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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 7481 - 7500 of 36114 results
  • Composite Action in Prestressed NU IGirder Bridge Deck Systems Constructed with Bond Breakers to Facilitate Deck Removal
    Composite Action in Prestressed NU I-Girder Bridge Deck Systems Constructed with Bond Breakers to Facilitate Deck Removal
    Li, Chaohui ;
    Lequesne, Remy D.
    2017-11-01 | PDF
    Results are reported from tests of small-scale push-off and large-scale composite NU I-girder specimens conducted to establish an interface connection detail that (1) Facilitates in-situ removal of the bridge deck without damaging prestressed girders, and (2) Maintains composite action between the prestressed girder and reinforced concrete deck thr ...
  • Accelerated Innovation Deployment AID Demonstration KYTCRoundabout Installation Project in London Kentucky
    Accelerated Innovation Deployment (AID) Demonstration : KYTC—Roundabout Installation Project in London, Kentucky.
    Jasper, Jeff ;
    Kirk, Adam
    2017-11-01 | PDF
    This document serves as the final report on the construction and opening of the Roundabout Project in London, Kentucky (Kentucky Item Number 11‐904.1). This project (hereafter referred to as the London Roundabout) was constructed on the authority of the Kentucky Transportation Cabinet (KYTC), which received an Accelerated Innovation Deployment (AID ...
    Supporting Files
  • Developing Extended Strands in GirderCap Beam Connections for Positive Moment Resistance
    Developing Extended Strands in Girder-Cap Beam Connections for Positive Moment Resistance
    Tsvetanova, Kristina ;
    Stanton, John F.
    2017-11-01 | PDF
    In bridges constructed with precast prestressed concrete girders, resistance to seismic effects is achieved by the interaction between the columns, the cap beam and the girders. These components must be connected to provide flexural resistance. Under the impact of longitudinal seismic motion, the bottom flanges of the two girders that meet end-to-e ...
  • Transportation Network Data Requirements for Assessing Criticality for Resiliency and Adaptation Planning
    Transportation Network Data Requirements for Assessing Criticality for Resiliency and Adaptation Planning
    Dowds, Jonathan ;
    Sentoff, Karen
    2017-11-01 | PDF
    This report is one of two NCST Research Report documents produced as part of a project toadvance the technical modeling tools for resiliency and adaptation planning, especially those used for criticality rankings. The official final technical report, Climate Adaptation and Resiliency Planning: Agency Roles and Workforce Development Needs, summarize ...
  • The Economic Benefits of Vehicle Miles Traveled VMTReducing Placemaking Synthesizing a New View
    The Economic Benefits of Vehicle Miles Traveled (VMT)-Reducing Placemaking: Synthesizing a New View
    Boarnet, Marlon G. ;
    Burinskiy, Evgeny
    2017-11-01 | PDF
    This paper analyzes evidence on the economic benefits of placemaking efforts that prioritize pedestrian and non-motorized access and that, at times, reduce vehicle miles traveled. The previous literature on the economic impacts of transportation has focused on theorizing and gathering evidence on ways that transportation infrastructure generates ec ...
  • Identification and Recommendations for Correction of Equipment Factors Causing Fatigue in Snowplow Operations
    Identification and Recommendations for Correction of Equipment Factors Causing Fatigue in Snowplow Operations
    Camden, Matthew C. ;
    Hickman, Jeffrey S.
    2017-11-01 | PDF
    The objective of this project was to recommend cost-effective equipment solutions to mitigate fatigue experienced by winter maintenance operators. A questionnaire collected the opinions on the relationship between equipment and fatigue from 2,011 winter maintenance operators in 23 Clear Roads states. An analysis of the existing literature and quest ...
  • Preliminary Procedure for Structural Design of Pervious Concrete Pavements
    Preliminary Procedure for Structural Design of Pervious Concrete Pavements
    Nassiri, Somayeh ;
    AlShareedah, Othman
    2017-11-01 | PDF
    Pervious concrete (PC) is a pavement material that provides a porous medium to facilitate the infiltration of stormwater to the underlayers. With the increasing use of PC pavement nationwide, the mechanical properties of the material need to be established. To do so, PC specimens were prepared in various porosities, using two aggregate types. Harde ...
  • Evaluation of Roadway Reallocation Projects Analysis of BeforeandAfter Travel Speeds and Congestion Utilizing HighResolution Bus Transit Data
    Evaluation of Roadway Reallocation Projects: Analysis of Before-and-After Travel Speeds and Congestion Utilizing High-Resolution Bus Transit Data
    Figliozzi, Miguel ;
    Glick, Travis B.
    2017-11-01 | PDF
    The traditional process of identifying corridors for road diet improvements involves selecting potential corridors (mostly based on identifying fourlane roads) and conducting a traffic impact analysis of proposed changes on a selected roadway before implementing changes. The evaluation of roadway reallocation projects should include the analysis of ...
  • Using Naturalistic Data to Develop Simulator Scenarios
    Using Naturalistic Data to Develop Simulator Scenarios
    Gaspar, John ;
    Noyce, David A.
    2017-11-01 | PDF
    The establishment of large naturalistic driver data sets, most recently the StrategicHighway Research Program 2 (SHRP2), provides unique opportunities to observe driverbehavior under real-world conditions. In order to better understand the relationshipbetween simulation and naturalistic driving, it is becoming increasingly important to develop simu ...
  • InPlace Recycling and Reclamation of Asphaltic Concrete Pavements in Kentucky
    In-Place Recycling and Reclamation of Asphaltic Concrete Pavements in Kentucky
    Hunsucker, David Q. ;
    Allen, David L.
