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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 3081 - 3100 of 35959 results
  • Road Ranger Programs for Arterials
    Road Ranger Programs for Arterials
    Srinivasan, Sivaramakrishnan ;
    Bejleri, Ilir
    2021-11-01 | PDF
    The intent of this project was to examine the spatiotemporal profile of incidents and suggest an initial plan for service patrol deployment for the arterials in Orlando. The study area was defined by the following boundaries: SR-434 in the north, US-17-92, I-4, US-441 in the east, SR-482 (Sand Lake Rd) in the south; and Kirkman Rd, John Young Pkwy ...
  • Marketing Research for the Quantifiable Benefits of Transit in New Jersey Volume II Final Report Technical Appendices
    Marketing Research for the Quantifiable Benefits of Transit in New Jersey — Volume II: Final Report Technical Appendices
    Carnegie, Jon A. ;
    Deka, Deva
    2021-11-01 | PDF
    New Jersey boasts an extensive system of public transportation that operates statewide, serving approximately two-thirds of the State’s municipalities. The many benefits of public transportation have been widely discussed and analyzed in both academic literature and popular media. This research assembled data and information and estimated numerous ...
  • Synthesis Study Quantifying the Effect of UHPC Fiber Dispersion and Orientation in Structural Members
    Synthesis Study Quantifying the Effect of UHPC Fiber Dispersion and Orientation in Structural Members
    Zhang, Qian ;
    Islam, Md. Mashfiqul
    2021-11-01 | PDF
    Ultra high performance concrete (UHPC) has been researched and implemented in the State of Florida for its superior structural and durability performance. Despite several successful structural level demonstrations, fiber dispersion and orientation remain a concern in the UHPC and general fiber-reinforced concrete communities. Quantifying the actual ...
  • Accelerating Pavement Construction Using Innovative Tools and Techniques
    Accelerating Pavement Construction Using Innovative Tools and Techniques
    Goehl, Darlene C ;
    Scullion, Thomas
    2021-11-01 | PDF
    The researchers investigated innovative tools and techniques to accelerate pavement construction. In coordination with Texas Department of Transportation (TxDOT) districts, the researchers identified four roadway projects to perform case studies using innovative tools and techniques to accelerate pavement construction. The researchers tested these ...
  • Mapping ECommerce Locally and Beyond CITT K12 Special Investigation Project
    Mapping E-Commerce Locally and Beyond: CITT K12 Special Investigation Project
    O'Brien, Thomas ;
    Matsumoto, Deanna
    2021-11-01 | PDF
    As all aspects of the American workplace become automated or digitally enhanced to some degree, K12 educators have an increasing responsibility to help their students acquire the technical skills necessary to organize and interpret information. Increasingly, this is done through Geographic Information Systems (GIS), especially in careers related to ...
  • Marketing Research for the Quantifiable Benefits of Transit in New Jersey Volume I Final Report
    Marketing Research for the Quantifiable Benefits of Transit in New Jersey — Volume I: Final Report
    Carnegie, Jon A. ;
    Deka, Deva
    2021-11-01 | PDF
    New Jersey boasts an extensive system of public transportation that operates statewide, serving approximately two-thirds of the State’s municipalities. The many benefits of public transportation have been widely discussed and analyzed in both academic literature and popular media. This research assembled data and information and estimated numerous ...
  • Effectiveness of GeotextilesGeogrids in Roadway Construction Determine a Granular Equivalent GE Factor
    Effectiveness of Geotextiles/Geogrids in Roadway Construction; Determine a Granular Equivalent (GE) Factor
    Alimohammdi, Hossein ;
    Schaefer, Vernon R.
    2021-11-01 | PDF
    Geogrids have been widely used in roadway construction as reinforcement in pavement foundations. Geogrids have been effective in practice for reducing rutting damage, distributing traffic loads within the pavement foundation layers, increasing the resilient modulus of the base course, and stabilizing the subgrade layer. For this project, an integra ...
    Supporting Files
  • How Do Californias Local Governments Fund Surface Transportation A Guide to Revenue Sources
    How Do California’s Local Governments Fund Surface Transportation? A Guide to Revenue Sources
    Agrawal, Asha Weinstein ;
    Lee, Kevin Yong
    2021-11-01 | PDF
    California local agencies raise the revenue to support high-quality transportation services and infrastructure from a patchwork of federal, state, and local sources. To assist policymakers and transportation experts as they explore options for creating a more sustainable funding system, this report presents an overview of the taxes and fees that cu ...
  • Analytical Models for Traffic Congestion and Accident Analysis
    Analytical Models for Traffic Congestion and Accident Analysis
    Liu, Hongrui ;
    Shetty, Rahul Ramachandra
    2021-11-01 | PDF
    In the US, over 38,000 people die in road crashes each year, and 2.35 million are injured or disabled, according to the statistics report from the Association for Safe International Road Travel (ASIRT) in 2020. In addition, traffic congestion keeping Americans stuck on the road wastes millions of hours and billions of dollars each year. Using stati ...
  • Safeguarding Equity in OffSite Vehicle Miles Traveled VMT Mitigation in California
    Safeguarding Equity in Off-Site Vehicle Miles Traveled (VMT) Mitigation in California
    Alexander, Serena E ;
    Alfonzo, Mariela
    2021-11-01 | PDF
    Historically, the State of California assessed the environmental impacts of proposed developments based on how it was projected to affect an area’s level of service (LOS). However, as LOS focused on traffic delays, many agencies simply widened roads, which was an ineffective way to reduce greenhouse gas emissions (GHGs). With the passage of Senate ...
