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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 881 - 900 of 36841 results
  • MultiDimensional Freight and Trade Capacity Analysis a Case Study on BurhanKhunjerab Route in ChinaPakistan Economic Corridor CPEC
    Multi-Dimensional Freight and Trade Capacity Analysis – a Case Study on Burhan-Khunjerab Route in China-Pakistan Economic Corridor (CPEC)
    Adeel, Muhammad ;
    Khurshid, Muhammad Bilal
    2025-03-01 | PDF
    Trade corridors are critical for fostering global economic growth, reducing transportation costs, and enhancing regional connectivity, yet increasing trade volumes have imposed significant demands on these infrastructures. This study focuses on the Burhan-Khunjerab route, a pivotal section of the China-Pakistan Economic Corridor (CPEC), which conne ...
  • Centerline Buffers on TwoLane Undivided Roadways Technical Brief
    Centerline Buffers on Two-Lane Undivided Roadways [Technical Brief]
    Texas A&M Transportation Institute
    2025-03-01 | PDF
    Research results indicate that 4-ft centerline buffers have a positive effect on reducing opposite-direction crashes on two-lane highways.
  • Risk Assessment Tool Associated with Cost
    Risk Assessment Tool (Associated with Cost)
    Shrestha, K. Joseph ;
    Uddin, Mohammad Moin
    2025-03-01 | PDF
    Computing accurate cost estimates during an early phase of project development is a challenging task because of various project factors such as change in project scope, inflation, site conditions, and market conditions. This study collects and analyzes engineers’ estimates throughout the project development to quantify the changes in estimates over ...
  • Connected and Autonomous Vehicle Readiness Action Plan
    Connected and Autonomous Vehicle Readiness Action Plan
    Toth, Chris ;
    Perry, Frank
    2025-03-01 | PDF
    In this report, the Tennessee Department of Transportation (TDOT) has developed a Connected and Automated Vehicle (CAV) Readiness Action Plan to guide the implementation, operation, and maintenance of CAV technologies at traffic signals and along roadways across the state. Through this action plan, TDOT aims to position Tennessee as a leader in CAV ...
  • Synthesis of Practices to Deter Pedestrians from Crossing Freeways Technical Brief
    Synthesis of Practices to Deter Pedestrians from Crossing Freeways [Technical Brief]
    Texas A&M Transportation Institute
    2025-03-01 | PDF
    The Texas Department of Transportation (TxDOT) has seen an increase in recent years in crashes involving pedestrians crossing freeways and other high-speed roadways. This technical brief summarizes relevant practices found through a literature review, which included a variety of research studies, practitioner interviews and surveys, and published r ...
  • Inspection of Flexible Filler Tendons Summary
    Inspection of Flexible Filler Tendons [Summary]
    Brown, Jeff R.
    2025-03-01 | PDF
    This research focused on developing an inspection protocol for post-tensioning (PT) ducts employing flexible filler materials for corrosion protection in bridge applications. Historically, cementitious grouts (CG) have been used to provide corrosion protection and bonding in PT systems. In contrast, flexible filler systems use wax or grease to main ...
  • Best Practices for Maintenance of ControlofAccess Fencing Summary
    Best Practices for Maintenance of Control-of-Access Fencing [Summary]
    Moomen, Milhan ;
    Rahman, Ashifur
    2025-03-01 | PDF
    This report examines the current practices and challenges associated with the maintenance of control-of-access (C-of-A) fencing along highways, with a particular focus on the Louisiana Department of Transportation and Development (DOTD). C-of-A fencing is an essential infrastructure component, designed to enhance the safety, security, and operation ...
  • Strategic Prioritization in Bridge Asset Maintenance through Data Driven LongTerm Asset Valuation with Additional Emphasis on Promoting GDOTs Partnerships with Counties
    Strategic Prioritization in Bridge Asset Maintenance through Data Driven Long-Term Asset Valuation with Additional Emphasis on Promoting GDOT’s Partnerships with Counties
    Geum Chorzepa, Mi ;
    Durham, Stephan A.
    2025-03-01 | PDF
    This study focuses on engaging local bridge owners through interviews and interactions, aiming to assist them in enhancing their bridge management practices, while also developing resources to support them. Key deliverables include multiple resource guides: a Non-NBI Culvert Inspection Guide, a Weather Stressors Guide, and a Supplementary Guide for ...
  • Complete Streets Means Trucks too Integrating Freight Traffic Needs with Active Transportation Planning and Policy Summary
    Complete Streets Means Trucks, too: Integrating Freight Traffic Needs with Active Transportation Planning and Policy [Summary]
    Tolford, Tara
    2025-03-01 | PDF
    The objective of this planning-level study is to analyze a range of observed and anticipated conflicts among road users; define stakeholder-identified gaps in data and guidance for Complete Streets implementation with respect to the integration of freight activities; and develop planning, policy, and design recommendations to mitigate safety and op ...
  • Development of a Worker Safety Assessment Risk Identification and Control Program for ALDOT
    Development of a Worker Safety Assessment, Risk Identification, and Control Program for ALDOT
    Zech, Wesley C. ;
    Kirby, Jason
    2025-03-01 | PDF
    This research examines the safety challenges faced by Transportation Maintenance Technicians (TMTs) at the Alabama Department of Transportation (ALDOT). By analyzing extensive injury data from 2009 to 2024, along with insights from surveys and interactions with ALDOT personnel, this effort highlights significant trends and relationships among injur ...
