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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 2101 - 2120 of 35888 results
  • Asphalt RealTime Smoothness ARTS for Asphalt Paving
    Asphalt Real-Time Smoothness (ARTS) for Asphalt Paving
    Chang, George K ;
    Merritt, Dave
    2023-02-01 | PDF
    Real-Time Smoothness (RTS) measures pavement surface profiles during paving using sensors mounted on the back of a paver. The Federal Highway Administration (FHWA) has supported implementing RTS technology for concrete pavements through the SHRP2 Solutions program since 2014. Its study indicated that RTS technology's real-time diagnosis allows chan ...
  • Fiber Reinforced Concrete for Bridge Deck Overlays
    Fiber Reinforced Concrete for Bridge Deck Overlays
    Amini, Kamran ;
    Vaddey, Pavan
    2023-02-01 | PDF
    This report reviews available research literature and reports on Fiber Reinforced Concrete (FRC) mixtures to recognize best practices of using FRC overlay mixtures and identify products with the potential of being successfully utilized in Missouri. State DOT representatives were surveyed to consolidate the current state of practice as it relates to ...
  • Safety Evaluation of Permissive Flashing Yellow Arrows for LeftTurn Movements in Missouri
    Safety Evaluation of Permissive Flashing Yellow Arrows for Left-Turn Movements in Missouri
    Jones, Joseph G. ;
    Foster, Nick
    2023-02-01 | PDF
    With over a decade of crash data available since the beginning of flashing yellow arrow (FYA) use, MoDOT decided to objectively investigate the safety performance of the system. Additionally, they wished to have an accurate inventory of all FYA installations statewide, and a determination of the benefit-cost ratio of the signal system. A virtual su ...
  • Development of a Geotechnical Asset Management Collection and Rating Program for Missouri Department of Transportation
    Development of a Geotechnical Asset Management Collection and Rating Program for Missouri Department of Transportation
    Mines, Aine E ;
    Beckstrand, Darren L.
    2023-02-01 | PDF
    Asset Management (GAM)program through close collaboration with MoDOT geotechnical engineers and MoDOT’s IT group. The team adjusted published and commonly accepted categories from state and federal GAM inventory and rating approaches to match conditions specific to Missouri. The GAM program compiles condition and risk assessment for six asset types ...
  • Best Types of Commodity Flow Data for Freight Railroad and Ports and Waterways Studies
    Best Types of Commodity Flow Data for Freight, Railroad, and Ports and Waterways Studies
    Fonseca, Camila ;
    Zeerak, Raihana
    2023-02-01 | PDF
    The understanding of freight movement is critical to economic development and competitiveness and to make decisions regarding the transportation system. Despite the increased interest in freight planning and modeling, freight data are limited in availability and granularity, and the existing sources are incomplete or outdated. This research analyze ...
  • Criteria and Guidelines for ThreeLane Road Design and Operation
    Criteria and Guidelines for Three-Lane Road Design and Operation
    Davis, Gary A. ;
    Hourdos, John
    2023-02-01 | PDF
    A 4-3 conversion involves changing a four-lane undivided road into one with two general travel lanes separated by a two-way left turn lane. A commonly-used guideline states that a 4-3 conversion can be considering as long as the road’s average annual daily traffic (AADT) volume does not exceed 15,000 vehicles/day but opinions vary, from lowering th ...
  • Determining Optimal Traffic Opening Time Through Concrete Strength Monitoring Wireless Sensing
    Determining Optimal Traffic Opening Time Through Concrete Strength Monitoring: Wireless Sensing
    Kong, Zhihao ;
    Lu, Na
    2023-02-01 | PDF
    Construction and concrete production are time-sensitive and fast-paced; as such, it is crucial to monitor the in-place strength development of concrete structures in real-time. Existing concrete strength testing methods, such as the traditional hydraulic compression method specified by ASTM C 39 and the maturity method specified by ASTM C 1074, are ...
  • Rural Community Transit Strategies Building on Expanding and Enhancing Existing Assets and Programs
    Rural Community Transit Strategies: Building on, Expanding, and Enhancing Existing Assets and Programs
    Fisher, Thomas ;
    Vogel, M.
    2023-02-01 | PDF
    This project involved the development of innovative sharing-economy strategies to address rural transit challenges in Greater Minnesota. Many transit services and transportation network companies (TNC’s) like Uber and Lyft do not provide services to commuters outside metro areas, forcing most residents in Greater Minnesota to own automobiles. Meanw ...
  • 2023 Progress Report on the National Roadway Safety Strategy
    2023 Progress Report on the National Roadway Safety Strategy
    United States. Department of Transportation. Office of the Secretary of Transportation
    2023-02-01 | PDF
    This report provided an update on the roadway safety problem, an overview of the Departmental actions underway to address the ongoing crisis on our roadways, a description of new priority actions that will build on the NRSS, and an explanation of how USDOT is working with stakeholders to further advance safety to save lives and prevent harm to all ...
  • Integration of WeedSuppressive Bacteria with Herbicides to Reduce Exotic Annual Grasses and Wildfire Problems on ITD RightofWays
    Integration of Weed-Suppressive Bacteria with Herbicides to Reduce Exotic Annual Grasses and Wildfire Problems on ITD Right-of-Ways
    Lazarus, Brynne E ;
    Germino, Matthew J
    2023-02-01 | PDF
    Invasion by exotic-annual grasses such as cheatgrass is impacting semiarid rangelands and especially transportation corridors, where it causes increased wildfire and many other environmental issues. Methods of reducing exotic annual grasses and restoring native perennials are needed, particularly testing of their intended target or unintended, non- ...
