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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 5461 - 5480 of 36958 results
  • Exploring WeatherRelated Connected Vehicle Applications for Improved Winter Travel in the Pacific Northwest
    Exploring Weather-Related Connected Vehicle Applications for Improved Winter Travel in the Pacific Northwest
    Shi, Xianming ;
    Wang, Yinhai
    2020-01-01 | PDF
    The objectives of this project were to investigate how connected vehicle (CV) data could be integrated with existing infrastructure data, and how the integrated data could be utilized to improve decision-making for highway operations and to enhance traveler information during inclement winter weather events. Because of some unforeseen difficulties, ...
  • Development of Rating Tool for Prestressed Concrete Bridges Vulnerable to Shear
    Development of Rating Tool for Prestressed Concrete Bridges Vulnerable to Shear
    Floyd, Royce ;
    Pei, Jin-Song
    2020-01-01 | PDF
    A study was conducted examining the factors affecting shear capacity and load rating, two potential methods for assessing condition of in-service prestressed concrete bridge girders, and a simple procedure for assessing whether and how a bridge should be rated for shear was developed. First, a detailed literature review was conducted to collect res ...
  • Compacted Concrete Pavement
    Compacted Concrete Pavement
    Khayat, Kamal H. ;
    Farzadnia, Nima
    2020-01-01 | PDF
    Due to the increasing budget constraints and decreasing time in pavement construction, there has been renewed interest in exploring the application of cost-effective and rapid pavement construction techniques. Roller-compacted concrete (RCC) is a stiff mixture of aggregate, cementitious materials, and water, that is compacted by vibratory rollers [ ...
  • Economic Contribution of North Carolinas Ferry System
    Economic Contribution of North Carolina’s Ferry System
    Bert, Steven A. ;
    Norboge, Nicolas
    2020-01-01 | PDF
    The North Carolina Ferry System provides a critical transportation link for North Carolina residents, visitors, and local business owners. Ferry operations in North Carolina can be traced back to several early efforts to better connect both the state’s inner banks with its far-reaching outer banks and as a means for crossing some of the state’s man ...
  • Incorporating Mixed Automated Vehicle Traffic in Capacity Analysis and System Planning Decisions
    Incorporating Mixed Automated Vehicle Traffic in Capacity Analysis and System Planning Decisions
    Soleimaniamiri, Saeid ;
    Shi, Xiaowei
    2020-01-01 | PDF
    It is predicted that half of the vehicles sold and 40% of vehicle travels could be autonomous in the 2040s (Litman 2017). However, how the presence of connected and autonomous vehicles (CAV) impacts highway capacity and network system performance remains unclear. Without this knowledge, it is hard to understand and quantify the implication of the d ...
  • Size and Shape Determination of Riprap and LargeSized Aggregates Using Field Imaging
    Size and Shape Determination of Riprap and Large-Sized Aggregates Using Field Imaging
    Huang, Haohang ;
    Luo, Jiayi
    2020-01-01 | PDF
    Riprap rock and large-sized aggregates are extensively used in transportation, geotechnical, and hydraulic engineering applications. Traditional methods for assessing riprap categories based on particle weight may involve subjective visual inspection and time-consuming manual measurements. Aggregate imaging and segmentation techniques can efficient ...
  • Washington State School Walk Score
    Washington State School Walk Score
    Moudon, Anne Vernez ;
    Shi, Xiao
    2020-01-01 | PDF
    We used unique data from the 2016 Washington State Student Travel Survey combined with built environment data to first confirm the factors shown to influence children walking to and from school in previous literature. Walkability scores were then estimated for K-8 Washington state schools under different data availability scenarios. First, models w ...
  • Predictive Deep Learning for Flood Evacuation Planning and Routing
    Predictive Deep Learning for Flood Evacuation Planning and Routing
    Corns, Steven M ;
    Long, Suzanna K
    2020-01-01 | PDF
    This research was completed in tandem as a project funded through MoDOT and the MidAmerica Transportation Center. It used deep learning methods, along with geospatial data from the USGS National Map and other public geospatial data sources, to develop forecasting tools capable of assessing water level rate of change in high risk flood areas. These ...
  • Development of New Design Guidelines for Protection Against Erosion at Bridge AbutmentsPhase II
    Development of New Design Guidelines for Protection Against Erosion at Bridge Abutments-Phase II
    Constantinescu, George ;
    Wu, Hao
    2020-01-01 | PDF
    Severe floods in the United States Midwest have caused major erosion at bridge abutments despite the fact that their protection design measures followed existing guidelines (e.g., HEC 23, 2001 and following updates through 2009). One likely possibility for the severe bridge erosion observed especially at small bridges is that the methodology to est ...
  • Drivers Interactions with Advanced Vehicles in Various Traffic Mixes and Flows Connected and Autonomous Vehicles CAVs Electric Vehicles EVs V2X Trucks Bicycles and Pedestrians Phase I Driver Behavior Study and Parameters Estimation
    Driver's Interactions with Advanced Vehicles in Various Traffic Mixes and Flows (Connected and Autonomous Vehicles (CAVs), Electric Vehicles (EVs), V2X, Trucks, Bicycles and Pedestrians) - Phase I: Driver Behavior Study and Parameters Estimation
    Jeihani, Mansoureh ;
    Banerjee, Snehanshu
    2020-01-01 | PDF
    Considering the rapid boom in information technology and people’s increasing dependence on mobile data, automotive manufacturers have started equipping vehicles with wireless communication capabilities, manufacturing what are commonly known as connected vehicles, and autonomous systems to assist drivers with certain driving tasks. These technologic ...
