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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 2421 - 2440 of 36114 results
  • NonMotorist Fatalities A Deep Dive
    Non-Motorist Fatalities: A Deep Dive
    Burbidge, Shaunna K. ;
    Azra, Nuzhat
    2022-11-01 | PDF
    Non-motorist fatalities pose a serious concern to traffic safety initiatives within the state of Utah. Past research has examined the characteristics associated with fatal pedestrian crashes in depth, however, considerably less study has been done to understand the contextual factors surrounding these incidents. Pedestrian crashes may be influenced ...
  • Landslide Monitoring Methods Application of Existing Technologies to LongTermand Realtime Monitoring of Slope Movements
    Landslide Monitoring Methods: Application of Existing Technologies to Long-Termand Real-time Monitoring of Slope Movements
    Mines, Aine E ;
    Beckstrand, Darren L.
    2022-11-01 | PDF
    Various landslide monitoring techniques were applied concurrently to a known cut-slope landslide and a previously unknown fill slope failure, both on the Ozark Mountain Highroad (Missouri Route 76) near Branson, Missouri. Both subsurface and drone-based monitoring techniques were employed so that the strengths and weaknesses of the various monitori ...
  • Improved Permafrost Protection Using Air Convection and Ventilated Shoulder Cooling Systems
    Improved Permafrost Protection Using Air Convection and Ventilated Shoulder Cooling Systems
    Goering, Douglas J.
    2022-11-01 | PDF
    This report focuses on the effectiveness of air convection embankments (ACE) and ventilated shoulder (VS) cooling systems designed to cool foundation soils and preserve permafrost beneath roadway embankments. The four main sections of the report include a literature review, an analysis of field data from the Thompson Drive Experimental Feature near ...
  • Economic Effects of Complete Streets Projects on Minnesotas Main Streets
    Economic Effects of Complete Streets Projects on Minnesota’s Main Streets
    Tupper, Nissa ;
    Fonseca-Sarmiento, Camila
    2022-11-01 | PDF
    The goal of this project was to investigate the economic impacts of Complete Streets highway reconstruction projects on small cities and develop evaluation metrics to assess and communicate these impacts.
  • Efficient and Safe Removal Debris Disposal of Ash Trees Killed by Emerald Ash Borer Fact Sheet
    Efficient and Safe Removal & Debris Disposal of Ash Trees Killed by Emerald Ash Borer [Fact Sheet]
    Daniels, Cheryl ;
    Burns, Ana
    2022-11-01 | PDF
    As emerald ash borer infestations have spread throughout Ohio, standing dead ash trees are creating challenges for Ohio Department of Transportation “ODOT”. ODOT has become overwhelmed keeping up with the volume of dead trees that potentially pose hazards and need to be removed. Davey Resource Group, Inc., worked with ODOT to develop an improved pr ...
  • Investigation of the Impact of Milling and Construction on the Bond Strength of Remaining Thin Scab Layers
    Investigation of the Impact of Milling and Construction on the Bond Strength of Remaining Thin (Scab) Layers
    Zou, Jian ;
    Roque, Reynaldo
    2022-11-01 | PDF
    Field investigation in Florida indicated that there was a potential link between weakly-bonded scabbed areas and slippage failure in the braking zones. Also, evidence from NCAT test track studies suggested that localized interface debonding might lead to surface cracking under free-rolling traffic. The primary objective of this research was to dete ...
  • Identify Sources and Risks on Cybersecurity for Connected Vehicle Infrastructure Summary
    Identify Sources and Risks on Cybersecurity for Connected Vehicle Infrastructure [Summary]
    Lin, Pei-Sung ;
    Arasteh, Megan
    2022-11-01 | PDF
    The transportation industry continues to adopt new technologies, and transportation systems are becoming increasingly connected. One of the latest innovations is the development and deployment of Connected Vehicles (CVs). CVs are vehicles equipped with a broad range of technologies that enable them to communicate with external devices such as other ...
  • Efficient and Safe Removal Debris Disposal of Ash Trees Killed by Emerald Ash Borer
    Efficient and Safe Removal & Debris Disposal of Ash Trees Killed by Emerald Ash Borer
    Daniels, Cheryl ;
    Burns, Ana
    2022-11-01 | PDF
    As emerald ash borer infestations have spread throughout Ohio, standing dead ash trees are creating challenges for Ohio Department of Transportation “ODOT”. ODOT has become overwhelmed keeping up with the volume of dead trees that potentially pose hazards and need to be removed. Davey Resource Group, Inc., worked with ODOT to develop an improved pr ...
  • Rapid Pothole Repair in Concrete Bridge Decks
    Rapid Pothole Repair in Concrete Bridge Decks
    Peiris, Abheetha ;
    Harik, Issam E.
    2022-11-01 | PDF
    Using traditional methods to repair potholes in reinforced concrete (RC) bridge decks is time-consuming and requires significant manpower and equipment. However, commercially available epoxies and similar materials provide a repair option that does not require saw cutting the deck around the pothole, concrete removal, and replacement. Researchers l ...
    Supporting Files
  • Updating Load Ratings for Shingle Creek SlabSpan Bridges Technical Summary
    Updating Load Ratings for Shingle Creek Slab-Span Bridges [Technical Summary]
    Gao, Yihong ;
    Dymond, Ben
    2022-11-01 | PDF
    The goal of this project was to investigate three concrete slab-span bridges over Shingle Creek near Brooklyn Center, Minnesota, and conduct a detailed analysis of load distribution to assess whether current calculated load ratings reflect actual bridge behavior.
