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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 1681 - 1700 of 36873 results
  • BIM for Bridges and Structures Final Report
    BIM for Bridges and Structures Final Report
    Mitchell, Alexa ;
    Maier, Francesca
    2024-03-21 | PDF
    In 2017, the AASHTO Committee on Bridges and Structures (COBS), Technical Committee T-19 on Software and Technology organized the pooled fund study TPF-5(372) BIM for Bridges and Structures. The pooled fund objective was to develop a standard way of exchanging 3D models and other digital data using an open, nonproprietary format. The TPF-5(372) stu ...
    Supporting Files
  • Study and Evaluation Material Response in Hot Mix Asphalt Based on Field Instrumentation Phase 3
    Study and Evaluation Material Response in Hot Mix Asphalt Based on Field Instrumentation (Phase 3)
    Tarefder, Rafiqul A. ;
    Khan, Zafrul
    2024-03-16 | PDF
    This report documents the stress-strain responses from sensors embedded inside different layers of a pavement section on Interstate I-40, near Albuquerque, New Mexico, during the Phase 3 of this project. Pavement responses were measured under real time traffic loads and routine Falling Weight Deflectometer (FWD) test loads at various weather condit ...
  • Literature Review of IDEALCT and IDEALRT Test Methods for Balanced Mixed Design Research Project Capsule 234B
    Literature Review of IDEAL-CT and IDEAL-RT Test Methods for Balanced Mixed Design: Research Project Capsule [23–4B]
    Salari, Saman ;
    Rupnow, Tyson
    2024-03-01 | PDF
    The objective of this project is to evaluate published literature regarding the efficacy of IDEAL-CT and IDEAL-RT test methods to characterize the performance of asphalt mixtures in the field. Many agencies have used and researched these BMD methods, and reviewing their efficiency can provide the state of Louisiana with additional tools and help ag ...
  • FullScale Dynamic Wireless Power Transfer and Pilot Project Implementation
    Full-Scale Dynamic Wireless Power Transfer and Pilot Project Implementation
    Moncada, Oscar Andrés ;
    Imran, Zainab
    2024-03-01 | PDF
    Considering the challenges hindering the widespread adoption of electric vehicles (EVs) and heavy-duty electric vehicles (HDEVs), the integration of dynamic wireless power transfer (DWPT) technology into roadways has gained interest. By embedding DWPT components into pavement, electrical power can be delivered to an EV or HDEV as they are in motion ...
  • Online Instructional Tools for Motor Carriers
    Online Instructional Tools for Motor Carriers
    Howell, Brian ;
    Walton, Jennifer
    2024-03-01 | PDF
    Commercial motor carrier customers on Kentucky highways must register and pay taxes for licensing and credentialing requirements. The Kentucky Transportation Cabinet (KYTC) provides an online Motor Carrier Portal that offers information and instructions on meeting these requirements, but customers have increasingly resorted to calling into KYTC’s m ...
  • Evaluating the Potential Benefits of Implementing AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical and System Redundant Members
    Evaluating the Potential Benefits of Implementing AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical and System Redundant Members
    Connor, Robert J. ;
    Korkmaz, Cem
    2024-03-01 | PDF
    An exploratory study was conducted for some bridges in the state of Indiana that evaluated the implementation potential of the AASHTO Guide Specifications for Internal Redundancy of Mechanically-Fastened Built-Up Steel Members (IRM Guide Specification) and the AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical Memb ...
  • Literature Review and Industry Survey of Recycled Fibers from Novel and Existing Source Materials for Concrete Use
    Literature Review and Industry Survey of Recycled Fibers from Novel and Existing Source Materials for Concrete Use
    Nassiri, Somayeh ;
    Roy, Souvik
    2024-03-01 | PDF
    Research has demonstrated the multiple benefits of fibers for the early and late-age performance of concrete pavements and bridge decks. Many research studies have also shown that the expected enhancements in properties of concrete with recycled fibers could be commensurate with those of concrete reinforced with virgin fibers. However, compared wit ...
  • Investigating Implementation Potentials of Turbo Roundabouts in Nevada
    Investigating Implementation Potentials of Turbo Roundabouts in Nevada
    Dey, Kakan ;
    Naik, Bhaven
    2024-03-01 | PDF
    Turbo Roundabouts – an emergent and “new” concept in the design of roundabouts – has the potential to address the limitations experienced with the adoption of multi-lane (2x2) roundabouts. The turbo roundabout can effectively guide drivers within the roundabout by restricting lane-changing and reducing lane-change-related conflicts, which are commo ...
  • Evaluating the Potential Benefits of Implementing AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical and System Redundant Members Summary
    Evaluating the Potential Benefits of Implementing AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical and System Redundant Members [Summary]
    Connor, Robert J. ;
    Korkmaz, Cem
    2024-03-01 | PDF
    An exploratory study was conducted for some bridges in the state of Indiana that evaluated the implementation potential of the AASHTO Guide Specifications for Internal Redundancy of Mechanically-Fastened Built-Up Steel Members (IRM Guide Specification) and the AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical Memb ...
  • How Will Californias Electric Vehicle Policy Impact StateGenerated Transportation Revenues Projecting Scenarios through 2040 Summary
    How Will California’s Electric Vehicle Policy Impact State-Generated Transportation Revenues? Projecting Scenarios through 2040 [Summary]
    Agrawal, Asha Weinstein ;
    King, Hannah
    2024-03-01 | PDF
    California faces unprecedented uncertainty about how much revenue the state will raise from a package of taxes on motor fuels and annual registration fees on light-duty vehicles that was established in 2017 by Senate Bill 1 (SB 1). The SB 1 taxes are by far the largest source of revenue that the State of California generates to support maintenance, ...