  • Laboratory and Field Evaluation of Modified Asphalt Binders and Mixes for Alaskan Pavements
    Laboratory and Field Evaluation of Modified Asphalt Binders and Mixes for Alaskan Pavements
    Liu, Jenny Hsing-I ;
    Liu, Jun
    2020-01-01 | PDF
    In order to properly characterize modified asphalt binders and mixes for Alaskan pavements, this study evaluated properties of 13 asphalt binders typically used in Alaska from three different suppliers, and 10 hot mix asphalt (HMA) mixtures which were either produced in the lab or collected from existing paving projects in Alaska. Various binder an ...
  • Field Implementation of SuperWorkable FiberReinforced Concrete for Infrastructure Construction Volume II
    Field Implementation of Super-Workable Fiber-Reinforced Concrete for Infrastructure Construction [Volume II]
    Khayat, Kamal H. ;
    Abdelrazik, Ahmed
    2020-01-01 | PDF
    A fiber-reinforced super-workable concrete (FR-SWC) made with 0.5% micro-macro steel fibers and 5% CaO-based expansive agent was used for the new deck slab of Bridge A8509. The selected FR-SWC had a targeted slump flow of 20 in. at the casting location. Multiple trial batches were performed, in collaboration with the concrete supplier, to adjust th ...
  • PerformanceBased Engineering of Transportation Infrastructure Considering Multiple Hazards
    Performance-Based Engineering of Transportation Infrastructure Considering Multiple Hazards
    Nikellis, Alexandros ;
    Wu, Teng
    2020-01-01 | PDF
    framework is developed for performance-based engineering of transportation infrastructure considering multiple hazards. The framework builds upon the FEMA P-58 methodology for seismic performance evaluation of buildings, but utilizes an event-based approach in a multi-hazard context and considers both structural and downtime losses. The framework i ...
  • Improving Transportation Performance Measurement via Open Big Data Systems Phase 1 Transit
    Improving Transportation Performance Measurement via Open "Big Data" Systems – Phase 1 Transit
    Barbeau, Sean J. ;
    Pham, Minh
    2020-01-01 | PDF
    Within public transportation, data-driven metrics are fundamental to an agency’s ability to properly plan and manage the resources within their network. Past efforts to analyze the performance of these systems have been hampered by a lack of centralized real-time data archives. Issues such as difficult data acquisition, varying data formats, and li ...
  • Sensitivity Analysis on Highway Noise Level Differences between Leq and Ldn
    Sensitivity Analysis on Highway Noise Level Differences between Leq and Ldn
    Chupp, William ;
    Hastings, Aaron
    2020-01-01 | PDF
    No Description
  • Development of EcoFriendly Ramp Control for Connected and Automated Electric Vehicles
    Development of Eco-Friendly Ramp Control for Connected and Automated Electric Vehicles
    Wu, Guoyuan ;
    Zhao, Zhouqiao
    2020-01-01 | PDF
    With on-board sensors such as camera, radar, and Lidar, connected and automated vehicles (CAVs) can sense the surrounding environment and be driven autonomously and safely by themselves without colliding into other objects on the road. CAVs are also able to communicate with each other and roadside infrastructure via vehicle-to-vehicle and vehicle-t ...
  • HighVolume Recycled Materials for Sustainable Pavement Construction
    High-Volume Recycled Materials for Sustainable Pavement Construction
    Khayat, Kamal H. ;
    Sadati, Seyedhamed
    2020-01-01 | PDF
    The main objective of this research is to evaluate the feasibility of using high-volume recycled materials for concrete production in rigid pavement. The goal was to replace 50% of the solids with recycled materials and industrial by-products. The performance of concrete mixtures made with different fine and coarse recycled concrete aggregate (RCA) ...
  • Before and AfterImplementation Studies of Advanced Signal Control Technologies in Florida Summary
    Before and After-Implementation Studies of Advanced Signal Control Technologies in Florida [Summary]
    Elefteriadou, Lily
    ORCID ICON IMG
    2020-01-01 | PDF
    University of Florida researchers evaluated ATSC operation on several corridors in Florida, before and after installation of ATSC, documenting advantages and disadvantages of different approaches and implementations.
  • Structural Assessment of Inundated Roadways in Livingston Parish Louisiana With the Falling Weight Deflectometer
    Structural Assessment of Inundated Roadways in Livingston Parish, Louisiana With the Falling Weight Deflectometer
    Gaspard, Kevin ;
    Zhang, Zhongjie
    2020-01-01 | PDF
    Researchers discovered strong evidence of damage to Livingston Parish’s inundated roadway system during the flood of August 2016. LTRC conducted a comprehensive structural assessment of inundated roadways in Livingston Parish, Louisiana with the falling weight deflectometer (FWD). Treated (inundated) versus non-treated (non-inundated) statistical m ...
  • Field Testing and Calibration of the Vertical In situ Permeameter VIP Development of An Improved Vertical and Horizontal In situ Permeameter VAHIP
    Field Testing and Calibration of the Vertical In situ Permeameter (VIP) Development of An Improved Vertical and Horizontal In situ Permeameter (VAHIP)
    Mohseni, Ana ;
    Klammler, Harald
    2020-01-01 | PDF
    Hydraulic conductivity (permeability) is a fundamental hydromechanical parameter quantifying the resistance of a permeable medium to water flow. Of interest to Florida Department of Transportation (FDOT) is especially the vertical hydraulic conductivity of the soil underlying stormwater retention ponds, which determines the quickness of stormwater ...
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