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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 3761 - 3780 of 36908 results
  • Illinois Highway Materials Sustainability Efforts 2020
    Illinois Highway Materials Sustainability Efforts 2020
    Morse, Kelly L.
    2021-08-23 | PDF
    The Illinois Department of Transportation (IDOT) continues to use a variety of reclaimed and recycled materials in highway construction. Recycled materials are used in highway construction to supplement aggregates, concrete, hot-mix asphalt (HMA), steel, and sealants, as well as for soil modification and pavement markings. This report summarizes th ...
  • Evaluating SystemLevel Impacts of Innovative Truck Routing Strategies
    Evaluating System-Level Impacts of Innovative Truck Routing Strategies
    Boriboonsomsin, Kanok ;
    Hao, Peng
    2021-08-15 | PDF
    Heavy-duty diesel trucks (HDDTs) are significant contributors of fine particulate matter (PM2.5) and nitrogen oxides (NOx) emissions. As a result, communities with a large amount of truck traffic often experience elevated levels of diesel-related air pollution. One strategy for mitigating the air pollution impacts of truck traffic, called low expos ...
  • Effectiveness of Crash FactSafety Message Signs on Dynamic Message Signs
    Effectiveness of Crash Fact/Safety Message Signs on Dynamic Message Signs
    Savolainen, Peter T. ;
    Gates, Timothy J.
    2021-08-11 | PDF
    From 2010 to 2020, transportation agencies have increasingly used roadside dynamic message signs (DMS) to display safety messages. Despite their widespread use, evaluations as to potential impacts on driver behavior, and the resultant impacts on traffic crashes has been very limited. This study evaluated the use of DMS to display safety messages le ...
  • Slope Restoration on Urban Freeways
    Slope Restoration on Urban Freeways
    Cregg, Bert ;
    Schutzki, Robert
    2021-08-11 | PDF
    Diverse plantings along freeway roadsides can be beneficial to surrounding areas in many ways, such as improved driver safety, increased biodiversity, and improved aesthetics. Unfortunately, establishing these plantings can be difficult for a variety of reasons. To improve the success of future plantings, the authors investigated the impacts of sit ...
  • Connected Vehicle Pilot Deployment Program Phase 1 Concept of Operations ConOps New York City
    Connected Vehicle Pilot Deployment Program Phase 1, Concept of Operations (ConOps) - New York City
    Galgano, Steve ;
    Talas, Mohamad
    2021-08-04 | PDF
    This document describes the Concept of Operations (ConOps) for the New York City Department of Transportation (NYC) Connected Vehicle Pilot Deployment (CVPD) Project. This ConOps describes the current state of operations, establishes the reasons for change, and defines the future system in terms of functions/features and supporting operations. It i ...
  • Phase 1 Concept of Operations ConOps Heart of Iowa Regional Transit Agency ITS4US Deployment Project
    Phase 1 Concept of Operations (ConOps): Heart of Iowa Regional Transit Agency ITS4US Deployment Project
    Mishra, Santosh ;
    Wilks, Steve
    2021-08-04 | ITS4US Phase 1 | PDF
    The Concept of Operations (ConOps) document will serve as the guiding document for the Health Connector Phase 1 planning activities, and subsequent deployment and operations and maintenance (O&M) activities in Phases 2 and 3. This document will be used to communicate overall quantitative and qualitative system characteristics to the end user, devel ...
  • Connected Vehicle Pilot Deployment Program Phase 1 System Requirements Specification SyRS New York City
    Connected Vehicle Pilot Deployment Program Phase 1, System Requirements Specification (SyRS) – New York City.
    Galgano, Steve ;
    Talas, Mohamad
    2021-08-04 | PDF
    This document describes the System Requirements Specification (SyRS) for the New York City Department of Transportation (NYC) Connected Vehicle Pilot Deployment (CVPD) Project. This SyRS describes the results of the definition of need, the operational concept, and system analysis tasks. It also conveys the requirements that are geared towards satis ...
  • Evaluation of Advanced Communication Technologies Through Traffic Microsimulation
    Evaluation of Advanced & Communication Technologies Through Traffic Microsimulation
    Manjunatha, Pruthvi ;
    Elefteriadou, Lily
    2021-08-02 | PDF
    Evaluation of VISSIM revealed that internal modeling of CAV has several limitations. For external modeling, two VISSIM interfaces are useful. The Component Object Model (COM)Application Programming Interface (API) is the superior approach for fetching data and modeling connectivity, whereas the External Driver Model (EDM) is a better tool for later ...
  • Impact of Smartphone Applications on Trip Routing
    Impact of Smartphone Applications on Trip Routing
    Guin, Angshuman ;
    Hadi, Mohammed
    2021-08-02 | PDF
    The Georgia Institute of Technology-led research evaluated trip re-routing potential of route guidance apps, how drivers utilized the information provided, and the impact of traffic re-routing on roadway facility usage, congestion, and prevailing speeds. Major findings of this study included a variety of characteristics associated with navigation a ...
  • US 160 Dry Creek Wildlife Study
    US 160 Dry Creek Wildlife Study
    Cramer, Patricia ;
    Hamlin, Robert
    2021-08-01 | PDF
    The study monitored the effectiveness of the CDOT US 160 Dry Creek Wildlife Mitigation Project, located between Durango and Bayfield in Southwest of Colorado. Mitigation included a wildlife crossing structure at mile post (MP) 97.42, wildlife exclusion fence on both sides of US 160 from MP 97.05 to MP 97.82, and two EnviroGrid® Geocell treatments p ...
