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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 5241 - 5260 of 36958 results
  • Stream Restoration Municipal Partnership and Standards
    Stream Restoration Municipal Partnership and Standards
    Kanner, Elizabeth Tane ;
    Hoover, LB
    2020-03-25 | PDF
    Achieving PennDOT’s MS4 and Chesapeake Bay goals can be challenging and costly. Stream restoration projects have been shown to be largely successful in reducing a significant amount of sediment and nutrients to improve water quality, at a more reasonable cost per unit of TMDL credit over most stormwater practices. Most DOTs do not own right-of-way ...
  • Asset Management for Retaining Walls
    Asset Management for Retaining Walls
    Athanasopoulos-Zekkos, Adda ;
    Lynch, Jerome
    2020-03-23 | PDF
    The work described here represents an attempt to develop a comprehensive risk management framework for the asset management of retaining wall structures. The work presented includes the development of a sensing strategy that can be used by structural inspectors to assess the coupled performance of the wall structure and the geotechnical system it s ...
  • Evaluation of the Injury Risks of Truck Occupants Involved in a Crash as a Result of Errant Truck Platoons
    Evaluation of the Injury Risks of Truck Occupants Involved in a Crash as a Result of Errant Truck Platoons
    Jin, Hanxiang ;
    Sharma, Roshan
    2020-03-11 | PDF
    Truck platooning comprises a number of trucks equipped with automated lateral and longitudinal vehicle control technology, which allows them to move in tight formation with short following distances. This study is an initial step toward developing an understanding of the occupant injury risks associated with the multiple sequential impacts between ...
  • Late Life Low Cost Deck Overlays
    Late Life Low Cost Deck Overlays
    ElBatanouny, Mohamed K. ;
    Pham, Le T.
    2020-03-10 | PDF
    Low-slump dense concrete overlays (LSDC) are typically used by the Iowa Department of Transportation (Iowa DOT) to provide long-term performance. However, due to their relatively high costs and long curing, LSDC overlays may not be the optimal solution for late-life bridge decks that require a short service life extension prior to replacement. A li ...
  • Flight Deck Human Factors Issues in Lateral Deviations during North Atlantic NAT Flight Operations
    Flight Deck Human Factors Issues in Lateral Deviations during North Atlantic (NAT) Flight Operations
    Chandra, Divya C ;
    Kendra, Andrew
    2020-03-04 | PDF
    This study examines reported lateral flight path deviations related to the use of half-degree waypoint coordinates in the North Atlantic (NAT). Such waypoints can have ambiguous display labels on flight deck displays, which might result in flightcrew errors. We explored the magnitude of the issue and potential mitigations. We also reviewed literatu ...
  • Evaluation of Freeway Traffic Data Acquisition Technology Quality and Cost or A Comparative Analysis of Alternative Travel Time Data Sources on I80 Freeway
    Evaluation of Freeway Traffic Data Acquisition: Technology, Quality, and Cost or A Comparative Analysis of Alternative Travel Time Data Sources on I-80 Freeway
    Zhang, Michael ;
    Hou, Zenghao
    2020-03-04 | PDF
    This study evaluates the accuracy of the travel time data that are estimated by Dual loop, Waze, HERE, and INRIX against Bluetooth data on multiple segments of the I-80 freeway between Davis and Sacramento, CA. The authors conduct a simulation-based critical sampling rate analysis, which suggests that the Bluetooth travel time data qualifies for ap ...
  • Optimal Driving of Autonomous Vehicle Platoons on Arterial Streets to Reduce Fuel Consumption
    Optimal Driving of Autonomous Vehicle Platoons on Arterial Streets to Reduce Fuel Consumption
    Han, Xiao ;
    Ma, Rui
    2020-03-04 | PDF
    Traffic signals, while serving an important function to coordinate vehicle movements through intersections, also cause frequent stops and delays, particularly when they are not properly timed. Such stops and delays contribute to significant amount of fuel consumption and greenhouse gas emissions. The recent development of connected and automated ve ...
