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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 2261 - 2280 of 35888 results
  • North Dakota Grain and Oilseed Transportation Statistics 202122
    North Dakota Grain and Oilseed Transportation Statistics 2021–22
    Vachal, Kimberly ;
    Andersen, Jaclyn
    2022-12-01 | PDF
    This report represents a continuation of analysis concerned with the patterns and methods of distributing grains and oilseeds from North Dakota. This series began with the analysis of 1956-57 data and was published in Agricultural Economics Reports 15, 17, 44, 56, and 86 and Agricultural Experiment Station Bulletin 462. The compilation and analysis ...
  • Best Practices for Lighting and Marking Construction and Maintenance Vehicles and Equipment for Safety
    Best Practices for Lighting and Marking Construction and Maintenance Vehicles and Equipment for Safety
    Sulbaran, Tulio ;
    Qasrawi, Amani
    2022-12-01 | PDF
    The purpose of this document is to provide recommendations and guidelines that will help MDOT implement improved lighting and marking standards for both its own fleet of vehicles and equipment as well as the equipment and vehicles used by contractors on DOT projects in order to make roadways safer. The recommendation was based on (1) a qualitative ...
  • Nondestructive Inspection Methods for Liquid Deicer Storage Tanks
    Nondestructive Inspection Methods for Liquid Deicer Storage Tanks
    Behravan, Amir ;
    Tran, Thien Q
    2022-12-01 | PDF
    High-density polyethylene (HDPE) is widely used for above-ground storage tanks (ASTs). However, there are currently no guidelines for non-destructive testing (NDT) and evaluation (NDE) of HDPE ASTs. Moreover, the feasibility, limitation, and challenges of using non-destructive testing techniques for field inspection of HDPE ASTs have not been studi ...
  • Investigation of Number 10 Screenings for Subgrade Soil Improvement
    Investigation of Number 10 Screenings for Subgrade Soil Improvement
    Hossain, M. Shabbir,
    2022-12-01 | PDF
    Poor subgrade often requires in-place stabilization or removal by excavation and replacement with suitable material. Chemical stabilization with cement or lime is a common remediation practice. This study investigated the use of No. 10 screenings, a quarry byproduct finer than the 4.75-mm (No. 4) sieve, as a means to improve poor subgrade condition ...
  • Evaluation of Indoor Automated Stockpile Measurement Systems
    Evaluation of Indoor Automated Stockpile Measurement Systems
    Hirt, Brian
    2022-12-01 | PDF
    The goal of this project was to conduct a data-driven evaluation of currently available automated or semiautomated indoor salt stockpile measuring systems in order to improve agencies’ day-to-day management of their salt stockpile inventories. Based on the types of automated and semi-automated indoor stockpile measuring systems available, project n ...
    Supporting Files
  • GISBased Environmental LongTerm Monitoring Web Portal Phase III
    GIS-Based Environmental Long-Term Monitoring Web Portal Phase III
    Terry, Leigh
    2022-12-01 | PDF
    A GIS-based online portal was developed to store, analyze, and display data from multiple sources pertinent to the ALDOT Coliseum Boulevard groundwater contaminant plume site in Montgomery Alabama. These sources comprise various consultants involved with the site including geotechnical companies, water testing labs, law firms, and management person ...
  • TwoAxle Commercial Vehicle Composition and Occupancy in Western North Dakota
    Two-Axle Commercial Vehicle Composition and Occupancy in Western North Dakota
    Sharma, Kshitij
    2022-12-01 | PDF
    The Office of Highway Policy Information of Federal Highway Administration (FHWA) publishes statistical data about motor vehicle registrations reported by the 50 states and District of Columbia. According to its 2020 publication, the 97.94% of vehicles in the State of North Dakota are registered as either private or commercial. The remaining 2.06% ...
  • Field Load Testing of Shallow Foundations in Florida Limestone Phase
    Field Load Testing of Shallow Foundations in Florida Limestone: Phase Ⅱ
    Rodgers, Michael B ;
    McVay, Michael C.
    2022-12-01 | PDF
    Three full-scale shallow foundation load tests (900 tons) were performed at Miami, Fort Lauderdale, and Bell, Florida, to validate the Florida Bearing Capacity equations (Phase I – FDOT BDV31-977-51) as well develop and verify load-settlement response for service limit state. Rock coring, Standard penetration test (SPT), and seismic shear tests wer ...
  • Automated Tools for Measuring Indoor Salt Stockpiles Research Brief
    Automated Tools for Measuring Indoor Salt Stockpiles [Research Brief]
    Morin, James R. ;
    Stevenson, James
    2022-12-01 | PDF
    Traditionally, salt stockpiles are measured and monitored using manual tools like wheeled tape measures or labor-intensive technologies like handheld or tripod-mounted laser scanners. Advancements in automated technologies could save departments of transportation (DOTs) significant time and money by using fixed-location hardware to scan or photogra ...
  • Development of Tub Girders for Prestressed Concrete Bridges Complying With LRFD
    Development of Tub Girders for Prestressed Concrete Bridges Complying With LRFD
    Kim, Yail Jimmy
    2022-12-01 | PDF
    This report presents the development of tub girders for prestressed concrete bridges complying with the Load and Resistance Factor Design (LRFD) method. In addition, the use of 0.7 in. strands is elaborated for the B618-U girders of the Colorado Department of Transportation. In the first part of the report as regards a state-of-the-art review, tech ...