    2017-11-01 | PDF
    Full-depth reclamation has been defined by the Asphalt Recycling and Reclaiming Association as a “rehabilitation technique in which the full thickness of the asphalt pavement and a predetermined portion of the underlying material (base, subbase, and/or subgrade) is uniformly pulverized, blended and compacted to provide an upgraded, homogeneous mate ...
  • Modeling a Change in Flowrate through Detention or Additional Pavement on the Receiving Stream Final Report
    Modeling a Change in Flowrate through Detention or Additional Pavement on the Receiving Stream : Final Report
    Cleveland, Theodore G. ;
    Schwarz, Marian R.
    2017-11-01 | PDF
    The addition or removal of flow from a stream affects the water surface downstream and possibly upstream. The extent of such effects is generally determined by modeling the receiving stream. Guidance that concisely describes how far up/downstream a hydraulic model needs to extend to fully describe those effects was developed for rapid model constru ...
  • Performance Comparison of Abutment and Retaining Wall Drainage Systems Final Report and Summary
    Performance Comparison of Abutment and Retaining Wall Drainage Systems [Final Report and Summary]
    Tao, Junliang ;
    Li, Junhong
    2017-11-01 | PDF
    Control of water infiltration and providing adequate drainage are critical to the performance of retaining walls and abutment walls. Current Ohio Department of Transportation (ODOT) practice for drainage of structures specifies the use of a two-foot porous backfill with filter fabric. ODOT is seeking alternative drainage systems that are more cost- ...
    Supporting Files
  • Civil Engineering Support for the Traffic Monitoring Program June 2017 November 2017
    Civil Engineering Support for the Traffic Monitoring Program (June 2017 – November 2017)
    Moses, Ren
    2017-11-01 | PDF
    The Transportation Data and Analytics Office of the Florida Department of Transportation operates traffic monitoring sites scattered throughout the state of Florida. Consequently, the Office is faced with the continuing challenge of maintenance, sustainability, modernization of processes and equipment, and assurance of the quality of data collected ...
  • The Role of Tribes in Arizona Transportation Decision Making 20122015
    The Role of Tribes in Arizona Transportation Decision Making (2012-2015)
    Fiandaca, Peggy ;
    Thomas, Audra Koester
    2017-11-01 | PDF
    In 2011, the Arizona Department of Transportation (ADOT) initiated a study to investigate the role of Native American tribal governments in selecting and funding multimodal transportation projects. Researchers interviewed tribal representatives as well as local, state, and regional stakeholders in Arizona about multimodal transportation planning an ...
  • Impact of Transit Stop Location on Pedestrian Safety Summary
    Impact of Transit Stop Location on Pedestrian Safety [Summary]
    Plass, Mark ;
    Gregg, Rob
    2017-11-01 | PDF
    Pedestrians can be vulnerable in many roadway situations so pedestrian safety and reducing pedestrian collisions are always a high priority for the Florida Department of Transportation (FDOT). As more people use public transportation to get from home to work to shopping, pedestrian safety near bus stops is a particular interest.
  • Concrete Repair Best Practices A Series of Case Studies
    Concrete Repair Best Practices: A Series of Case Studies
    Darter, Michael
    2017-11-01 | PDF
    Concrete pavement restoration (CPR) techniques have gained greater national significance as DOT agencies attempt to further extend infrastructure service lives prior to required major rehabilitation or reconstruction. Various publications have documented design procedures and materials for CPR techniques, but less has been written about best practi ...
    Supporting Files
  • Dedolomitization and Alkali Reactions in Ohiosourced Dolstone Aggregates
    Dedolomitization and Alkali Reactions in Ohio-sourced Dolstone Aggregates
    Smeltz, Jonathan ;
    Farver, John
    2017-11-01 | PDF
    Concrete samples produced using NW-Ohio sourced aggregates were evaluated for susceptibility to degradation and premature failure due to cracks formed by the volume expansion during hydration of silica gels produced by alkali-silica reactions between alkaline Portland cement and dolostone aggregates. Expansion tests were performed on concrete prism ...
  • Development of NonProprietary Ultra High Performance Concrete Final Presentation November 2017
    Development of Non-Proprietary Ultra High Performance Concrete : Final Presentation : November, 2017
    Berry, Michael ;
    Wood, Camylle
    2017-11-01 | PDF
    Ultra-high performance concrete (UHPC) has mechanical and durability properties that far exceed those of conventional concrete. Particularly, UHPC has compressive and post-cracking tensile strengths of around 20 ksi and 0.72 ksi, respectively. Thus, elements made with UHPC are thinner/lighter than elements made with conventional concrete. The enhan ...
  • Naturalistic Bicycling Behavior Pilot Study
    Naturalistic Bicycling Behavior Pilot Study.
    Lin, Pei-Sung ;
    Kourtellis, Achilleas
    2017-11-01 | PDF
    Bicyclists experience disproportionate rates of injuries and fatalities compared to other road users. The safety for bicyclists is of particular concern in Florida, where bicyclist fatality rates were nearly triple the national average in 2015. This naturalistic bicycling behavior pilot study was conducted to collect data from actual rides of a sam ...
  • HighSpeed Rail and Local Land Development Case Studies in London and Las Vegas
    High-Speed Rail and Local Land Development : Case Studies in London and Las Vegas
    Mascoop, Daniel R. ;
    Sussman, Joseph M.
    2017-11-01 | PDF
    The efficacy of a high-speed rail system depends, in part, upon locating rail stations close to urban centers and integrating them into broader transportation networks and the urban realm. In addition, through economies of agglomeration, successful high-speed rail systems can bring wider economic benefits to regions, cities and local areas. Transit ...
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