  • Safety Effects of the Yellow Light Border YPB Pedestrian Signal An Evaluation or An Empirical Study on Crossing Behavior at a Signalized Intersection with HighVolume Pedestrians
    Safety Effects of the Yellow Light Border (YPB) Pedestrian Signal: An Evaluation or An Empirical Study on Crossing Behavior at a Signalized Intersection with High-Volume Pedestrians
    Zhang, Michael ;
    Musabbir, Sarder Rafee
    2020-03-04 | PDF
    This study focuses on the pedestrian crossing behavior (individual or group), vehicle yielding action, and possible factors contributing to the conflict at the tourist location (signalized T-intersection) with high volume of pedestrian and traffic. Several attributes including pedestrian demographics (age, gender, etc.), crossing behavior (waiting ...
  • Study of Wind Energy Generation Potential Along North Carolina Highways
    Study of Wind Energy Generation Potential Along North Carolina Highways
    Samberg, Art ;
    Spencer, Ted
    2020-03-04 | PDF
    Renewable energy generation offers opportunities for state agencies, such as the North Carolina Department of Transportation (NCDOT) to reduce costs as well as to reduce their carbon footprint. Additionally, renewable energy provides electrical power for highway services such as lighting and signage, in areas for which the electrical grid is either ...
  • Improvements to NCDOTs Wetland Prediction Model Phase II
    Improvements to NCDOT’s Wetland Prediction Model (Phase II)
    Wang, Sheng-Guo ;
    Smith, Sandy
    2020-03-03 | PDF
    This Final Report is to summarize several main achievements of this project as follows: (i) Method Development for Wetland Type Identification and Prediction; (ii) Wetland Type (Prediction) Automation Tool (WAMTAT) using LiDAR data for non-coastal areas; (iii) Systematic Method Development of Wetland Functional E-Assessment for 16 NCWAM Metrics and ...
  • Role of Coarse Aggregate Porosity on Chloride Intrusion in HPC Bridge Decks
    Role of Coarse Aggregate Porosity on Chloride Intrusion in HPC Bridge Decks
    Wang, Kejin ;
    Shankaramurthy, Bharath Melugiri
    2020-03-01 | PDF
    This study evaluated the effects of coarse aggregate pore system properties on the permeability and chloride ingress of high-performance concrete (HPC) mixes used in bridge decks in Iowa. Five coarse aggregates typically available in Iowa were studied, including three limestone and two dolostone aggregates with different water absorption capacities ...
  • Developing a New Barrier Condition Index BCI to Optimize Barrier Improvements in Wyoming
    Developing a New Barrier Condition Index (BCI) to Optimize Barrier Improvements in Wyoming
    Molan, Amirarsalan Mehara ;
    Moomen, Milhan
    2020-03-01 | PDF
    Traffic barriers are installed on roadsides and medians to shield motorists from hazardous objects and other vehicles. Due to the important role played by traffic barriers in promoting safety, it is important to continuously assess their condition and performance. This study prioritized and ranked traffic barriers on Wyoming’s highways for safety i ...
  • Socioeconomic Dimensions of Resilience to Seaport and Highway Transportation Network Disruption Research Brief
    Socioeconomic Dimensions of Resilience to Seaport and Highway Transportation Network Disruption [Research Brief]
    Wei, Dan ;
    Rose, Adam
    2020-03-01 | PDF
    Serving as critical portals of a nation’s supply-chain, seaports and their associated transportation infrastructure are especially vulnerable to major disruptions from a variety of causes. The economic impacts of these disasters can be extensive well beyond the on-site operations at the port complex, through the supply-chain effects of the disrupti ...