  • A Review of Kentuckys ExtendedWeight Hauling Programs
    A Review of Kentucky’s Extended-Weight Hauling Programs
    Marks, P Gayle ;
    Wilcoxson, Jon
    2021-11-01 | PDF
    Kentucky established its Extended Weight Coal or Coal By-products Haul Road System (EWCHRS) to increase the state’s competitiveness within the coal industry and reduce financial burdens on coal haulers. A new extended-weight haul system for unrefined petroleum products will come online in 2022. To facilitate enforcement of weight limits throughout ...
  • Analysis of Advanced Driver Assistance Systems in Police Vehicles A Survey Study
    Analysis of Advanced Driver Assistance Systems in Police Vehicles: A Survey Study
    Wozniak, David ;
    Shahini, Farzaneh
    2021-11-01 | PDF
    Few studies have examined the impact of advanced driver-assistance systems (ADAS) on police officers to improve driver safety and prevent crashes. This is in spite of police officers having higher driving-related mortality rates than average civilians. To fill this gap, a survey study was conducted on 73 police officers to assess their opinions on ...
  • Capitalizing on Construction Records to Identify Relationships between Construction and Longterm Project Performance Final Report
    Capitalizing on Construction Records to Identify Relationships between Construction and Long-term Project Performance: Final Report
    Rahman, Syeda ;
    Sun, Jingran
    2021-11-01 | PDF
    TxDOT keeps records of contracted roadway projects in several databases: materials and test records, collected for the quality control / quality assurance program, in the SiteManager (SMGR) database; construction-related information in the Design and Construction Information System (DCIS); and performance measures in the Pavement Analyst (PA) datab ...
  • Bus Operations of Three San Francisco Bay Area Transit Agencies during the First Year of the COVID19 Pandemic
    Bus Operations of Three San Francisco Bay Area Transit Agencies during the First Year of the COVID-19 Pandemic
    Kurzhanskiy, Alex A. ;
    Lapardhaja, Servet
    2021-11-01 | PDF
    From March 2020 through March 2021, researchers monitored three San Francisco Bay Area transit agencies: two large – Alameda-Contra Costa Transit District (AC Transit), Valley Transportation Authority (VTA); and one small – Tri Delta Transit. As the lockdown was imposed in response to the COVID-19 pandemic, white-collar commuters, students, and the ...
  • Selection Criteria for Coarse Aggregate in Flexible Pavement Surfaces
    Selection Criteria for Coarse Aggregate in Flexible Pavement Surfaces
    Goehl, Darlene C ;
    Gurganus, Charles
    2021-11-01 | PDF
    The safety of the traveling public is a priority for the Texas Department of Transportation (TxDOT) and the Federal Highway Administration (FHWA). From the 1960s to current practice, FWHA’s guidance has evolved along with TxDOT’s policies and procedures to reduce wet-weather accidents. TxDOT’s Form 2088 is part of the wet-surface crash reduction pr ...
  • Safe Intersection Crossing for Pedestrians With Disabilities
    Safe Intersection Crossing for Pedestrians With Disabilities
    Smith, Stephen F. ;
    Rubinstein, Zachary B.
    2021-11-01 | PDF
    The focus of this project has been on addressing some remaining obstacles to the general deployment of PedPal, a smartphone app that assists pedestrians with disabilities in safely crossing signalized intersections. Specifically, work has centered mainly on the design and development of two new capabilities: (1) an approach to localization that is ...
  • Use of LRFR Methodology for Load Rating of INDOT Steel Bridges
    Use of LRFR Methodology for Load Rating of INDOT Steel Bridges
    Khanna, Prekshi ;
    Bowman, Mark D.
    2021-11-01 | PDF
    Load rating of bridges before 1994 was primarily conducted by Load Factor Rating (LFR). In 1994, the American Association of State Highway and Transportation Officials (AASHTO) developed and encouraged the use of a probabilistic-based method titled Load and Resistance Factor Design (LRFD) for carrying out bridge design. A new methodology consistent ...
  • Finite Element Analysis of the Lateral Load Test on Battered Pile Group at I10 Twin Span Bridge
    Finite Element Analysis of the Lateral Load Test on Battered Pile Group at I-10 Twin Span Bridge
    Abu-Farsakh, Murad Y. ;
    Souri, Ahmad
    2021-11-01 | PDF
    The design of pile foundations to resist lateral loads is essential in offshore structures and bridge foundations. The lateral behavior of piles has been studied in the past by experimental investigations coupled with analytical and numerical methods. The problem is complex due to the nonlinearities from soil behavior, gap formation, and pile-soil- ...
  • Assessment of Deteriorated Structural Concrete To Provide Durable Repairs
    Assessment of Deteriorated Structural Concrete To Provide Durable Repairs
    Hopwood, Theodore ;
    Goff, Christopher
    2021-11-01 | PDF
    Most of the structural elements on Kentucky bridges are made of reinforced concrete. Many of these elements deteriorate as a result of corrosion of the reinforcing steel caused by carbonation and — primarily — applications of chlorides by the Kentucky Transportation Cabinet (KYTC). Corrosion of reinforcing steel is reviewed along with assessment pr ...
  • Ridesourcing in Rural Communities North Dakota Driver Survey
    Ridesourcing in Rural Communities, North Dakota Driver Survey
    Vachal, Kimberly
    2021-11-01 | PDF
    The rise of ridesourcing services such as Uber and Lyft in recent years has revolutionized urban transportation across the globe. With the increased popularity of these services came negative impacts on industries such as taxi cab and public transit services. In an era when ridesourcing companies are expanding rapidly in previously untouched market ...
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