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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 6421 - 6440 of 36049 results
  • Analysis of Bicycle and Pedestrian Crash Causes and Interventions
    Analysis of Bicycle and Pedestrian Crash Causes and Interventions
    Chavis, Celeste ;
    Lee, Young-Jae
    2018-10-01 | PDF
    Pedestrian and bicycle crashes have been over-represented in comparison with their share in commute and all trips share because they are vulnerable road users and usually exposed and unprotected to the traffic. The fatality rates of pedestrians and bicyclists have been significantly higher than national average rates in Washington, DC. Improving th ...
  • Investigation and Development of a Test Level 6 Barrier Phase I
    Investigation and Development of a Test Level 6 Barrier, Phase I
    Whitfield, Dean L. ;
    Schmidt, Jennifer D.
    2018-10-01 | PDF
    The objective of this research project was to develop a new, cost-effective, MASH TL-6 barrier. A literature review on prior Test Level 5 and Test Level 6 barriers was conducted, and the cost of current TL-5 and TL-6 barriers was established. Existing and modified design procedures for roadside barrier were reviewed as well as current TL-6 design f ...
  • Integral Abutment Connection Details for Accelerated Bridge Construction
    Integral Abutment Connection Details for Accelerated Bridge Construction
    Hosteng, Travis K. ;
    Shafei, Behrouz
    2018-10-01 | PDF
    During bridge construction, closures have significant impacts on traffic flow for the public. To alleviate this impact, the presence of precast elements is being introduced in the design and construction of bridges, which would increase the efficiency of construction and convert month-long, or even year-long, closures into a matter of weeks, or per ...
  • Field Performance Evaluation of Sustainable Aggregate ByProduct Applications
    Field Performance Evaluation of Sustainable Aggregate By-Product Applications
    Qamhia, Issam ;
    Tutumluer, Erol
    2018-10-01 | PDF
    Research efforts at the Illinois Center for Transportation (ICT) focused on evaluating new sustainable applications of Quarry By-products (QB) or QB mixed with other marginal, virgin, or recycled aggregate materials in pavements, as unbound or chemically stabilized pavement layers. Sixteen full-scale test sections were constructed to evaluate the u ...
  • StreamStats for South Carolina A Multipurpose WaterResources Web Application
    StreamStats for South Carolina: A Multipurpose Water-Resources Web Application
    Feaster, Toby D. ;
    Clark, Jimmy M
    2018-10-01 | PDF
    The U.S. Geological Survey (USGS) developed the South Carolina StreamStats application in cooperation with the South Carolina Department of Transportation. StreamStats (https://water.usgs.gov/osw/streamstats/) is a map-based web application that provides analytical tools useful for water-resources planning and management and many engineering purpos ...
  • Improving Freight Efficiency with Load Matching Technology Brief
    Improving Freight Efficiency with Load Matching Technology [Brief]
    Steimetz, Seiji
    ORCID ICON IMG
    2018-10-01 | PDF
    Load-matching technology, or digital freight matching (DFM), helps an inefficient and often fragmented local trucking market by eliminating non-revenue-generating trips. The basic idea of the technology is to provide a real-time, GPS-based connection between shippers and carriers, somewhat similar to how Uber and Lyft connect drivers and passengers ...
  • Advancing Traveler Information Technologies for Priced Managed Lane Networks
    Advancing Traveler Information Technologies for Priced Managed Lane Networks
    Wood, Nick ;
    Chrysler, Sue
    2018-10-01 | PDF
    Managed lane networks are complex, interconnected facilities that require advancements in traveler information to successfully serve the users of those facilities. Historically, managed lanes were typically developed for single, distinct corridors, providing preferential access for users who travel from one endpoint to another. The success of past ...
  • Effectiveness of Seasonal Deer Advisories on Changeable Message Signs as a Deer Crash Reduction Tool
    Effectiveness of Seasonal Deer Advisories on Changeable Message Signs as a Deer Crash Reduction Tool
    Donaldson, Bridget M. ;
    Kweon, Young-Jun
    2018-10-01 | PDF
    The Virginia Department of Transportation (VDOT) began posting deer advisory messages on changeable message signs (CMSs) along a 16.7-mile segment of I-64 between Waynesboro and Charlottesville, Virginia, in October 2015. The posting of these messages during the peak of deer activity, October-November from 5 P.M. to 9 A.M., was intended to raise dr ...
  • Automated Estimation of Winter Driving Conditions
    Automated Estimation of Winter Driving Conditions
    Baldwin, Michael E ;
    Burris, Kevin D
    2018-10-01 | PDF
    There is great potential for improvements in traveler safety and satisfaction as new sources of information are incorporated into advanced analytics and prediction systems. It is critical for transportation agencies to be able to monitor weather conditions in real-time as well as over the long-term for purposes of maintenance, planning, and perform ...
  • Streamlined Access Permitting Process
    Streamlined Access Permitting Process
    Bassett, David R. ;
    Seat, Marlee L.
    2018-10-01 | PDF
    As part of the approval process for an access to a property, developers are sometimes required to perform a Traffic Impact Study (TIS), which takes time and money. This process also demands a significant amount time and resources from UDOT‘s Permits Department. There is a need to increase the efficiency of the permitting process, increase the numbe ...
