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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 5441 - 5460 of 36958 results
  • Best Practices for Patching Composite Pavements
    Best Practices for Patching Composite Pavements
    McDaniel, Rebecca S.
    2020-01-01 | PDF
    Concrete and composite (asphalt over concrete) pavement distress frequently occurs in the vicinity of joints or cracks in the concrete slabs. Water can enter into the pavement structure at these locations, leading to concrete deterioration and loss of subgrade support. Permanently patching these weakened areas can extend the pavement life considera ...
  • Acoustic Imaging System
    Acoustic Imaging System
    Todsen, Michael
    2020-01-01 | PDF
    The inspection of bridges is an important component in maintaining a safe and efficient highway system. Portions of bridges underwater can be difficult to inspect due to lack of visibility and accessibility. Traditionally underwater inspections are performed using commercial diving operations. This requires specially trained individuals and the app ...
  • Monitoring of InService Geosynthetic Reinforced Soil GRS Bridge Abutments in Louisiana
    Monitoring of In-Service Geosynthetic Reinforced Soil (GRS) Bridge Abutments in Louisiana
    Abu-Farsakh, Murad ;
    Ardah, Allam
    2020-01-01 | PDF
    The Federal Highway Administration (FHWA) has been promoting the Geosynthetic Reinforced Soil Integrated Bridge System (GRS-IBS) technology for bridge abutments through the Every Day Counts (EDC) initiative. To realize the potential benefits of using GRS-IBS abutments in Louisiana, the Department of Transportation and Development (DOTD) built GRS-I ...
  • Integrated and DataDriven Transportation Infrastructure Management through Consideration of Life Cycle Costs and Environmental Impacts
    Integrated and Data-Driven Transportation Infrastructure Management through Consideration of Life Cycle Costs and Environmental Impacts
    Saboori, Arash
    2020-01-01 | PDF
    The main goal of this dissertation was to develop frameworks, quantitative models, and databases needed to support data-driven, informed, and integrated decision-making in managing the vast transportation infrastructure in California. Such a management system was envisioned to consider both costs and environmental impacts of management decisions, b ...
  • Division of Engineering Research OnCall Services Task 4 Load Rating of the CombsHehl Stringers Under Permit Loads
    Division of Engineering Research On-Call Services: Task 4: Load Rating of the Combs-Hehl Stringers Under Permit Loads
    Swanson, James A. ;
    Rassati, Gian Andrea
    2020-01-01 | PDF
    The Combs-Hehl Bridge is a series of structures over the Ohio River near Cincinnati spanning between Ohio on the east end and Kentucky on the west end. The overall bridge consists of four approach spans on the Kentucky side of the river (spans 1- 4), two main truss spans over the river, (spans 5 and 6), and four approach spans on the Ohio side of t ...
  • Developing an Adaptive Strategy for Connected EcoDriving Under Uncertain Traffic and Signal Conditions
    Developing an Adaptive Strategy for Connected Eco-Driving Under Uncertain Traffic and Signal Conditions
    Hao, Peng ;
    Wei, Zhensong
    2020-01-01 | PDF
    The Eco-Approach and Departure (EAD) application has been proved to be environmentally efficient for a Connected and Automated Vehicles (CAVs) system. In the real-world traffic, traffic conditions and signal timings are usually dynamic and uncertain due to mixed vehicle types, various driving behaviors and limited sensing range, which is challengin ...
  • Transportation Planning with Floods Phase II
    Transportation Planning with Floods – Phase II
    Campbell, Ann M ;
    Demir, Ibrahim
    2020-01-01 | PDF
    In the first year of this project, our team was able to develop a good understanding of how floods impact travel times and roads in Iowa. The analysis allows us to understand what areas will be more or less accessible after floods, which can help in making decisions for establishing evacuation centers and routing people outside the flood zone. We d ...
  • Influence of Casting Conditions on Durability and Structural Performance of HPCAR Changes in Workability and AirVoid System of Concrete Due to Pumping
    Influence of Casting Conditions on Durability and Structural Performance of HPC-AR: Changes in Workability and Air-Void System of Concrete Due to Pumping
    Feys, Dimitri ;
    Riding, Kyle A
    2020-01-01 | PDF
    This report summarizes the research performed on the influence of pumping operations on the changes in workability, rheology, air content, air-void system, freeze-thaw and scaling resistance of self-consolidating concrete (SCC). This project is a collaboration between the RE-CAST Tier-1 UTC the ACI Foundation, the Kansas State University (through f ...
  • Weather Event Reconstruction and Analysis Tool
    Weather Event Reconstruction and Analysis Tool
    Sturges, Leigh ;
    Holts, Mike
    2020-01-01 | PDF
    The Clear Roads research consortium requested a tool to help transportation agencies more quickly and easily reconstruct winter weather events by drawing from data sources that cover the entire United States. The goals were to help agencies better understand the development and outcomes of hazardous weather events, react appropriately to them in th ...
  • HighVolume Recycled Materials for Sustainable Pavement Construction
    High-Volume Recycled Materials for Sustainable Pavement Construction
    Volz, Jeffery S. ;
    Hartell, Julie Ann
    2020-01-01 | PDF
    Concrete production uses a considerable amount of non-renewable natural resources and generates a significant amount of greenhouse gases. To obtain a more sustainable solution requires examining the two main components of concrete – aggregates and cement. Recycling concrete as aggregate for new concrete reduces construction waste, diverts material ...