  • Development of a Formalized Program for InService Inspection of Pedestrian Bridges Summary
    Development of a Formalized Program for In-Service Inspection of Pedestrian Bridges [Summary]
    Alharthi, Aedh A ;
    Connor, Robert J.
    2024-03-01 | PDF
    Currently, there are no universally accepted procedures or criteria related to the inspection of pedestrian bridges in the U.S. While some states have some criteria in place, the FHWA has no specific recommendations or requirements for such structures. However, pedestrian bridges can be very complex structures in some cases, whether by using non-re ...
  • A Survey of Universal Basic Mobility Programs and Pilots in the United States
    A Survey of Universal Basic Mobility Programs and Pilots in the United States
    Rodier, Caroline ;
    Tovar, Angelly J
    2024-03-01 | PDF
    A lack of reliable and affordable transportation exacerbates socioeconomic inequities for low-income individuals, especially people of color. Universal Basic Mobility (UBM) pilots or programs are a relatively new approach to addressing financial barriers to travel among the transport-disadvantaged. UBMs provide individuals with funds for various mo ...
  • Design of Landslide Stabilization Using the Strength Reduction Method and LRFD
    Design of Landslide Stabilization Using the Strength Reduction Method and LRFD
    Strom, Lucas O ;
    Varathungarajan, David A.
    2024-03-01 | PDF
    Current design methods for landslide stabilization with numerical modeling do not bridge the gap between the strength reduction method (SRM) and load and resistance factor design (LRFD), resulting in designers making assumptions about how LRFD design criteria (which were developed based on limit-equilibrium analyses) translate to design using numer ...
  • Traffic Records Data Quality Management Guide Update to the Model Performance Measures for State Traffic Records Systems
    Traffic Records Data Quality Management Guide: Update to the Model Performance Measures for State Traffic Records Systems
    Osbourn, C ;
    Ruiz, C
    2024-03-01 | PDF
    The Traffic Records Data Quality Management Guide builds upon the information in the NHTSA 2011 report, Model Performance Measures for State Traffic Records Systems, by describing data quality performance measurement in the context of a data quality management program. The performance measurement process enables stakeholders to quickly identify pot ...
  • Administrative Rules and Structures of Speed Safety Camera SSC Systems Transportation Research Synthesis
    Administrative Rules and Structures of Speed Safety Camera (SSC) Systems- Transportation Research Synthesis
    Moore-Ritchie, Chelsea ;
    Kienitz, Heather
    2024-03-01 | PDF
    Minnesota does not currently have legislation enabling the use of speed safety cameras (SSCs), previously referred to as automated speed enforcement (ASE). However, due to an increase in speed-related fatal crashes on Minnesota roadways and research indicating the effectiveness of SSCs (TRS 2204), there is renewed interest in passing enabling legis ...
  • Investigation of High Mast Illumination Pole Handhole Cracking Technical Summary
    Investigation of High Mast Illumination Pole Handhole Cracking [Technical Summary]
    Yount, Tristan ;
    Yu, Danqing
    2024-03-01 | PDF
    This report describes an investigation in which four poles removed from service were studied to determine potential origins and driving factors of the handhole cracking. Each pole was cut and processed so that the crack surfaces could be examined. Sub-sized Charpy V-Notch (CVN) specimens were sampled from each pole and tested to estimate the toughn ...
  • A Method of Maximum Thickness for Flexible Pavement Design
    A Method of Maximum Thickness for Flexible Pavement Design
    Gatiganti, Suri ;
    Timm, David
    2024-03-01 | PDF
    Asphalt pavement thickness design, for both new and overlay scenarios, has been evolving since the 1960’s from empirical to mechanistic-empirical design frameworks. Regardless of the design methodology, the fundamental goal of thickness design has been to determine the optimum cross-section to achieve the desired performance under the prevailing co ...
  • Electric Vehicle Fee Restructuring Transportation Research Synthesis
    Electric Vehicle Fee Restructuring - Transportation Research Synthesis
    Beattie, Alice ;
    Fordham, Damon
    2024-03-01 | PDF
    This Transportation Research Synthesis (TRS) investigates potential strategies for equitable fee structuring among motorists in Minnesota as adoption of electric vehicles (EVs) continues to accelerate. To examine funding structures that could address revenue shortfalls due to EV deployment, this TRS summarizes other states’ approaches to capturing ...
  • INDOT Project Change Orders Root Causes and Recommendations Summary
    INDOT Project Change Orders: Root Causes and Recommendations [Summary]
    Hastak, Makarand ;
    Gkritza, Konstantina
    2024-03-01 | PDF
    This study analyzed the historical trends in change orders (COs) associated with the Indiana Department of Transportation(INDOT) highway contracts. It also investigated correlations between COs and base factors (district, project type, contract type, award amount, geographical area (rural vs. urban)), and sought to understand the effect of the root ...
  • Determination of the Resistance to Motion of a Cargo Train When Driving Without a Drive
    Determination of the Resistance to Motion of a Cargo Train When Driving Without a Drive
    Sawczuk, Wojciech ;
    Kołodziejski, Sławomir
    2024-03-01 | PDF
    This study investigates the resistance forces acting on a cargo train under real operating conditions using experimental methods. By analyzing motion parameters such as speed, acceleration, and traction forces obtained through onboard measurement systems, the authors establish empirical resistance curves across various operational scenarios. The re ...
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