  • Assessment of New Mexicos Fee Structure for Overweight and Oversize Vehicles Compared to Practices in Other Western States
    Assessment of New Mexico’s Fee Structure for Overweight and Oversize Vehicles Compared to Practices in Other Western States
    Dehghan-Niri, Ehsan ;
    Cortes, Douglas
    2018-10-01 | PDF
    This research project provides a comparative assessment of oversize /overweight (OS/OW) vehicle permits and fees in New Mexico and other western states. The authors provide a review of current permitting practices, fee structures, fines, legal and permitted maximum weight and dimension limits, escort requirements and charges, compliance assessment ...
  • Benefits of Transit Making the Case That NJ TRANSIT Brings Real Value to New Jerseys Citizens
    Benefits of Transit: Making the Case That NJ TRANSIT Brings Real Value to New Jersey’s Citizens
    Titze, Christopher ;
    Baumgartner, David
    2018-10-01 | PDF
    In the current era of stagnant and even shrinking availability of funding, the ability to make the case for transportation and infrastructure financing is perhaps more important than ever. Factors of a growing and increasingly urbanized population, increasing maintenance demands, and the need to keep up with technological and safety-mandated enhanc ...
  • Evaluation of NonDestructive Density Determination for QAQC Acceptance Testing
    Evaluation of Non-Destructive Density Determination for QA/QC Acceptance Testing
    Mata, David ;
    Ferguson, Nicholas
    2018-10-01 | PDF
    Density is often considered one of the most important parameters for long-term pavement performance. Proper density specifications require the contractor and the Louisiana Department of Transportation and Development (DOTD) to follow quality control (QC) and quality assurance (QA) procedures. Contractors often utilize the nuclear density gauge (NDG ...
  • Economic Competitiveness Definitions and Metrics
    Economic Competitiveness, Definitions and Metrics
    Giuliano, Genevieve ;
    Hassan, Mohammed
    2018-10-01 | PDF
    This Task Order continues earlier work aimed at establishing performance measures for monitoring the economic competitiveness of the freight sector as part of the implementation of the California Sustainable Freight Action Plan (CSFAP). The purpose of this task order is to define competitiveness in California's freight sector, and work with industr ...
  • Effect of Pile Embedment Length on the Connection Behavior and Precast Pile Footing
    Effect of Pile Embedment Length on the Connection Behavior and Precast Pile Footing
    Ronanki, Vidya Sagar ;
    Willis, Gabrielle
    2018-10-01 | PDF
    Rapid economic and population growth, along with deteriorating bridge infrastructure, is putting a persistent strain on the nation's transportation network. Federal and state transportation departments (DOTs) are looking for new ways to build, repair, or replace bridges quickly and with minimal interruption to the traveling public. The FHWA has beg ...
  • Operation of Marine Exhaust Gas Scrubbing Equipment aboard the Great Lakes SelfUnloading Motor Vessel Lee A Tregurtha
    Operation of Marine Exhaust Gas Scrubbing Equipment aboard the Great Lakes Self-Unloading Motor Vessel Lee A. Tregurtha
    The Interlake Steamship Company
    2018-10-01 | PDF
    The Interlake Steamship Company is a privately held company headquartered near Cleveland, Ohio in Middleburg Heights. Interlake and is predecessor companies trace their history back more than 100 years on the Great Lakes. The Company, which employs about 400 people, owns and operates a fleet of eight (8) self-unloading bulk carrying ships on the Gr ...
  • Effect of Proximity of Sheet Pile Walls on the Apparent Capacity of Driven Displacement Piles Summary
    Effect of Proximity of Sheet Pile Walls on the Apparent Capacity of Driven Displacement Piles [Summary]
    Chung, Jae H. ;
    McVay, Michael C.
    2018-10-01 | PDF
    The present research investigated the effects that installation and removal of sheet pile walls (SPW) have on driven piles founded in granular soils. The efforts completed as part of the present study have involved both physical testing and numerical simulation of standardized laboratory tests on granular materials. Further, physical centrifuge tes ...
  • Safety Evaluation of Raised Speed Limits on Kansas Freeways Technical Summary
    Safety Evaluation of Raised Speed Limits on Kansas Freeways [Technical Summary]
    Dissanayake, Sunanda ;
    Shirazenijad, Reza
    2018-10-01 | PDF
    Setting an appropriate speed limit is necessary to provide safe and efficient traffic operations for all road users. It must also be acceptable to the public and enforceable by police. Lower-than-required speed limits may make most drivers non-compliant, whereas higher-than-required speed limits may increase the number of crashes together with rela ...
  • Concept of Operations for a RouteBuilder Based Toll RoadManaged Lanes Information System
    Concept of Operations for a Route-Builder Based Toll Road/Managed Lanes Information System
    Wood, Nick ;
    Kaufman, Jeff
    2018-10-01 | PDF
    This document is a Concept of Operations for using a Route Builder, similar to route builders on mapping platforms like Google® and Bing®, to provide users comprehensive information about the tolled and managed lane facilities, operational nature of these systems, and the costs of a proposed trip. This approach would allow multiple tolling agencies ...
  • Monitoring and Assessing Traffic Safety at Signalized Intersections Using Live Video Images
    Monitoring and Assessing Traffic Safety at Signalized Intersections Using Live Video Images
    Yang, Jidong J ;
    Wang, Ying
    2018-10-01 | PDF
    Signalized intersections represent the most hazard spots on a roadway network. Road users are required to be alert and timely process and respond to a variety of information at signalized intersections, including traffic signal indications and changes, signage, pavement marking, road conditions, and a mix of various road users in conflict. Traditio ...
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