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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 2101 - 2120 of 36114 results
  • Central Plains Grain Farm Truck Fleet Marketing Patterns
    Central Plains Grain Farm Truck Fleet & Marketing Patterns
    Dybing, Alan ;
    Vachal, Kimberly
    2023-04-01 | PDF
    A survey of farm operators in the Central Plains Region, including Illinois, Indiana, Iowa, Kansas, and Nebraska, was conducted to gather information about transportation of crops, the inventory and characteristics of farmer-owned truck fleets, and on-farm storage capacity. The objective of the study is to provide information about the farm truck i ...
  • Field Demonstration of PostConsumer Waste Plastics and Ground Tire Rubber in Columbia Missouri
    Field Demonstration of Post-Consumer Waste Plastics and Ground Tire Rubber in Columbia, Missouri
    Buttlar, William G. ;
    Rath, Punyaslok
    2023-04-01 | PDF
    Research has shown that asphalt pavements can serve as a destination for some of the major streams of waste materials around the globe, such as scrap tires and plastics. Heightened restrictions imposed by China in terms of waste stream contamination in 2018has catalyzed research on incorporating post-consumer recycled (PCR) plastics into asphalt pa ...
  • LRFD Procedure for Piles with Pilot Hole in Rock
    LRFD Procedure for Piles with Pilot Hole in Rock
    Nam, Soonkie ;
    Yang, Xiaoming
    2023-04-01 | PDF
    A pile driven into the ground gets its bearing capacity from skin friction along the pile surface as well as from end resistance at the toe. The load transfer mechanism determines how much load is carried by the shaft and by the toe. In Georgia, when a hard/dense layer exists in the pile length or the vibration/noise during the driving causes secon ...
  • Side Impact Guards for Combination TruckTrailers CostBenefit Analysis
    Side Impact Guards for Combination Truck-Trailers: Cost-Benefit Analysis
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2023-04-01 | National Transportation Statistics (NTS) | PDF
    This analysis presents the benefits and costs of requiring trailers of combination trucks (CTs) or articulated trucks consisting of a tractor unit and one or more attached trailers to be equipped with side impact guards to mitigate injuries and fatalities resulting from side-underride crashes involving CTs and light passenger vehicles (LPVs). LPVs ...
  • Incorporating Variability in KYTC Planning and Project Development
    Incorporating Variability in KYTC Planning and Project Development
    Souleyrette, Reginald ;
    Wang, Teng
    2023-04-01 | PDF
    Transportation planning and design decisions are typically made using point estimates of traffic and safety measures. This report addresses the uncertainty of data used to make these decisions. It focuses on two data elements — project safety ratings and volume estimates from traffic counts. For safety ratings, the Kentucky Transportation Cabinet’s ...
  • Reducing the Environmental Impact of Road Construction
    Reducing the Environmental Impact of Road Construction
    McLaughlin, Richard A. ;
    Heitman, Joshua L
    2023-04-01 | PDF
    Construction of roads exposes large areas of soil which can lead to high erosion rates. Current best management practices are good at keeping larger sized particles on-site, but smaller particles still remain a problem for construction site stormwater discharges. Turbid water leaving construction sites can have detrimental impacts for the surroundi ...
  • Understanding PostCOVID Safety Concerns toward the Use of Transit and Shared Mobility in Greater Minnesota
    Understanding Post-COVID Safety Concerns toward the Use of Transit and Shared Mobility in Greater Minnesota
    Fan, Yingling ;
    Qian, Xinyi
    2023-04-01 | PDF
    This study investigates the perceived safety risks and barriers that might prevent transit and shared mobility services from attracting post-COVID riders in Greater Minnesota. It includes an online survey of Greater Minnesota residents to understand their COVID-related safety concerns and their preferences and perceptions toward existing and potent ...
  • Exploring a StateTribal Partnership to Advance Energy Goals
    Exploring a State-Tribal Partnership to Advance Energy Goals
    Chan, Gabriel
    2023-04-01 | PDF
    The Red Lake Nation is exploring the development of a solar project on tribal land. MnDOT has an opportunity to enter into a virtual power purchase agreement (VPPA) with the Red Lake Nation for the purchase of solar electricity. A VPPA is a unique contracting method in which the tribe would develop the project, produce the electricity and sell it i ...
  • Characterization of Soil and Rock for Transportation Infrastructure Using Seismic Methods in Wyoming Data Management Plan
    Characterization of Soil and Rock for Transportation Infrastructure Using Seismic Methods in Wyoming [Data Management Plan]
    Griffiths, Shawn C. ;
    Poudal, Rishav
    2023-03-31 | PDF
    Perform seismic testing at nine sites throughout Wyoming and attempt to correlate seismic data with pile driving records, rock strength, and depth of transitional material.
  • Adaption of 3D Scanning Technology for High Precision Bridge Inspection
    Adaption of 3D Scanning Technology for High Precision Bridge Inspection
    Hain, Alexandra ;
    Zaghi, Arash Esmaili
    2023-03-31 | PDF
    Corrosion at beam ends is one of the most widespread causes of damage in steel bridges. Accurate determination of the level of section loss due to corrosion damage is critical for estimating the bearing capacity and load rating of a bridge. Current evaluation methods are labor intensive and dependent on subjective assessments by inspectors. Unique ...
