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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 2361 - 2380 of 36151 results
  • PerformanceEngineered Concrete Paving Mixtures
    Performance-Engineered Concrete Paving Mixtures
    Gross, Jerod ;
    Weiss, Jason
    2022-12-01 | PDF
    This Performance-Engineered Concrete Paving Mixtures Transportation Pooled Fund—TPF-5(368)—brought newer concrete pavement technologies to state agencies and assisted states in the adoption of specifications and test methods that will help them deliver on the promise of concrete durability. The Federal Highway Administration (FHWA), 19 state transp ...
  • Comprehensive Analysis on the Conversion of the Existing HOV Lanes into Hot Lanes in Tennessee
    Comprehensive Analysis on the Conversion of the Existing HOV Lanes into Hot Lanes in Tennessee
    Chimba, Deo ;
    Camp, Janey
    2022-12-01 | PDF
    This study analyzed the conversion of HOV Lanes to HOT Lanes in Tennessee. The research applied several approaches including microsimulations of HOV/HOT Lanes that employed data from Greater Nashville Regional Council (GNRC) travel demand model and field collected traffic counts. Microsimulation was conducted through VISUM and VISSIM software by im ...
  • Statewide Implementation of the Surface Performance Graded SPG Specification for Chip Seal Binders in Service Implementation Report
    Statewide Implementation of the Surface Performance Graded (SPG) Specification for Chip Seal Binders in Service: Implementation Report
    Martin, Amy Epps ;
    Arámbula-Mercado, Edith
    2022-12-01 | PDF
    Over the past almost 20 years, a Surface Performance-Graded (SPG) specification for chip seal binders was developed and validated using laboratory measurements and visual field performance of 141 highway sections. This SPG specification was established in an effort to extend the service life of chip seals and save approximately $9 million per year ...
  • Optimizing Laboratory Curing Conditions for Hot Mix Asphalt to Better Simulate Field Behavior
    Optimizing Laboratory Curing Conditions for Hot Mix Asphalt to Better Simulate Field Behavior
    Arras, Benjamin ;
    Sreeram, Anand
    2022-12-01 | PDF
    The engineering properties of asphalt mixtures change with time. Shortly after placement, asphalt concrete (AC) layers are more susceptible to rutting. As the pavement ages, the AC layer becomes stiffer, brittle, and thus more susceptible to cracking. Current protocols provide guidelines for the selection of materials, the determination of the mate ...
  • Deep Learning Models and Tools for Disaster Evacuation and Routing
    Deep Learning Models and Tools for Disaster Evacuation and Routing
    Corns, Steven M ;
    Long, Suzanna K
    2022-12-01 | PDF
    Engineering managers and transportations planners need robust tools to communicate evacuation routing plans following disruptions from earthquake events. The project will use the New Madrid Seismic Zone in South-East Missouri as a testbed for modeling the response to an earthquake and aftershocks at Magnitude 8+. This area was chosen as it allows s ...
  • Potential Applications to Expand the Texas Connected Freight Corridors System
    Potential Applications to Expand the Texas Connected Freight Corridors System
    Wood, Nick ;
    Anderson, Paul R.
    2022-12-01 | PDF
    The Texas Connected Freight Corridors (TCFC) system is a connected vehicle (CV) environment that seeks to improve safety and mobility for the Texas Triangle, which consists of the Austin, Dallas/Fort Worth, Houston, San Antonio, and Laredo metropolitan regions. The TCFC project is a baseline effort to develop and deliver six initial applications fo ...
  • Assessment of Electric Utility Capacity to Deliver Electricity for Electric Aviation at Paine Field and Grant County International Airport
    Assessment of Electric Utility Capacity to Deliver Electricity for Electric Aviation at Paine Field and Grant County International Airport
    Coenen, Steffen ;
    Malarkey, Daniel
    2022-12-01 | PDF
    Advances in battery-powered electric motor systems, lightweight materials, and aircraft design have resulted in the development of new electric aircraft that could gradually replace conventional fuel-powered aircraft for certain use cases in the coming years. In addition, a whole new category of electric vertical takeoff and landing aircraft has se ...
  • Traffic Safety Facts Overview of the 2021 Crash Investigation Sampling System
    Traffic Safety Facts: Overview of the 2021 Crash Investigation Sampling System
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2022-12-01 | PDF
    This research note examines data from the newly modernized Crash Investigation Sampling System (CISS) for 2021. The data shows that there were an estimated 2,698,338 police-reported motor vehicle crashes nationwide where at least one passenger vehicle (i.e., passenger car, light truck or van 10,000 lbs. or less) was towed from the crash scene, whic ...
  • Seismic Monitoring for Asset Management and Prioritization of Transportation Infrastructure
    Seismic Monitoring for Asset Management and Prioritization of Transportation Infrastructure
    Camp, Janey ;
    Croope, Silvana V.
    2022-12-01 | PDF
    During and immediately after a seismic event, information on the condition of the transportation network and individual assets can be limited without deploying personnel for inspection. Damages to bridge and/or overpass approaches could render bridges useless for evacuation and/or response activities. Therefore, employing low-cost sensing to monito ...
  • MultiSpan Lateral Slide Laboratory Investigation Phase II Tech Transfer Summary
    Multi-Span Lateral Slide Laboratory Investigation: Phase II [Tech Transfer Summary]
    Dahlberg, Justin ;
    Phares, Brent
    2022-12-01 | PDF
    The objective of this project was to investigate the performance of the ultrahigh performance concrete (UHPC) closure joint reinforced with noncontact lap-spliced reinforcing steel bar, with a specific focus on determining when a noncontact lap splice has sufficient strength to either open a bridge or expose it to construction loading. In addition, ...
  • Impact of IncentiveDisincentive Specifications on LongTerm Asphalt Pavement Performance
    Impact of Incentive/Disincentive Specifications on Long-Term Asphalt Pavement Performance
    Lee, Hyung S ;
    Nabizadeh, Hadi
    2022-12-01 | PDF
    FDOT’s Percent Within Limits (PWL) specification for acceptance and payment of asphalt materials was first implemented in 2002. The objective of this study was to determine the level of impact that FDOT’s PWL specification has on the long-term performance of asphalt pavements. To meet this objective, Multinomial Logistic Regression Analyses (MLRA) ...
  • Potential Challenges and Research Needs in Reaching 100 Zero Emission Vehicle Sales a Focus on PlugIn Electric Vehicles
    Potential Challenges and Research Needs in Reaching 100% Zero Emission Vehicle Sales- a Focus on Plug-In Electric Vehicles
    Hardman, Scott ;
    Chakraborty, Amrita
    2022-12-01 | PDF
    This project provides a literature review of research on zero emission vehicles (ZEVs) which includes fuel cell vehicles, battery electric vehicles, and plug-on hybrid electric vehicles, the latter are referred to as plug-in electric vehicles (PEV). In the review we focus on PEVs due to a lack of literature on fuel cell vehicles. We consider buyer ...
  • Pavement Repairs in Preparation for a Preventative Maintenance Contract
    Pavement Repairs in Preparation for a Preventative Maintenance Contract
    Goehl, Darlene ;
    Estakhri, Cindy
    2022-12-01 | PDF
    The synthesis study focused on pavement preparatory work performed before preventive maintenance (PM) surfacing contracts with the goal of answering, “What work needs to be performed to the roadway before a new surface is placed?” Preparatory work performed by in-house maintenance forces or maintenance contracts may include crack sealing, fog seal, ...
  • 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% ...
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