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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 7801 - 7820 of 36114 results
  • Assessing the Risk of Landslide on Oklahoma Highways Using LIDAR
    Assessing the Risk of Landslide on Oklahoma Highways Using LIDAR
    Shan, Yongwei ;
    Bangaru, Srikanth Sagar
    2017-08-01 | PDF
    This primary objective of this study is to develop a comprehensive workflow to guide Oklahoma DOT to apply the LIDAR technology to landslide monitoring and risk assessment on Oklahoma highways. In addition to the primary objective, this study also aims 1) to evaluate registration and vegetation algorithms on the collected data, 2) to assess the dis ...
  • Oversizeoverweight vehicle unified permitting process UPP phase I
    Oversize/overweight vehicle unified permitting process (UPP) : phase I.
    Kuehl, Renae ;
    Markman, Samantha
    2017-08-01 | PDF
    Multiple jurisdictions within Minnesota process oversize/overweight (OSOW) permits for the movement of freight on state roadways, county roads, and municipal and township streets. Movement of freight has increased in recent years to help support economic trends and construction needs. These moves often require haulers to offload from state roadways ...
  • Survey of Key Monarch Habitat Areas along Roadways in Central and North Florida
    Survey of Key Monarch Habitat Areas along Roadways in Central and North Florida
    Daniels, Jaret C.
    2017-08-01 | PDF
    Roadsides in North and Central Florida harbor a large number of milkweed populations important to the monarch butterfly. A total of 303 roadway locations had one or more plants of the target species Asclepias humistrata (pinewoods milkweed) or Asclepias tuberosa (butterflyweed). Plant densities ranged from 1 to 161 individuals per site, 40 high den ...
  • Every Day Counts Significant Impacts August 2017
    Every Day Counts - Significant Impacts: August 2017
    United States. Federal Highway Administration
    2017-08-01 | PDF
    In 2009, the Federal Highway Administration (FHWA) launched Every Day Counts (EDC) in cooperation with the American Association of State Highway and Transportation Officials (AASHTO) to speed up the delivery of highway projects and to address the challenges presented by limited budgets. EDC is a State-based model to identify and rapidly deploy prov ...
  • Project Scoping Guidebook for Metropolitan Planning Organization Transportation Projects
    Project Scoping Guidebook for Metropolitan Planning Organization Transportation Projects
    Hessami, Amir R. ;
    Sun, Dazhi
    2017-08-01 | PDF
    To obtain state and federal funding for proposed transportation projects in metropolitan areas, local governments submit project proposals to their Metropolitan Planning Organization (MPO) during the early stages of project planning. The purpose of this guidebook is to help local governments enhance the quality and accuracy of their project proposa ...
  • Skewed steel bridges part ii crossframe and connection design to ensure brace effectiveness final report
    Skewed steel bridges, part ii : cross-frame and connection design to ensure brace effectiveness : final report.
    Zhou, James ;
    Bennett, Caroline
    2017-08-01 | PDF
    Skewed bridges in Kansas are often designed such that the cross-frames are carried parallel to the skew angle up to 40°, while many other states place cross-frames perpendicular to the girder for skew angles greater than 20°. Skewed-parallel cross-frames are longer and may require different connections than cross-frames oriented perpendicular to th ...
  • A New Look at the Environmental Assessment of Logistics Sprawl Part 1 The Environmental Impact of Urban Road Freight A Modeling Exercise for the Paris Region Brief
    A New Look at the Environmental Assessment of Logistics Sprawl Part 1: The Environmental Impact of Urban Road Freight: A Modeling Exercise for the Paris Region [Brief]
    Coulombel, Nicolas ;
    Dablanc, Laetitia
    2017-08-01 | PDF
    This research aims at improving knowledge on the environmental impacts of urban road freight (URF). It questions the gap between common beliefs about the environmental impact of URF and its specific empirical measurement.
  • Performance Evaluation of Strong Post Doublefaced Wbeam Guardrail and Strong Post Doublefaced ThrieBeam Guardrail at MASH Test Level 4 TL4 and Test Level 5 TL5 Conditions
    Performance Evaluation of Strong Post Double-faced W-beam Guardrail and Strong Post Double-faced Thrie-Beam Guardrail at MASH Test Level 4 (TL-4) and Test Level 5 (TL-5) Conditions
    Fang, Howie ;
    Gutowski, Matthew
    2017-08-01 | PDF
    This report summarizes the research efforts of using finite element modeling and simulations to evaluate the performance of North Carolina Department of Transportation (NCDOT) double-faced W-beam and Thrie-beam guardrails at different installation heights and under Manual for Assessing Safety Hardware (MASH) Test Level 4 (TL-4) and Test Level 5 (TL ...
  • Implementing the Routine Computation and Use of Roadway Performance Measures within WSDOT
    Implementing the Routine Computation and Use of Roadway Performance Measures within WSDOT
    Hallenbeck, Mark E. ;
    Ishimaru, John
    2017-08-01 | PDF
    The Washington State Department of Transportation (WSDOT) is one of the nation's leaders in calculating and using reliability statistics for urban freeways. The Department currently uses reliability measures for decision making for urban freeways-where it has applicable data- and as input to analyses that are part of major investment studies and ot ...
  • Repairs with selfconsolidating concrete and galvanic anodes to extend bridge life
    Repairs with self-consolidating concrete and galvanic anodes to extend bridge life.
    Ozyildirim, H. Celik ;
    Sharp, Stephen R.
    2017-08-01 | PDF
    Historically, repairs of substructure elements that contain vertical and overhead sections have used either shotcrete or a conventional Virginia Department of Transportation (VDOT) Class A3 (3,000 psi) or Class A4 (4,000 psi) concrete. This study investigated the use of self-consolidating concrete (SCC), which has high flow rates, bonds well, has l ...