  • The Effects of Landuse Policy on Commuting Distance and Road Related Adverse Health Outcomes or Aligning Transportation Policy with Residential Location Preference Among Tradeoffs
    The Effects of Land-use Policy on Commuting Distance and Road Related Adverse Health Outcomes or Aligning Transportation Policy with Residential Location Preference Among Tradeoffs
    Sprague, Christian ;
    Gao, H Oliver
    2020-03-01 | PDF
    Research shows the use of roadway networks generate health risks thus, the amount of time people use these networks has direct implications for public health. This research hypothesizes a credible link exists between commuting distance, land use policy, and health outcomes. To date, the primary means of investigating commuting distance has been reg ...
  • Federal Road Charge Tax Administration Process
    Federal Road Charge Tax Administration Process
    Jenn, Alan ;
    Fleming, Kelly
    2020-03-01 | PDF
    The gasoline tax is one of the primary sources of revenue for transportation infrastructure funding. However, recent revenue shortfalls due to a combination of inflation, fuel efficiency improvements, and vehicle electrification have led to discussions of alternative funding mechanisms such as the road user charge where drivers would pay fees by mi ...
  • Analytical Modeling Framework To Assess the Economic and Environmental Impacts of Residential Deliveries and Evaluate Sustainable LastMile Strategies
    Analytical Modeling Framework To Assess the Economic and Environmental Impacts of Residential Deliveries, and Evaluate Sustainable Last-Mile Strategies
    Jaller, Miguel ;
    Pahwa, Anmol
    2020-03-01 | PDF
    In the last decade, e‐commerce has grown substantially, increasing business‐to‐business, business‐to‐consumer, and consumer‐to‐consumer transactions. While this has brought prosperity for the e-retailers, the ever-increasing consumer demand has brought more trucks to the residential areas, bringing along externalities such as congestion, air and no ...
  • Crime and Harassment on Public Transportation: A Survey of SJSU Students Set in International Context [supporting dataset
    Agrawal, Asha Weinstein ;
    Loukaitou-Sideris, Anastasia
    2020-03-01 | PDF
    Communities around the world are gradually becoming aware that transit riders, and especially women, are often victims of a wide range of offenses of a sexual nature that happen on buses and trains, and at bus stops and train stations. Better understanding the extent and nature of sexual harassment on transit is a critical issue for transit operato ...
    Dataset Supporting Files
  • Bridge Deck Chloride Testing Protocols Study of US40 Bridges Over the Provo River Utah
    Bridge Deck Chloride Testing Protocols: Study of US-40 Bridges Over the Provo River, Utah
    Brown, Michael C ;
    Thelemann, Alex R
    2020-03-01 | PDF
    A primary contributor to the degradation of reinforced-concrete bridge decks is chloride-induced corrosion, resulting from application of salts for anti-icing/deicing during the winter months. The purpose of this research is to evaluate different methods of chloride testing, including field sampling and laboratory testing methods, to conduct analys ...
  • Bridge Deck Asphalt Concrete Pavement Armoring
    Bridge Deck Asphalt Concrete Pavement Armoring
    Haynes, Matthew ;
    Coleri, Erdem
    2020-03-01 | PDF
    Deterioration of the concrete bridge deck is one of the most significant problems affecting the service life of bridges in the United States. Moisture penetration into the asphalt overlay and standing water on the concrete bridge deck result in expansion and contraction at the interface on the bridge deck during freeze-thaw cycles. This causes debo ...
  • Design and Performance Verification of a Bridge ColumnFootingPile System for Accelerated Bridge Construction ABC
    Design and Performance Verification of a Bridge Column/Footing/Pile System for Accelerated Bridge Construction (ABC)
    Cheng, Zhao ;
    Sritharan, Sri
    2020-03-01 | PDF
    The use of prefabricated components has been continuously gaining momentum in bridge construction because of its numerous advantages over conventional cast-in-place construction methods. However, there are few, if any, projects that have utilized prefabricated components to construct the entire bridge column/footing/pile system because the sufficie ...
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