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Recent Additions
This page includes the documents that were newly added to the repository within the last 30 days.
381 - 400 of 409 results
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  • How’s That Diet Working: Performance of Virginia Road Diets
    Published Date:
    2020-04-01
    Abstract:
    In 2018, the Virginia Department of Transportation (VDOT) initiated this study to improve its understanding of past road diets in Virginia. Of interest were how road diets have been analyzed, how their performance has been quantified, how other state...
    File Type:
    Filetype[PDF - 4.96 MB]
    Added:
    03/23/2021
  • Time-Lapse Infrared Thermography Applied to Concrete Bridge Deck Inspection Surveys
    Published Date:
    2020-03-01
    Abstract:
    The Federal Highway Administration mandates that all [bridge] structures in its inventory are to be inspected every two years. Consequently, deck surveys are conducted to identify unseen damage within them. A significant number of bridges in Virginia...
    File Type:
    Filetype[PDF - 4.28 MB]
    Added:
    03/23/2021
  • Seismic Behavior of Grade 80 RC Bridge Columns – Phase 1 and Critical Bending Strain of Longitudinal Reinforcement
    Published Date:
    2020-03-01
    Abstract:
    Modern seismic design relies on the principles of capacity design wherein certain structural members are chosen as plastic hinge members. In reinforced concrete, the choice of reinforcement is crucial for desirable performance of plastic hinge member...
    File Type:
    Filetype[PDF - 15.67 MB]
    Added:
    03/23/2021
  • Laboratory Investigation of Workable and Durable Concretes for Bridge Repair
    Published Date:
    2020-06-01
    Abstract:
    Concretes for bridge repair that attained 3,000 psi compressive strength within 10 hours, 1 day, and 7 days and had high workability and durability were investigated in the laboratory. Supplementary cementitious materials (SCMs) were used in concrete...
    File Type:
    Filetype[PDF - 1.06 MB]
    Added:
    03/23/2021
  • Potential Socioeconomic Forecasts in Support of VTrans
    Published Date:
    2020-05-01
    Abstract:
    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...
    File Type:
    Filetype[PDF - 6.59 MB]
    Added:
    03/23/2021
  • Understanding Access to Grocery Stores in Food Deserts in Baltimore City
    Published Date:
    2020-07-21
    Abstract:
    As American cities have seen a change in land uses in urban areas, with stores moving to suburban areas increasing the reliance on cars, many urban areas are left with a lack of accessible quality food options. These food insecure areas, commonly kno...
    File Type:
    Filetype[PDF - 3.50 MB]
    Added:
    03/23/2021
  • Blowout Prevention System Safety Events: 2018 Annual Report: Highlights
    Published Date:
    2019-08-01
    Abstract:
    Information in this document is collected from the 2018 Annual Report: Blowout Prevention System Safety Events. The report is published by the Bureau of Transportation Statistics (BTS) and provides information on component failure events occurring du...
    File Type:
    Filetype[PDF - 673.10 KB]
    Added:
    03/23/2021
  • High-Visibility Enforcement and Seat Belt Use [Traffic Tech]
    Published Date:
    2021-03-01
    Abstract:
    High-visibility enforcement (HVE) is a traffic safety approach designed to deter unlawful behaviors and promote voluntary behavior change in accordance with traffic laws. HVE deters risky behavior by reminding motorists through communications and add...
    File Type:
    Filetype[PDF - 314.12 KB]
    Added:
    03/18/2021
  • Federal Road Charge Tax Administration Process
    Published Date:
    2020-03-01
    Abstract:
    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 discussio...
    File Type:
    Filetype[PDF - 923.52 KB]
    Added:
    03/15/2021
  • Feasibility of Using Video Image Detectors for Ramp Signal Operations and Performance Monitoring
    Published Date:
    2019-12-01
    Abstract:
    District 6 Florida Department of Transportation (FDOT) has been using both inductive loops and Sensys Networks sensors at its 22 ramp signals on I-95 in Miami-Dade County, Florida. These detectors are used to detect vehicle volumes and occupancy, but...
    File Type:
    Filetype[PDF - 4.08 MB]
    Added:
    03/15/2021
  • Noise Abatement and Performance Evaluation of a Next-Generation Diamond Grinding Test Section in Harris County
    Published Date:
    2016-09-01
    Abstract:
    This research project compared the performance of a 0.68-mile long continuously reinforced concrete pavement test section before and after receiving next-generation diamond grinding (NGDG). The test section was transversely tined and located on Loop ...