  • A Historical Review of Training Requirements for Unmanned Aircraft Systems Small Unmanned Aircraft Systems and Manned Operations 19972014
    A Historical Review of Training Requirements for Unmanned Aircraft Systems, Small Unmanned Aircraft Systems, and Manned Operations (1997-2014)
    Gildea, Kevin M. ;
    Williams, Kevin W.
    2017-08-01 | PDF
    There are several mature Unmanned Aircraft System (UAS) and Small Unmanned Aircraft System(sUAS) training programs available for analysis. Many of these programs were developed by the various branches with the U.S. Department of Defense (DoD) in conjunction with UAS manufacturers. The structures of the existing training programs guided the creation ...
  • Phased array ultrasonic steel corrosion mapping for bridges and ancillary structures
    Phased array ultrasonic steel corrosion mapping for bridges and ancillary structures.
    Lovelace, Barritt ;
    Wells, Jennifer
    2017-08-01 | PDF
    Steel corrosion on bridges and ancillary structures due to environmental effects and deicing chemicals is a serious problem for Minnesota's infrastructure. The ability to detect, locate, and measure corrosion is an important aspect of structure inspection. Accurate thickness measurements and corrosion mapping are essential for determining load capa ...
  • Evaluating vegetation management practices for woody and herbaceous vegetation phase III final report
    Evaluating vegetation management practices for woody and herbaceous vegetation : phase III : final report.
    Gulick, Jennifer ;
    Sobnosky, Ruth Ann
    2017-08-01 | PDF
    To train ODOT staff to recognize trees along the right-of-way that may be hazardous, identify trees that may be of a species-specific concern for vegetation management objectives, make pruning cuts based on industry standards, and oversee the tree work of others, including contractors. Empowering ODOT staff with arboriculture knowledge will make st ...
  • Innovative Techniques for Maintenance Repair and Reconstruction MRR of Asphalt Roadways
    Innovative Techniques for Maintenance Repair and Reconstruction (MRR) of Asphalt Roadways
    Salman, Baris ;
    Salem, Ossama (Sam)
    2017-08-01 | PDF
    Highway networks in the United States have been suffering from poor operational and structural condition states for the past decades. The consequent congestion problems often result in major delays, safety issues, and large amounts of additional fuel consumption and greenhouse gas emissions. With limited funding available, transportation agencies a ...
  • Environmental Suitability of Weathering Steel Structures in Florida Material Selection Phase 2
    Environmental Suitability of Weathering Steel Structures in Florida - Material Selection, Phase 2.
    Granata, Richard ;
    Presuel-Moreno, Francisco
    2017-08-01 | PDF
    For the purpose of establishing guidelines for selection of weathering steel material for bridges in Florida, data were collected to help establish appropriate guidelines. There were 30 monitoring stations set up for direct (weight loss) measurements and weather data. Data indicated that the corrosion rates in Florida are generally low for weatheri ...
  • SelfConsolidating Concrete for Prestressed Bridge Girders Research Brief
    Self-Consolidating Concrete for Prestressed Bridge Girders : Research Brief
    Seo, Junwon ;
    Doocy, Steve
    2017-08-01 | PDF
    Self-consolidating concrete (SCC) is commonly used as an alternative to conventional concrete (CC) in precast, prestressed concrete (PSC) bridge girders. The high strength, highly workable mixture can flow through dense reinforcement to fill formwork and achieve minimal segregation without the assistance of vibration mechanisms, saving time and mon ...
  • The Local Effects of the American Recovery and Reinvestment Act on Economic Activity and Traffic Safety
    The Local Effects of the American Recovery and Reinvestment Act on Economic Activity and Traffic Safety
    Shoag, Daniel
    2017-08-01 | PDF
    The American Recovery and Reinvestment Act of 2009 provided significant funds for transportation projects in Massachusetts, with restrictions aimed at ensuring the funds were spent quickly. These restrictions led to the funding of transportation projects across the state whose timing was unrelated to discrete changes in local trends. In this projec ...
  • CONTECH A2000 Polyvinyl Chloride PVC Plastic Pipe Final Report
    CONTECH® A-2000 Polyvinyl Chloride (PVC) Plastic Pipe [Final Report]
    Abernathy, Craig
    2017-08-01 | PDF
    Determine the effectiveness and long-term durability of the Contech A-2000 PVC pipe in an irrigation application. This type of pipe may prove to be a viable alternative to reinforced concrete pipe (RCP). Project name: Checkerboard - Martinsdale (CN 4803000). Location: U. S. Highway 12/P-14 (C000014), Meagher County, Butte District.
  • Aging in Place in Small Urban and Rural Communities
    Aging in Place in Small Urban and Rural Communities
    Peterson, Del ;
    Rieck, Ted J.
    2017-08-01 | PDF
    The American population continues to mature with an impending “aging tsunami” just a few years away. It is projected that by 2050, the number of Americans 65 years old or older will increase to more than 83 million, nearly double its current population of 43 million (U.S. Census 2014). Public transportation provides freedom to much of the aging pop ...
  • Continued Field Evaluation of Precutting for Maintaining Asphalt Concrete Pavements with Thermal Cracking
    Continued Field Evaluation of Precutting for Maintaining Asphalt Concrete Pavements with Thermal Cracking
    Liu, Jenny ;
    Zhao, Sheng
    2017-08-01 | PDF
    In continuation of a previously completed project entitled Evaluate Presawn Transverse Thermal Cracks for Asphalt Concrete Pavement, this project was a further effort to understand important variables in the thermal cracking process through continued field monitoring of three precutting test sites in Interior Alaska. The test sites included (1) Phi ...
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