated Vehicle CAV Environment
    Vehicle Sensor Data (VSD)-Based Traffic Control in Connected Automated Vehicle (CAV) Environment
    Yang, Xianfeng (Terry) ;
    Zhang, Zhehao
    2018-12-01 | PDF
    Connected automated vehicles (CAVs) are typically equipped with communication devices (e.g., dedicated short range communication) and on-board sensors (e.g., Radar, Lidar, Camera, etc.). Also, it can be expected that CAVs and human-driven vehicles (HVs) will co-exist on the transportation network in a long period. Hence, to support various traffic ...
  • Development of New Design Guidelines for Protection Against Erosion at Bridge Abutments and EmbankmentsPhase I
    Development of New Design Guidelines for Protection Against Erosion at Bridge Abutments and Embankments-Phase I
    Constantinescu, George
    ORCID ICON IMG
    2018-12-01 | PDF
    Over the last two decades, the United States Midwest has experienced increasingly catastrophic flood events. Severe erosion problems occurred even though the erosion protection design measures for bridge abutments and their embankments followed the existing guidelines (e.g., HEC 23, 2001 and following updates through 2009). The methodology proposed ...
  • Characterization and Performance of ZeroCement Concrete
    Characterization and Performance of Zero-Cement Concrete
    Gomaa, Eslam ;
    Sargon, Simon
    2018-12-01 | PDF
    This study has investigated the feasibility of using five different types of class C fly ashes (FAs) sourced from Labadie, Jeffrey, Kansas City, Thomas Hill, and Sikeston power plants in the state of Missouri to synthesize zero-cement concrete (ZCC) for different structural and repair applications. Alkali activator (Alk) consisting of sodium silica ...
  • Use of Deep Learning to Predict Daily Usage of Bike Sharing Systems
    Use of Deep Learning to Predict Daily Usage of Bike Sharing Systems
    Yang, Hong ;
    Xie, Kun
    2018-12-01 | PDF
    Bike sharing systems are increasingly deployed in many cities worldwide. These systems provide a prominent solution for the first/last-mile problem with their cost-effectiveness and eco-friendliness. However, the use of bikes among stations is often spatiotemporally imbalanced, causing many problems in daily operations (e.g., rebalancing challenges ...
  • Validation Study for Detection and Quantification of Corrosion in Bridge Barrier Rails
    Validation Study for Detection and Quantification of Corrosion in Bridge Barrier Rails
    Eisenmann, David ;
    Margetan, Frank
    2018-12-01 | PDF
    The use of nondestructive evaluation (NDE) to evaluate the structural worthiness of civil structures was continued in this Phase II research project. This aim of the project was to validate the use of two NDE methodologies, ground penetrating radar (GPR) and magnetic flux leakage (MFL), to detect material loss in reinforcing steel of a barrier rail ...
  • Integrated Traffic Flow Control in a Connected Network Brief
    Integrated Traffic Flow Control in a Connected Network [Brief]
    Ioannou, Petros
    ORCID ICON IMG
    2018-12-01 | PDF
    Highway congestion due to incidents and bottlenecks is a frequent phenomenon in most Urban highways. Understanding the mechanisms of congestion and finding ways to better control traffic flow in order to prevent or better manage congestion will have a significant impact on travel times, fuel savings and emissions. The project objectives are to desi ...
  • Young Driver Crash Rates and Iowas Passenger Restriction Waiver
    Young Driver Crash Rates and Iowa’s Passenger Restriction Waiver
    Reyes, Michelle L. ;
    Kim, Sang Hee Nina
    2018-12-01 | PDF
    Iowa is the only state in the US that gives parents the option to implement or waive a passenger restriction that limits the number of unrelated minor passengers to one for the first six months of licensure. The restriction does not apply to a driver’s sibling, step‐sibling, or a child who resides at the same household as the driver. The Iowa DOT i ...
  • Thermal Integrity Profiling for Detecting Flaws in Drilled Shafts Final Report
    Thermal Integrity Profiling for Detecting Flaws in Drilled Shafts [Final Report]
    Boeckmann, Andrew Z. ;
    Loehr, J. Erik
    2018-12-01 | PDF
    Thermal Integrity Profiling (TIP) methods for evaluating drilled shaft concrete integrity have emerged in recent years as a viable alternative to Crosshole Sonic Logging (CSL) methods. TIP methods use measurements of concrete temperatures along the length of the drilled shaft reinforcing cage to identify potential defect locations from zones of low ...
  • Quantifying the Range of Variability in the Flexural Strength of Fiber Reinforced Concrete Using Monte Carlo Simulation
    Quantifying the Range of Variability in the Flexural Strength of Fiber Reinforced Concrete Using Monte Carlo Simulation
    Ghadban, Ahmad A. ;
    Wehbe, Nadim I.
    2018-12-01 | PDF
    Many laboratory studies have shown erratic results in flexural strength among replicate specimens of Fiber reinforced concrete (FRC). As a result, repeatability of results was very challenging. Given this issue, it would be very difficult for design engineers to make reliable claims about the performance of a certain FRC element in the field. The o ...
  • GDOT Roadmap for Driverless Vehicles
    GDOT Roadmap for Driverless Vehicles
    Hunter, Michael ;
    Kingsley, Gordon
    2018-12-01 | PDF
    This study develops a technology roadmap of the development of driverless vehicles, exploring the likely impacts for the transportation systems of the state of Georgia and the operations of the Georgia Department of Transportation (GDOT). The roadmap consists of two elements. First, a range of contingencies shaping the development pathways for auto ...
  • Green Generates Green
    Green Generates Green
    Khattak, Asad ;
    Noltenius, Melany
    2018-12-01 | PDF
    This project reflects a collaboration between Tennessee Department of Transportation (TDOT) and project team members from the University of Tennessee aiming to understand and improve Tennessee’s transportation system sustainability and design a plan of action. The project team members started by using results from text analytics to determine sustai ...
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