    File Type:
    Filetype[PDF - 8.76 MB]
    Added:
    03/15/2021
  • Investigation of Rural/Suburban High-Speed Multilane Roundabouts
    Published Date:
    2014-11-01
    Abstract:
    This research was focused on two issues related to multilane roundabouts on high-speed highways (speed limit 45 mph or greater) in rural and suburban areas. The first was the tradeoff between converting a traditional stop-controlled or signalized int...
    File Type:
    Filetype[PDF - 2.76 MB]
    Added:
    03/15/2021
  • Detection of Damage Precursors in Steel Components for Life-Cycle Assessments
    Published Date:
    2019-10-01
    Abstract:
    The early identification of damage of fracture-critical members is of the outmost importance in the maintenance of a safe bridge infrastructure. A new Non-Destructive Evaluation method that gives an early warning of accumulating damage is been formul...
    File Type:
    Filetype[PDF - 3.48 MB]
    Added:
    03/15/2021
  • Pilot Implementation for Preventing Incorrect Turns at Highway-Rail Grade Crossings
    Published Date:
    2019-11-01
    Abstract:
    Incorrect turns onto railroad tracks may occur if a highway-rail grade crossing is close to an intersection or a freeway on-ramp. This project aimed to evaluate three low-cost countermeasures to prevent incorrect turns onto railroad tracks: (1) elimi...
    File Type:
    Filetype[PDF - 6.74 MB]
    Added:
    03/15/2021
  • Understanding Behavioral Responses of Wildlife to Traffic to Improve Mitigation Planning
    Published Date:
    2020-02-01
    Abstract:
    Creating and maintaining sustainable transportation systems depends in part on understanding and mitigating ecological impacts. Wildlife crossing structures (WCS) are often used to mitigate impacts on wildlife populations. WCS and existing structures...
    File Type:
    Filetype[PDF - 1.37 MB]
    Added:
    03/15/2021
  • The Cost of Roadway Construction and Maintenance in New Jersey: Final Report
    Published Date:
    2019-09-01
    Abstract:
    In today’s fiscally constrained funding environment, cost efficiency in highway construction and maintenance is an important goal for transportation agencies nationwide. This research study estimated the average cost per-lane mile for roadway const...
    File Type:
    Filetype[PDF - 475.48 KB]
    Added:
    03/15/2021
  • Post-Tensioned Concrete Box-Girder Bridge Deck Replacement Analysis
    Published Date:
    2019-06-01
    Abstract:
    Issues related to the replacement of damaged bridge decks were examined in this study. Finite element analyses of four post-tensioned box-girder bridges were conducted to investigate various strategies for safe and effective deck replacement without ...
    File Type:
    Filetype[PDF - 109.69 MB]
    Added:
    03/15/2021
  • Feasibility Study of Development of Ultra-High Performance Concrete (UHPC) for Highway Bridge Applications in Nebraska
    Published Date:
    2020-01-01
    Abstract:
    Ultra-high performance concrete (UHPC) is a new class of concrete that has superior mechanical, durability, and workability properties that far exceed those of conventional concrete. To achieve these properties, a specific mix design with a very dens...
    File Type:
    Filetype[PDF - 11.59 MB]
    Added:
    03/15/2021
  • Revisiting TODs: How Subsequent Development Affects the Travel Behavior of Residents in Existing Transit-Oriented Developments [supporting datasets]
    Published Date:
    2020-05-01
    Abstract:
    Portland State University has worked with the Portland Metro regional government periodically since 2005 to survey occupants of buildings for which developers had received funding from Metro’s Transit-Oriented Development (TOD) Program. This resear...
    File Type:
    Filetype[PDF - 123.61 KB]
    Added:
    03/15/2021
  • Assessing Alternative Approaches for Conveying Automated Vehicle ‘Intentions' [supporting datasets]
    Published Date:
    2020-05-01
    Abstract:
    One of the biggest highly automated vehicle (HAV) market barriers may be a lack of user trust in the automated driving system itself. Research has shown that this lack of faith in the system primarily stems from a lack of system transparency while th...
    File Type:
    Filetype[PDF - 154.90 KB]
    Added:
    03/15/2021
381 - 400 of 409 results
20 50 results
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