  • Analysis of the Georgia AddOn to the 20162017 National Household Travel Survey
    Analysis of the Georgia Add-On to the 2016–2017 National Household Travel Survey
    Kash, Gwen ;
    Mokhtarian, Patricia L.
    2021-08-01 | PDF
    Through an extensive analysis of the Georgia subsample of the 2016–2017 National Household Travel Survey, this report provides an in-depth snapshot of the travel behavior of Georgians of all ages. It documents differences in travel needs and behavior by region and between demographic groups, focuses on measurement challenges and improved techniques ...
  • Development of a Laboratory Testing Protocol To Evaluate Alternative Materials for Use in Modifying Asphalt Binders and Alternative Materials for Use in Modifying Asphalt Mixtures
    Development of a Laboratory Testing Protocol To Evaluate Alternative Materials for Use in Modifying Asphalt Binders and Alternative Materials for Use in Modifying Asphalt Mixtures
    Karki, Pravat ;
    Zhou, Fujie
    2021-08-01 | PDF
    The objectives of this project were to develop separate approval protocols for alternative asphalt binder additives and alternative asphalt mixture additives. To develop these protocols, PG 76-22 (PMA) binder and its Superpave 12.5-mm mix with granite (i.e., control binder and mixture) and two alternatively modified asphalt PG 76-22 binders and the ...
  • Alternate Reinforcements for Enhanced Corrosion Resistance in TxDOT Bridges
    Alternate Reinforcements for Enhanced Corrosion Resistance in TxDOT Bridges
    Lute, Racheal D ;
    Folliard, Kevin J.
    2021-08-01 | PDF
    The corrosion of reinforcing steel in concrete is the leading cause of deterioration for reinforced concrete structures, especially bridges exposed to external chlorides. Practitioners and researchers have evaluated and implemented various technologies to combat this problem, including the use of high-performance concrete, chemical corrosion inhibi ...
  • Multimodal Connected Vehicle Pilot for Winter Travel
    Multimodal Connected Vehicle Pilot for Winter Travel
    Dey, Kakan ;
    Shi, Xianming
    2021-08-01 | PDF
    No Description
  • Optimizing Design of GDOT Post Construction Stormwater BMPs for Performance While Minimizing RightofWay Acquisition and Peak Flows
    Optimizing Design of GDOT Post Construction Stormwater BMPs for Performance While Minimizing Right-of-Way Acquisition and Peak Flows
    Burns, Susan E
    ORCID ICON IMG
    2021-08-01 | PDF
    The objectives of this study were to evaluate the performance of stormwater best management practices (BMPs) used for stormwater quantity and quality control. Three field sites were tested to quantify hydraulic conductivity, infiltration, and solids removal efficiency. Removal efficiencies ranged from 12% to 35% of infiltrated runoff for VFS rangin ...
  • Determining Bond Strength of Microsurfacing Mixes Phase 2
    Determining Bond Strength of Micro-surfacing Mixes - Phase 2
    Nazzal, Munir D. ;
    Kim, Sang Soo
    2021-08-01 | PDF
    This report summarizes results of a project that was completed to determine the benefits and drawbacks of using tack coat in micro-surfacing applications and identify the tack coat application rate that will result in the optimum interface bond strength and better performance for micro-surfacing applications using different tack coat materials. The ...
  • Environmental Impacts of Short Car Trip Replacement with Micromobility Modes
    Environmental Impacts of Short Car Trip Replacement with Micromobility Modes
    Harper, Corey ;
    Fan, Zhufeng
    2021-08-01 | PDF
    Micromobility (defined as shared bikes, e-bikes and e-scooters) represent a significant opportunity to replace short distance trips made by personally owned vehicles (POVs) and provide first-and last-mile solutions for underserved public transit riders. This research develops a methodology for estimating the upper bound number of short-distance POV ...
  • AirportMPO Collaboration Challenges and Opportunities for Cooperative Megaregional Transportation Planning
    Airport-MPO Collaboration: Challenges and Opportunities for Cooperative Megaregional Transportation Planning
    Rahman, Mashrur ;
    Sciara, Gian Claudia
    2021-08-01 | PDF
    This study explores the challenges and opportunities that aviation market changes present for existing transportation governance structures and institutions. In particular, we examine the capacity of existing planning institutions–largely siloed in separate air and surface transport planning domains—to address the megaregional dynamics associated w ...
  • Development of Gyratory Stability Index to Evaluate Variation of RAP Content and Rutting Resistance of Asphalt Mixtures
    Development of Gyratory Stability Index to Evaluate Variation of RAP Content and Rutting Resistance of Asphalt Mixtures
    Kassem, Emad ;
    Bayomy, Fouad M. S.
    2021-08-01 | PDF
    ITD Research Report RP 175 developed an algorithm for determining a Gyratory Stability (GS) for asphalt mixtures based on the Servopac gyratory compactor. The GS describes the ability of asphalt mixtures to resist rutting, and it can be determined during the mix design stage using the gyratory compaction data. This study developed a modified algori ...
  • Constructing High Performance Asphalt Pavements by Improving in Place Pavement Density
    Constructing High Performance Asphalt Pavements by Improving in Place Pavement Density
    Kumar, Vikas ;
    Coleri, Erdem
    2021-08-01 | PDF
    Increasing the density of asphalt concrete materials is expected to result in significant economic and environmental benefits by increasing asphalt mix strength and reducing cracking and rutting. In addition, reduced air-void content is expected to reduce permeability and moisture-induced pavement damage. Reduced permeability is also expected to re ...
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