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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 5141 - 5160 of 36908 results
  • Implementation of an Improved Shear Key Detail in the Buffalo Branch Bridge
    Implementation of an Improved Shear Key Detail in the Buffalo Branch Bridge
    Field, Carrie ;
    Roberts-Wollmann, Carin L.
    2020-05-01 | PDF
    Adjacent box beam bridges are economical bridge systems for accelerated bridge construction. The box beams are constructed at precast plants and are traditionally connected by a shear key filled with grout. This system is typically used for short spans with low clearance restrictions. However, due to the grout deteriorating and debonding from the p ...
  • Potential Socioeconomic Forecasts in Support of VTrans
    Potential Socioeconomic Forecasts in Support of VTrans
    Bhairavabhatla, Haritha ;
    O'Leary, Amy A.
    2020-05-01 | PDF
    In support of VTrans, this report summarizes potential changes in population, employment, and household income that are forecast from various sources and identifies potential transportation implications. Statewide, Virginia’s population is forecast to grow 24% to 33% from 2017-2045, with four regions clustered along the I-95 corridor (roughly the p ...
  • Consultant Support for ICPMTPS Projects
    Consultant Support for IC-PMTPS Projects
    Chang, George K ;
    Gilliland, Amanda
    2020-05-01 | PDF
    Due to the success of the Missouri Department ot Transportation (MoDOT) 2017 Intelligent Compaction (IC) and Infrared Scanning (IR) projects that demonstrated quality control improvements on 13 field projects, MoDOT established a plan that included further IC and Paver-mounted Thermal Profile Systems (PMTPS) projects in 2018-2019 with a goal of ful ...
  • Probabilistic Liquefaction Triggering and Lateral Spread Hazard Maps for Davis Weber Salt Lake and Utah Counties Utah
    Probabilistic Liquefaction Triggering and Lateral Spread Hazard Maps for Davis, Weber, Salt Lake, and Utah Counties, Utah
    Franke, Kevin W ;
    Bartlett, Steven
    2020-05-01 | PDF
    Utah’s intermountain valleys along the western edge of the Wasatch Front contain widespread deposits of loose, saturated, cohesionless soils that are susceptible to liquefaction during major, nearby earthquakes. Liquefaction can induce ground deformations that can be very damaging to buildings, roadways, bridges, pipelines, buried structures, etc. ...
  • Cost and Benefit Analysis of Installing Fiber Optics on INDOT Projects
    Cost and Benefit Analysis of Installing Fiber Optics on INDOT Projects
    Iyer, Ananth V ;
    Dunlop, Steven R
    2020-05-01 | PDF
    The Indiana Department of Transportation (INDOT) is tasked with the stewardship of billions of dollars’ worth of publicinvested highway infrastructure. Not only does INDOT continually seek design and operational policies that foster cost effective project delivery and procurement, they also seek opportunities for revenue generation. Due to populati ...
  • Verification of WBUZPILE Design Methodology and the Development of a LRFD Driven Pile Resistance Factor Calibration for Alabama Soils
    Verification of WBUZPILE Design Methodology and the Development of a LRFD Driven Pile Resistance Factor Calibration for Alabama Soils
    Steward, Eric J. ;
    Cleary, John
    2020-05-01 | PDF
    In 2007, the American Association of State Highway and Transportation Officials published a new policy requiring the application of the Load and Resistance Factor Design (LRFD) methodology for pile foundations. The Alabama Department of Transportation (ALDOT) currently uses LRFD, however, the LRFD resistance factor used is not based on reliability ...
  • Understanding OversizeOverweight Industry Freight Flow and Safety in Kansas Using the Kansas Truck Routing and Intelligent Permitting System KTRIPS Technical Summary
    Understanding Oversize/Overweight Industry Freight Flow and Safety in Kansas Using the Kansas Truck Routing and Intelligent Permitting System (K-TRIPS) [Technical Summary]
    Morris, Blake ;
    Fitzsimmons, Eric J.
    2020-05-01 | PDF
    The Kansas Department of Transportation (KDOT) developed an automated permitting system called the Kansas Truck Routing and Intelligent Permitting System (K-TRIPS) to issue permits for all OSOW trucks. Using four years of data from K-TRIPS (2014‒2017), the research team developed a series of heat maps using ArcGIS to help visualize the routes OSOW ...
  • Benefits of Transportation Research in Utah
    Benefits of Transportation Research in Utah
    Anderson, Douglas I.
    2020-05-01 | PDF
    This study was initiated to estimate the benefits of Utah Department of Transportation's (UDOT's) research projects over a four-year period, and estimate a benefit-cost ratio for the program. Benefit information gathered in this study indicates that the studies completed during the years 2013 through 2016 by the UDOT research program had an estimat ...
  • DemandDriven Operational Design for Shared Mobility with Ridepooling Options
    Demand-Driven Operational Design for Shared Mobility with Ride-pooling Options
    Zhao, Dongfang ;
    Guo, Xiaotong
    2020-04-30 | PDF
    This project aims to develop a demand-driven approach for shared mobility operations with machine learning and math programming methods. The objective of this approach is to incorporate economic, environment and equity impacts over an entire operational cycle. Both ride-hailing systems (e.g. Lyft) and ride-pooling systems (e.g. UberPool) will be in ...
  • Exploring Crowdsourced Monitoring Data for Safety
    Exploring Crowdsourced Monitoring Data for Safety
    Turner, Shawn ;
    Martin, Michael
    2020-04-30 | PDF
    This project included four distinct but related exploratory studies of data sources that could improve roadway safety analysis. The first effort evaluated passively gathered crowdsourced bicyclist activity data from StreetLight Data and found promising correlations (R2 of 62% and 69% for monthly weekday and weekend daily averages) when the StreetLi ...