  • Eastern Massasauga Rattlesnake Ohio Population Survey and Survey Technique Development
    Eastern Massasauga Rattlesnake: Ohio Population Survey and Survey Technique Development
    Hoffman, Andrew ;
    Amber, Evan
    2023-02-01 | PDF
    The Eastern Massasauga Rattlesnake (Sistrurus catenatus; EMR) has declined through most of its range and is endangered in Ohio and federally threatened. Areas that EMR may inhabit must be surveyed prior to approving development projects. Therefore, comprehensive, fast, and affordable survey techniques for the EMR are of interest to government and n ...
  • Eastern Massasauga Rattlesnake Ohio Population Survey and Survey Technique Development Fact Sheet
    Eastern Massasauga Rattlesnake: Ohio Population Survey and Survey Technique Development [Fact Sheet]
    Peterman, William ;
    Lipps, Gregory
    2023-02-01 | PDF
    Eastern Massasaugas (Sistrurus catenatus) endangered in Ohio and federally threatened. Current approved survey methods involve corrugated tin surveys supplemented by visual encounter surveys. While effective, these traditional methods have low detection rates and require intensive field effort which can complicate environmental reviews of project i ...
  • Draft Report for Geoarchaeological Survey Methods for Enhanced Decision Making in the Ohio Department of Transportations Project Development Process
    Draft Report for Geoarchaeological Survey Methods for Enhanced Decision Making in the Ohio Department of Transportation’s Project Development Process
    Dam, Seth Van ;
    Laswell, Jeff
    2023-02-01 | PDF
    The Ohio Department of Transportation (ODOT) Office of Statewide Planning & Research, Research Section contracted Gray & Pape, Inc., to conduct research to provide a comparison of geophysical survey methods, instruments, equipment, and associated software to determine what instrument or combination of instruments works best in different scenarios. ...
  • Geoarchaeological Survey Methods for Enhanced DecisionMaking in the Ohio Department of Transportations Project Development Process Fact Sheet
    Geoarchaeological Survey Methods for Enhanced Decision-Making in the Ohio Department of Transportation’s Project Development Process [Fact Sheet]
    Dam, Seth Van ;
    Laswell, Jeff
    2023-02-01 | PDF
    The objective of this geophysical technical research was to aid the Ohio Department of Transportation’s (ODOT) Office of Environmental Services (OES) to provide a baseline understanding of geophysical techniques and their applications to various types of archaeological investigative situations, and to provide recommendations for the implementation ...
  • Domestic Airline Fares Consumer Report Third Quarter 2022 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: Third Quarter 2022 Passenger and Fare Information
    United States. Department of Transportation
    2023-02-01 | Domestic Airline Fares Consumer Report | PDF
    Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric ...
  • Green Bike Lane Evaluation for Florida Pavements
    Green Bike Lane Evaluation for Florida Pavements
    Nyamuhokya, Tito ;
    Wilson, Bryan
    2023-02-01 | PDF
    The objectives of this project were to identify the causes of the premature failure of Florida's green-colored pavement markings (GCPMs) and to produce guidelines and improved specifications for the future installation and testing of new GCPM materials. The researchers reviewed relevant literature, interviewed contractors and vendors, visited exist ...
  • Automated Extraction of Weather Variables from Imagery
    Automated Extraction of Weather Variables from Imagery
    Wiener, Gerry ;
    Petzke, William
    2023-02-01 | PDF
    Department of transportation (DOT) maintenance supervisors utilize a variety of tools including maintenance decision support systems (MDSS) to gain a better understanding of current and future road surface conditions (RSC) during winter weather. MDSS automatically attempt to deduce current RSC based on road weather information system (RWIS) and oth ...
  • Automated Extraction of Weather Variables from Imagery Summary
    Automated Extraction of Weather Variables from Imagery [Summary]
    National Center for Atmospheric Research (U.S.)  ...
    2023-02-01 | PDF
    Machine learning techniques that automatically identify winter road surface conditions in highway camera images have the potential to improve maintenance decision support systems.
  • NonTraffic Surveillance Fatality and Injury Statistics in NonTraffic Crashes 2016 to 2020 Revised Traffic Safety Facts
    Non-Traffic Surveillance: Fatality and Injury Statistics in Non-Traffic Crashes, 2016 to 2020 (Revised) [Traffic Safety Facts]
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2023-02-01 | PDF
    Based on the Non-Traffic Surveillance (NTS) system, an estimated average of 2,449 people were killed each year in non-traffic motor vehicle crashes during the 5-year period from 2016 to 2020. About a third (35%) of those people killed were nonoccupants such as pedestrians and bicyclists. Additionally, on average, an estimated 86,920 people were inj ...
  • Development of Crash Modification Factors CMFs for Utah Intersections
    Development of Crash Modification Factors (CMFs) for Utah Intersections
    Gong, Yaobang ;
    Yang, Xianfeng Terry
    2023-02-01 | PDF
    This research project aims at developing state-specific CMFs at intersections in Utah to quantify the safety impact of the countermeasures. Considering the research needs, data availability, and suggestions from the Technical Advisory Committee, the CMFs of four left-turn-phasing-related treatments, namely converting both-roadway permissive to one- ...
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