  • Counting Airport Operations Using Aircraft Transponder Signals andor Aircraft Automatic Dependent SurveillanceBroadcast ADSB Data Brief
    Counting Airport Operations Using Aircraft Transponder Signals and/or Aircraft Automatic Dependent Surveillance-Broadcast (ADS-B) Data [Brief]
    Yoshigoe, Kenji
    2025-03-01 | PDF
    Accurate estimation of daily and annual aircraft operations at airports is vital for various objectives, including airport planning, funding allocation, and aviation forecasts. However, obtaining precise operational data from airports without control towers has been challenging. In 2018, the Florida Department of Transportation (FDOT) published an ...
  • Coastal Flood Roadway Vulnerability Assessment
    Coastal Flood Roadway Vulnerability Assessment
    Bilskie, Matthew V ;
    Kim, S. Sonny
    2025-03-01 | PDF
    Coastal flood data and maps were developed using an ADvanced CIRCulation (ADCIRC) hydrodynamic model with resolution as fine as 30 m on the coastline. Annual exceedance probability (AEP) still water levels caused by storm surges were taken from the United States Army Corps of Engineers (USACE) South Atlantic Coastal Study’s (SACS) publicly availabl ...
  • Setting Speed Limits English Version
    Setting Speed Limits: English Version
    Texas A&M Transportation Institute
    2025-03-01 | PDF
    Posted speed limits (PSLs) are a highly complex issue involving engineering, human factors, and political and societal concerns. On a national level, recent research along with calls to change how speed limit are set, especially for city streets, have generated extensive discussion on future speed limit setting procedures. Recent Texas Department o ...
  • Leveraging Mobility Data Analytics to Inform Mobility Hub Development in Florida Brief
    Leveraging Mobility Data Analytics to Inform Mobility Hub Development in Florida [Brief]
    Yan, Xiang Jacob
    2025-03-01 | PDF
    Mobility hubs (MHs) can facilitate seamless transitions between various transportation modes, such as transit, ridehailing, and micromobility, enhancing multimodal travel and delivering socioeconomic benefits. To inform mobility hub planning and development in Florida cities and beyond, this project develops a multi-criteria, GIS-based MH site sele ...
  • Performance and Improvement of Texas Poor Boy Continuous Bridge Deck Details Final Report
    Performance and Improvement of Texas Poor Boy Continuous Bridge Deck Details: Final Report
    Birely, Anna C. ;
    Yarnold, Matthew T.
    2025-03-01 | PDF
    The majority of bridges in Texas are constructed with girders as simple spans. A simple-span deck requires expansion joints, which are sources of maintenance and durability issues. To avoid this, continuous decks, known as “poor boy joints” in Texas Department of Transportation (TxDOT) bridges, are an attractive option. These details are commonly k ...
  • Steel Bridge Coating and Recoating Warranty Requirements Brief
    Steel Bridge Coating and Recoating Warranty Requirements [Brief]
    Padilla, Felix ;
    Ault, Pete
    2025-03-01 | PDF
    The service life of steel bridge coatings in Florida is occasionally shorter than the intended design life, resulting in the need for increased maintenance painting. This project examined the value of warranty terms potentially included in painting contracts to improve the quality and durability of steel bridge coatings. The research found that the ...
  • TMA Truck Safety
    TMA Truck Safety
    Edara, Praveen K. ;
    Qing, Zhu
    2025-03-01 | PDF
    This study evaluates the effectiveness of in-vehicle safety countermeasures in reducing injury risk for TMA (Truck-Mounted Attenuator) truck occupants during collisions. With increasing incidents involving TMAs in work zones, understanding the protective impact of advanced safety features has become crucial. A review of historical TMA crash reports ...
  • TMA Truck Safety Research Summary
    TMA Truck Safety [Research Summary]
    Edara, Praveen K.
    ORCID ICON IMG
    2025-03-01 | PDF
    This study evaluates the effectiveness of in-vehicle safety countermeasures in reducing injury risk for TMA (Truck-Mounted Attenuator) truck occupants during collisions. With increasing incidents involving TMAs in work zones, understanding the protective impact of advanced safety features has become crucial. A review of historical TMA crash reports ...
  • Development of Measures for Highway Criticality Assessment
    Development of Measures for Highway Criticality Assessment
    Zhang, Xu ;
    Chen, Mei
    2025-03-01 | PDF
    Existing network criticality assessments, often biased towards heavily used highways in populous areas by incorporating traffic and sociodemographic attributes, can lead to an underestimation of the vital role of rural infrastructure. Consequently, rural highways, particularly low-volume roads, often receive less consideration despite their critica ...
  • Superabsorbent Polymer in Concrete to Improve Durability
    Superabsorbent Polymer in Concrete to Improve Durability
    Zhou, Bo ;
    Taylor, Peter
    2025-03-01 | PDF
    The main objective of this research was to explore the optimized selection of superabsorbent polymer (SAP) products as internal curing materials in concrete and to examine the effects of the use of eight selected SAPs on properties that affect concrete performance, including shrinkage, hydration, permeability, and strength. Experimental results dem ...
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