  • Performance of FiberReinforced SelfConsolidating Concrete for Repair of Bridge SubStructures and Fiber Reinforced Super Workable Concrete for Infrastructure Construction Volume III
    Performance of Fiber-Reinforced Self-Consolidating Concrete for Repair of Bridge Sub-Structures and Fiber Reinforced Super Workable Concrete for Infrastructure Construction [Volume III]
    Abdulhameed, Haider ;
    Nassif, Hani
    2020-01-01 | PDF
    The main objectives of the project are: 1) Develop mix design(s) and examine fresh and hardened properties of SCC and FR-SCC mixes using two types of fibers and varying the proportion, 2) Investigate the compatibility and bond strength of FR-SCC as a repair material and select the mixes that yield the best performance and 3) Evaluate the structural ...
  • Investigation On Thixotropy Of VibrationFree Concrete Mixtures Intended For Rapid Pavement Construction Volume II
    Investigation On Thixotropy Of Vibration-Free Concrete Mixtures Intended For Rapid Pavement Construction [Volume II]
    Feys, Dimitri ;
    Lunkad, Piyush Rajendra
    2020-01-01 | PDF
    This report discusses the advances and setbacks encountered when attempting to develop a vibration-free, selfconsolidating concrete for slipform applications. Such concrete would have significant advantages compared to conventional slipforming, as vibration would not be necessary. All negative aspects of incorrect vibration, such as inadequate air ...
  • Improving Inventory of and Investment in Bicycle and Pedestrian Facilities Through Targeted Public Outreach
    Improving Inventory of and Investment in Bicycle and Pedestrian Facilities Through Targeted Public Outreach
    Zhu, Shanjiang ;
    Mardan, Atabak
    2020-01-01 | PDF
    The Virginia Department of Transportation (VDOT) is committed to providing and maintaining transportation infrastructure for a transportation system of multiple modes, including bicycling and walking. A complete and well-maintained bicycle and pedestrian facility inventory is critical for that mission. Given the large number of bicycle and pedestri ...
  • Domestic Airline Fares Consumer Report Third Quarter 2019 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: Third Quarter 2019 Passenger and Fare Information
    United States. Department of Transportation
    2020-01-01 | Domestic Airline Fares Consumer Report | PDF
    Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric ...
  • Evaluation of HeadLight An EConstruction Inspection Technology
    Evaluation of HeadLight: An E-Construction Inspection Technology
    Rupnow, Tyson D. ;
    Coco, Mary Leah
    2020-01-01 | PDF
    Traditionally, DOTD has relied on a primarily paper-based process for field data collection. Mobile technology (defined as hardware and software that can be used in concert to allow integrated data collection, access to project-related information, and real-time communication capabilities) continues to improve and become more affordable. This resea ...
  • Improving Freeway Crash Prediction Models Using Disaggregate Flow State Information
    Improving Freeway Crash Prediction Models Using Disaggregate Flow State Information
    Dutta, Nancy ;
    Fontaine, Michael D
    2020-01-01 | PDF
    Crash analysis methods typically use annual average daily traffic as an exposure measure, which can be too aggregate to capture the safety effects of variations in traffic flow and operations that occur throughout the day. Flow characteristics such as variation in speed and level of congestion play a significant role in crash occurrence and are not ...
  • Concrete Box Beam Risk Assessment and Mitigation Volume 2Evaluation and Structural Behavior
    Concrete Box Beam Risk Assessment and Mitigation: Volume 2—Evaluation and Structural Behavior
    Frosch, Robert J. ;
    Williams, Christopher S
    2020-01-01 | PDF
    Adjacent box beam bridges have a history of poor long-term performance including premature deterioration and failures. Leaking joints between box beams allow chloride-laden water to migrate through the superstructure and initiate corrosion. The nature of this deterioration leads to uncertainty of the extent and effect of deterioration on structural ...
  • Application of VFC Mixtures in Rapid Pavement Construction
    Application of VFC Mixtures in Rapid Pavement Construction
    Shin, Alex Hak-Chul
    2020-01-01 | PDF
    The experimental work attesting the validity of the proposed mix design procedure was performed in both fresh and hardened states via a series of VFC (Vibration Free Concrete) mixes provided by other researcher in separate project. The test mixes were found to meet the necessary self-compacting and the compressive strength criteria, thus fully vali ...
  • How Does Charging Network Design Affect Electric Vehicle Adoption
    How Does Charging Network Design Affect Electric Vehicle Adoption?
    Khaloei, Moein ;
    MacKenzie, Don
    2020-01-01 | PDF
    The used car market is a critical element of the mass adoption of electric vehicles (EVs). However, most previous studies on EV adoption have focused only on new car markets. This report examines and compares the effects of charging infrastructure characteristics on preferences for electric vehicles among both new and used car buyers. This study us ...
  • Large Truck Crash Analysis for Freight Mobility and Safety Enhancement in Florida Summary
    Large Truck Crash Analysis for Freight Mobility and Safety Enhancement in Florida [Summary]
    Jin, Xia ;
    Bejleri, Ilir
    2020-01-01 | PDF
    Trucks have been a critical link in the delivery of U.S. goods for over a hundred years. Whether carrying freight between cities or distributing freight delivered by trains, planes, or ships, trucks are moving day and night. With Florida’s large population and very active ports, semis are common on Florida highways. Unfortunately, with so many vehi ...
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