  • Establishment of Wildflower Islands to Enhance Roadside Health Ecological Value and Aesthetics Phase II
    Establishment of Wildflower Islands to Enhance Roadside Health, Ecological Value, and Aesthetics Phase II
    Ebbers, Jackson ;
    Hillhouse, Heidi
    2023-03-31 | PDF
    Roadsides play an ever-increasing role in sustaining biodiversity. In 2020, we launched a project on backslopes along Highways 2 and 77 evaluating seeding and mowing treatments to enhance beneficial forbs including milkweed (Asclepias spp.) species. Analyses showed that seeding increased forb diversity, total forb cover, and floristic quality. Howe ...
  • D1 Flex Beam Field Instrumentation Load Testing of Innovative Bridge Design
    D-1 Flex Beam Field Instrumentation & Load Testing of Innovative Bridge Design
    Gonzalez, Bryan ;
    Hodgson, Ian
    2023-03-31 | PDF
    This report presents a study of an innovative superstructure system, termed Flex Beam, for short-span highway bridge applications. The system is comprised of inverted steel tee sections embedded in a concrete deck. An innovative mechanism for interface shear transfer between steel and concrete is provided by transverse deck reinforcement bars which ...
  • Develop a Study for Geosynthetic Materials for Use in Reducing Pavement Section Thickness
    Develop a Study for Geosynthetic Materials for Use in Reducing Pavement Section Thickness
    Rodriguez, Julissa J. Larios ;
    Hajj, Elie Y
    2023-03-24 | PDF
    Geosynthetics have been used to reinforce aggregate base courses to increase the structural support from the base to the pavement structure. This project aims to develop a study framework to evaluate and quantify the structural benefits under Nevada conditions. To achieve this objective, a five-stage research plan was developed to support a control ...
  • Continuation of Carbon Nanotubes Additives for Structural and Highway Concrete
    Continuation of Carbon Nanotubes Additives for Structural and Highway Concrete
    Sachs, Steven G ;
    Sun, Zhe
    2023-03-15 | PDF
    The purpose of this project was to evaluate the performance of carbon nanotube (CNT)-reinforced concrete. Carbon nanotubes have exceptional mechanical properties and small scales. Combining them with composite material enables engineers to further modify material microstructure. Carbon nanotubes have been used extensively in modifying cement proper ...
  • Integrating Road Weather Technology Data in Highway Operations
    Integrating Road Weather Technology Data in Highway Operations
    Franz, Mark L. ;
    Pack, Michael L.
    2023-03-10 | PDF
    Inclement weather can significantly impact the performance of any transportation system, including roadways. Effective roadway operations and maintenance requires quality weather data to estimate real-time and near-future road conditions. While there are several sources of such data such as radar, Road Weather Information Systems (RWIS), and Mobile ...
  • Aerial Infrared Scanning of Bridge Decks for Detecting and Mapping Delaminations
    Aerial Infrared Scanning of Bridge Decks for Detecting and Mapping Delaminations
    Carmichael, Adam ;
    Bates, Spencer
    2023-03-02 | PDF
    The objective of this project was to demonstrate and evaluate a highly efficient and economical method for evaluation of the condition of bridge decks in Alaska. The method, Aerial Infrared Thermography (Aerial IR), implements traditional infrared thermography from a fixed-wing aircraft using high resolution infrared and visual cameras. To address ...
  • Freight Companies Can Share Assets to Achieve Cost and Emission Reductions and Transition to Zero Emission Vehicles Policy Brief
    Freight Companies Can Share Assets to Achieve Cost and Emission Reductions and Transition to Zero Emission Vehicles [Policy Brief]
    Jaller, Miguel ;
    Otero, Carlos
    2023-03-01 | PDF
    Researchers at the University of California, Davis developed a logistics decision-support tool that facilitates the joint routing of pick-ups and deliveries for cooperating entities to reduce environmental impacts and transport costs. The researchers implemented the tool in several hypothetical case studies to better understand the impact of joint ...
  • Evaluation of Driveway Assistance Devices in Signalized Work Zones Fact Sheet
    Evaluation of Driveway Assistance Devices in Signalized Work Zones [Fact Sheet]
    McAvoy, Deborah S. ;
    Naik, Bhaven
    2023-03-01 | PDF
    The overall goal of this research project is to evaluate performance of the DAD devices in comparison to temporary traffic signal devices and, based on the findings, provide recommendations to ODOT on their safety, effectiveness, and cost-efficiency for adoption in signalized work zones.
  • Qualitative and Quantitative Analysis to Advance Transportation
    Qualitative and Quantitative Analysis to Advance Transportation
    Elgart, Zachary ;
    Hansen, Todd
    2023-03-01 | PDF
    Measuring equity in transportation is vitally important to ensure that the transportation network serves the entire community without introducing barriers to access. However, not all methods for assessing transportation equity produce the same results or are appropriate for all scenarios—the analysis methods used should be selected to produce the h ...
  • Uncovering the Root Causes of Truck Rollover Crashes on Ramps
    Uncovering the Root Causes of Truck Rollover Crashes on Ramps
    Xie, Yuanchang ;
    Liu, Benyuan (Ben)
    2023-03-01 | PDF
    Highway ramps are hotspots of truck rollover crashes. Such crashes often block the entire ramp and cause severe congestion. Understanding the major causes of ramp truck rollovers is critical for developing effective countermeasures. This research utilizes drones to collect ramp traffic videos at seven high-risk ramps and develops an Oriented Mask-R ...
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