  • Statewide Intercity Passenger Transportation in Illinois
    Statewide Intercity Passenger Transportation in Illinois
    Sriraj, P. S. ;
    Metaxatos, Paul
    2022-12-01 | PDF
    The COVID-19 pandemic has affected all areas of life in the United States. For travel, the changes have been vast, whether for private vehicle use or public transit use. For the intercity bus industry, the pandemic changed operations in meaningful ways that have yet to return to previous levels – whether on the service or the demand side. This stud ...
  • Expanded Uses of AVLGPS Systems Maximize Value Research Brief
    Expanded Uses of AVL/GPS Systems Maximize Value [Research Brief]
    Gray, David ;
    Spoor, Steve
    2022-12-01 | PDF
    The goal of this project was to demonstrate applications for using AVL/GPS technologies to support winter and all-season maintenance activities. Clear Roads agencies also needed information about the transferability of the technologies to transition the systems between winter and other seasonal maintenance activities. A review of the literature pro ...
  • Quantifying the Impact of Wide Base Tires on Pavement Performance in Michigan
    Quantifying the Impact of Wide Base Tires on Pavement Performance in Michigan
    You, Zhanping ;
    Yin, Lei
    2022-12-01 | PDF
    Since dual tires (DT) have been the trucking industry standard for many decades, existing modeling of the stresses imparted to the pavement through the tires is based on DTs. However, the freight industry has started to use wide base single tires (WBT) due to their economic benefits. This study aimed to investigate the use of WBTs in Michigan (MI) ...
  • CDOT Dynamic Traffic Assignment DTA Implementation Plan
    CDOT Dynamic Traffic Assignment (DTA) Implementation Plan
    Slavin, Howard ;
    Morgan, Daniel
    2022-12-01 | PDF
    This report presents a vision and an implementation plan for region-wide dynamic traffic assignment (DTA) in Colorado. With the proper approach and methods, DTA can be a powerful and cost-effective decision support tool for CDOT’s and MPOs’ transportation planning and engineering responsibilities and activities. In the report, simulation-based DTA ...
  • Develop and Evaluate Performance Measures for Intelligent Transportation Systems ITS in Louisiana
    Develop and Evaluate Performance Measures for Intelligent Transportation Systems (ITS) in Louisiana
    Thapa, Raju ;
    Codjoe, Julius
    2022-12-01 | PDF
    The Louisiana Department of Transportation and Development (DOTD) established Intelligent Transportation System (ITS) programs over 20 years ago. Before DOTD expands or implements new ITS programs, a study needed to be undertaken to evaluate the performance of the current ITS programs to demonstrate their benefits. The primary objective of this res ...
  • Design and Testing of Modular Expansion Joint Noise Mitigation Strategies
    Design and Testing of Modular Expansion Joint Noise Mitigation Strategies
    Reinhall, Per G. ;
    Thomas, Sawyer
    2022-12-01 | PDF
    This study investigated the design and feasibility of noise mitigation strategies for installation in modular expansion joints (MEJs), with a focus on Washington state’s SR 520 bridge. The three main sources of noise from MEJs include resonance of the air within the gaps, resonance of the beams, and resonance of the tires. By filling the gaps in th ...
  • ODOT Radar System for RealTime Traffic Flow Monitoring
    ODOT Radar System for Real-Time Traffic Flow Monitoring
    Refai, Hazem H. ;
    Habib, Mohamed Ali
    2022-12-01 | PDF
    This report presents research results and experiments that were designed to compare four traffic systems: Radar, AVC, HERE, and INRIX in terms of speed, volume, and travel time. The first three chapters introduce the systems, related studies, data collection procedures, and preprocessing techniques. The second three chapters detail the comparison r ...
  • Speed Management on Freeways in Transition Zones between Rural and Urban Conditions
    Speed Management on Freeways in Transition Zones between Rural and Urban Conditions
    Pineda-Mendez, Raul A ;
    Shi, Xueqian
    2022-12-01 | PDF
    Drivers’ noncompliance with the posted speed limit reductions on rural-to-urban freeway transition zones is a recurrent problem in Indiana and other states. Speed-reduction treatments, such as pavement markings and active signing, aim to solve this issue. Optical speed bars, longitudinal speed reduction markings, and speed feedback signs were ident ...
  • Development of Guidance for a Vehicle Occupancy Rate Data Collection Program
    Development of Guidance for a Vehicle Occupancy Rate Data Collection Program
    Xu, Yiqing ;
    Dougald, Lance E
    2022-12-01 | PDF
    Transportation planning practices increasingly require knowing the number of occupants per vehicle. Except for manual observations, Virginia has two data sources for obtaining occupancy: the American Community Survey and the National Household Travel Survey, neither of which provides corridor-specific values. This study developed an approach for es ...
  • PerformanceBased Asphalt Mixture Design PBD for Arkansas
    Performance-Based Asphalt Mixture Design (PBD) for Arkansas
    Hall, Kevin D. ;
    Castillo-Camarena, Elvis
    2022-12-01 | PDF
    This project sought to develop/adapt and implement a 'cracking test' for asphalt mixture design, to use in conjunction with the current Asphalt Pavement Analyzer rutting test to shift mixture design in Arkansas to a performance, rather than volumetric, basis. In addition, the project attempted to re-evaluate the effectiveness of the current method ...
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