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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 36151 results
  • Financing the Future Examining the Fiscal Landscape of California Public Transit in the Wake of the Pandemic
    Financing the Future: Examining the Fiscal Landscape of California Public Transit in the Wake of the Pandemic
    Wasserman, Jacob L. ;
    Gahbauer, John
    2023-04-01 | PDF
    California and its regional and local governments have invested heavily in public transit over the past half-century to provide an alternative to driving, ease traffic congestion, reduce emissions, slow climate change, steer new development, and provide mobility for those without. As a result, bus service has improved and expanded, and many parts o ...
  • Snow Depth Retrieval with an Autonomous UAVMounted SoftwareDefined Radar
    Snow Depth Retrieval with an Autonomous UAV-Mounted Software-Defined Radar
    Prager, Samuel ;
    Sexstone, Graham
    2023-04-01 | PDF
    We present results from a field campaign to measure seasonal snow depth at Cameron Pass, Colorado, using a synthetic ultrawideband software-defined radar (SDRadar) implemented in commercially available Universal Software Radio Peripheral (USRP) software-defined radio hardware and flown on a small hexacopter unmanned aerial vehicle (UAV). We coheren ...
  • The Future of the Louisiana Waterways Transport System A System Analysis and Plan to Move Commerce by Water
    The Future of the Louisiana Waterways Transport System: A System Analysis and Plan to Move Commerce by Water
    Cruz, Ricardo ;
    Hird, Jonathan
    2023-04-01 | PDF
    Moving commerce by water represents 25 percent of all goods movements within the state of Louisiana and is a critical component of the multimodal transportation system in the state [1]. To be best positioned for future development and investment, the Louisiana Department of Transportation and Development's (DOTD) Office of Multimodal Commerce (OMC) ...
  • Best Practices for Historic Masonry Repair and Rehabilitation
    Best Practices for Historic Masonry Repair and Rehabilitation
    Miller, Ann B.
    2023-04-01 | PDF
    The most recently published update of the Virginia Department of Transportation’s (VDOT’s) historic bridge management plan, A Management Plan for Historic Bridges in Virginia: The 2017 Update, noted a number of special considerations regarding stone masonry on VDOT’s historic bridges (i.e., those state-owned bridges that are individually eligible f ...
  • Enhancing Managed Lanes Equity Analysis
    Enhancing Managed Lanes Equity Analysis
    Douma, Frank ;
    Fonseca-Sarmiento, Camila
    2023-04-01 | PDF
    Planning and environmental studies involving managed lanes still have difficulty determining how to effectively evaluate project alternatives from an equity perspective. To most people, “equity” is ubiquitous with income, but this is a narrow focus that limits the scope of what can be considered equity, and indeed this can be true when it comes to ...
  • Bats Use of Bridges and Culverts
    Bats Use of Bridges and Culverts
    Wetzel, Theresa ;
    Roby, Piper
    2023-04-01 | PDF
    Bats are found on every continent except Antarctica and play a crucial role in our ecosystems from pollination to pest control to seed dispersal. Although bats use natural roosts such as trees and caves, many species also use anthropogenic roosts such as buildings and transportation structures. Because of this, a growing number of transportation de ...
  • Evaluating Total Maximum Daily Load Pollutants from ADOTs Storm Sewer System Discharges
    Evaluating Total Maximum Daily Load Pollutants from ADOT’s Storm Sewer System Discharges
    Sydnor, Rebecca ;
    Garman, Jay
    2023-04-01 | PDF
    In accordance with the requirements of the Clean Water Act, discharges from municipal separate storm sewer systems (MS4s) to the waters of the U.S. are regulated for pollutants. ADOT holds an MS4 permit and is therefore responsible for the quality of water discharged from its storm sewer system. ADOT is currently named as a contributor of the pollu ...
  • StateofthePractice Review of FieldCuring Methods for Evaluating the Strength of Concrete Test Specimens
    State-of-the-Practice Review of Field-Curing Methods for Evaluating the Strength of Concrete Test Specimens
    Solanki, Pranshoo ;
    Xie, Haiyan (Sally)
    2023-04-01 | PDF
    The American Association of State Highway and Transportation Officials (AASHTO) T 23 standard provides instructions for making and curing concrete test specimens in the field. However, further research is needed to compare the strength of the field-cured specimen with the strength of the actual in-place concrete item. The purpose of this research i ...
  • Multisource Data Fusion for RealTime and Accurate Traffic Incident Detection via Predictive Analytics
    Multisource Data Fusion for Real-Time and Accurate Traffic Incident Detection via Predictive Analytics
    Stamatiadis, Polichronis ;
    Gartner, Nathan H.
    2023-04-01 | PDF
    The objectives of this study are to (1) identify data sets available to MassDOT that can be used for realtime incident detection; (2) investigate how data from different sources can be integrated to improve incident detection; and (3) develop guidance for establishing trigger points to alert Highway Operations Center (HOC) operators about incidents ...
  • Guidelines for Determining Speed Limits on Municipal Roadways
    Guidelines for Determining Speed Limits on Municipal Roadways
    Miner, Kate ;
    Arvidson, Tim
    2023-04-01 | PDF
    The issue of reducing speed limits to increase public safety is an emotional, political, and controversial topic that has been debated by safety advocates, engineers, politicians, transportation ofcials, and the public for many years. A recent statutory change has put a spotlight on the topic, necessitating a deeper look into how speed limits are e ...
  • Using Mycofiltration Treatment for Stormwater Management
    Using Mycofiltration Treatment for Stormwater Management
    Kennen, Kate ;
    Chadderton, Colin
    2023-04-01 | PDF
    Federal and State environmental regulations require transportation construction and retrofit projects to manage stormwater and improve water quality. MassDOT has legal, financial, and ecological obligations to mitigate pollution from stormwater runoff entering water bodies. Existing green and gray infrastructure in place across the Commonwealth is ...
  • Incorporating Crash Severity and Continuous Improvement of SHIFT
    Incorporating Crash Severity and Continuous Improvement of SHIFT
    Souleyrette, Reginald ;
    Tanzen, Riana
    2023-04-01 | PDF
    The Strategic Highway Investment Formula for Tomorrow (SHIFT) is the Kentucky Transportation Cabinet's data-informed approach for comparing capital improvement projects and prioritizing limited transportation funds. SHIFT 2022 incorporates advancements in methods and flexibility. This project revises the SHIFT crash data safety metric. The crash da ...
  • 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 ...
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