  • CDOT 2D Quick Checks Statewide Initiative
    CDOT 2D Quick Checks Statewide Initiative
    Wegren, Kalli ;
    Varrella, Brian
    2022-11-01 | PDF
    The 2D Quick Check Statewide Initiative created a process where the Colorado Department of Transportation (CDOT) design projects are value engineered to improve safety, enhance efficiency, and reduce material costs early in the project delivery workflow. CDOT partnered with six consultants to develop 46 2D “Quick Check” (2dQC) models in 2021. Over ...
  • DesignBuild Pilot Program Evaluation
    Design-Build Pilot Program Evaluation
    Qin, Xiao ;
    Gottlieb, Mark
    2022-11-01 | PDF
    The purpose of this project was to evaluate the Wisconsin Department of Transportation (WisDOT) pilot program for design-build project delivery. Under legislation adopted in 2019, WisDOT was authorized to award up to six highway or bridge projects under one of three delivery methods: low-bid design build, best-value design build, or fixed-price des ...
  • Develop Bridge WeighinMotion Approach to Measure Live Loads on Texas Highways Summary Report
    Develop Bridge Weigh-in-Motion Approach to Measure Live Loads on Texas Highways: Summary Report
    Yarnold, Matthew ;
    Shi, Shengyi
    2022-10-31 | PDF
    This project realized these advantages through the development of a B-WIM system (Figure 1) that included extensive experimental testing followed by field validation on in-service bridges. In addition, the project developed an approach to identify bridge parameters from the B-WIM data, such as distribution factors and composite action, which were u ...
  • Modeling the Dynamic Modulus of Asphalt Mixtures Using SingleValue Test Results Phase I Initial Relation With Cracking Tolerance Index
    Modeling the Dynamic Modulus of Asphalt Mixtures Using Single-Value Test Results, Phase I: Initial Relation With Cracking Tolerance Index
    Romero, Pedro ;
    VanFrank, Kevin
    2022-10-31 | PDF
    This report documents the effort to develop a practical relation between the cracking tolerance index and portions of the dynamic modulus curves of asphalt mixtures. A review of practices used to create asphalt mixtures’ dynamic modulus master curves, based on NCHRP reports and other relevant literature, indicates that the dynamic modulus used as i ...
  • Before Study Evaluation of Interstate 4 I4 Floridas Regional Advanced Mobility Elements FRAME Project Before Analysis
    Before Study Evaluation of Interstate 4 (I-4) Florida’s Regional Advanced Mobility Elements (FRAME) Project (Before Analysis)
    Abdel-Aty, Mohamed A ;
    Islam, Zubayer
    2022-10-27 | PDF
    The primary objectives of this project were to evaluate the safety and mobility conditions along the I-4 corridor from Orlando to Tampa as a part of Interstate 4 (I-4) Florida’s Regional Advanced Mobility Elements’ (FRAME) integrated corridor management (ICM). Since UCF’s main role will be to identify safety challenges on the project corridors and ...
  • Bridge WeighinMotionan Approach to Measure Truck Loading on Texas Highways Workshop
    Bridge Weigh-in-Motion-an Approach to Measure Truck Loading on Texas Highways: Workshop
    Yarnold, Matthew ;
    Mander, John B.
    2022-10-26 | PDF
    A half-day workshop will be performed as part of this project. The purpose is to introduce Bridge Weigh-in-Motion (B-WIM) to the attendees and disseminate the findings of the study. This information can be utilized by TxDOT for possible applications of B-WIM for traffic monitoring or bridge assessment and management. The workshop will be a hybrid f ...
    Supporting Files
  • Public Education about Occupant Protection Technologies and Protecting Occupants with Disabilities
    Public Education about Occupant Protection Technologies and Protecting Occupants with Disabilities
    Jeihani, Mansoureh ;
    Javid, Ramina
    2022-10-25 | PDF
    Occupant protection is the foundation of any traffic safety program. According to National Highway Traffic Safety Administration (NHTSA) estimates, improvements in vehicle safety have helped increase the number of lives saved annually from 115 in 1960 to 27,621 in 2012. Therefore, educating drivers about advanced new technologies in vehicle occupan ...
  • Standards Updates for Single Span Prefabricated Bridges Technology Transfer Technical Brief
    Standards Updates for Single Span Prefabricated Bridges — Technology Transfer Technical Brief
    Rossbach, Phil ;
    Nelson, Al
    2022-10-15 | PDF
    Standards for Single Span Prefabricated Bridges were developed by HDR for the Iowa Department of Transportation in 2016 for the use on the county road system. These standards incorporated single span precast or precast/pretensioned concrete box beams with span lengths ranging from 30-feet to 70-feet, clear roadway widths of 24-feet and 30-feet, and ...
  • Guide to Remediate Bridge Deck Cracking
    Guide to Remediate Bridge Deck Cracking
    ElBatanouny, Mohamed K. ;
    Hawkins, Kathleen A.
    2022-10-11 | PDF
    Bridge decks are known to experience early-age cracking that occurs immediately after or within a few years of construction. Early age bridge deck cracks are undesirable because they increase deck maintenance needs, and thereby increase costs and traffic disruptions as well. To address this issue, Iowa DOT funded this study to develop a comprehensi ...
  • Microsimulation Department Assessment and Guidance
    Microsimulation: Department Assessment and Guidance
    Hadi, Mohammed ;
    Mamun, Md Mahmud Hasan
    2022-10-01 | PDF
    There is an increasing recognition of the need for additional guidance for utilizing simulation tools, considering the increasing complexity of the transportation system, the interactions of several factors in impacting system performance, and the increasing sophistication of strategies, technologies, and applications considered to increase system ...
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