  • Experimental Investigation of Residual Compressive Strength of Partially Confined Concrete Column Retrofitted Using CFRP Wrap
    Experimental Investigation of Residual Compressive Strength of Partially Confined Concrete Column Retrofitted Using CFRP Wrap
    Aslan, K ;
    Shokouhian, M
    2020-04-30 | PDF
    External confinement of concrete columns by means of carbon fiber reinforced polymer (CFRP) wraps has proven to be an efficient technique for structural retrofitting and strengthening. This report presents an experimental investigation that was conducted to assess the residual compressive strength of CFRP wrapped 1/6-scale concrete columns using st ...
  • Investigation Testing and Development of an RFID System for Effective Maintenance of the Existing National Transportation Infrastructure
    Investigation, Testing and Development of an RFID System for Effective Maintenance of the Existing National Transportation Infrastructure
    Jones, Erick C. ;
    Rathore, Abhisheksinh
    2020-04-30 | PDF
    This project seeks to investigate how RFID sensors can detect black ice remotely to reduce the number of accidents caused by this thin layer of ice when it is not visible. Black ice, sometimes called clear ice, is a thin coating of ice that is visually transparent and often hard for drivers to identify. The detection of this thin layer of ice is di ...
  • Development of MASH Computer Simulated Steel Bridge Rail and Transition Details
    Development of MASH Computer Simulated Steel Bridge Rail and Transition Details
    Plaxico, Chuck A. ;
    Ray, Ethan M
    2020-04-28 | PDF
    The predominate bridge rail and approach guardrail transition (AGT) systems used among the New England states include details for 2-bar, 3-bar and 4-bar designs which were developed and tested under previous crash test standards (i.e., AASHTO GSBR PL2 and NCHRP Report 350). These basic designs are currently being implemented among various participa ...
  • Development of MASH Computer Simulated Steel Bridge Rail and Transition Details
    Development of MASH Computer Simulated Steel Bridge Rail and Transition Details
    Plaxico, Chuck A. ;
    Ray, Ethan M.
    2020-04-28 | PDF
    The predominate bridge rail and approach guardrail transition (AGT) systems used among the New England states include details for 2-bar, 3-bar and 4-bar designs which were developed and tested under previous crash test standards (i.e., AASHTO GSBR PL2 and NCHRP Report 350). These basic designs are currently being implemented among various participa ...
  • Spatio‐Temporal Analysis of Freight Patterns in Southern California [supporting datasets]
    Jaller, Miguel ;
    Rivera, Daniel
    2020-04-24 | PDF
    There has been general trend to shift the location of warehouses and distribution facilities away from consumer markets (logistics sprawl) in Southern California. This shift has a negative impact on cost and the environment because freight vehicles have to travel longer to reach their destinations. However, during the last decade, this trend has no ...
    Dataset Supporting Files
  • Understanding and Guiding Pedestrian and Crowd Motion
    Understanding and Guiding Pedestrian and Crowd Motion
    Yang, Dongfang ;
    Redmill, Keith
    2020-04-24 | PDF
    Future transportation system is expected to be in a hybrid form instead of the basic road-vehicle-passenger relationship that is still very common in most transportation systems. That is to say, future transportation will cover additional scenarios and different types of vehicles with partial or full automation. A very representative example is the ...
  • Utilizing Highway Rest Areas for Electric Vehicle Charging: Economics and Impacts on Renewable Energy Penetration in California [supporting datasets]
    Kiani, Behdad ;
    Ogden, Joan
    2020-04-20 | PDF
    California policy is incentivizing rapid adoption of zero emission electric vehicles for light duty and freight applications. In this project, we explored how locating charging facilities at California’s highway rest stops, might impact electricity demand, grid operation, and integration of renewables like solar and wind into California’s energy mi ...
    Dataset Supporting Files
  • Examining the Traffic Safety Effects of Urban Rail Transit A Review of the National Transit Database and a BeforeAfter Analysis of the Orlando SunRail and Charlotte Lynx Systems
    Examining the Traffic Safety Effects of Urban Rail Transit: A Review of the National Transit Database and a Before-After Analysis of the Orlando SunRail and Charlotte Lynx Systems
    Dumbaugh, Eric ;
    Saha, Dibakar
    2020-04-15 | PDF
    Studies of rail transit safety typically focus on collisions involving rail vehicles and other road users. Nonetheless, the introduction of new rail transit into a metropolitan area may result in changes to the design and use of streets and intersections that influence the safety of other road users. This study conducts a before-after analysis of t ...
  • Blockchain for Unmanned Aircraft Systems
    Blockchain for Unmanned Aircraft Systems
    McGovern, Seamus
    2020-04-15 | PDF
    This white paper provides a high-level study of unmanned aircraft systems' flight operations that may benefit from the application of blockchain concepts.
  • Correlation Analysis of MDSS and NEWINS
    Correlation Analysis of MDSS and NEWINS
    Anderson, Mark R. ;
    Walker, Curtis L.
    2020-04-15 | PDF
    Improving winter maintenance is a goal of most transportation agencies including the Nebraska Department of Transportation (NDOT). One approach is to develop a decision support system to aid in the winter maintenance recommendations. Iteris has developed a maintenance decision support system (MDSS) and has teamed up with NDOT to provide winter weat ...
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