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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 6801 - 6820 of 36104 results
  • Visual Impact Assessment Mitigation Strategies Research
    Visual Impact Assessment Mitigation Strategies Research
    Banovich, Michael ;
    Suddjian, Susan
    2018-06-01 | PDF
    The main objective was to assemble a framework for writing effective visual impact mitigation measures for adverse visual resource impacts and preparing design guidelines. This included strategies to implement National Environmental Policy Act (NEPA) visual impact mitigation commitments through transportation project planning, design, construction, ...
  • Evaluation of Major Street Speeds for Minnesota Intersection Collision Warning Systems
    Evaluation of Major Street Speeds for Minnesota Intersection Collision Warning Systems
    Hallmark, Shauna
    2018-06-01 | PDF
    This study is a complement to Evaluation of Intersection Collision Warning Systems in Minnesota (2017-18), which was published in October 2017. That project evaluated behaviors such as type of stop for drivers on the minor approach in the presence of intersection collision warning systems (ICWS). This project was a follow-up to that study and compa ...
  • Evaluation of Revised IncentiveOnly Ride Specification for Asphalt Pavements
    Evaluation of Revised Incentive-Only Ride Specification for Asphalt Pavements
    Nair, Harikrishnan ;
    McGhee, Kevin K
    2018-06-01 | PDF
    In late 2011, the executive leadership of the Virginia Department of Transportation (VDOT) formed an Asphalt Quality Task Force to identify and recommend specific achievable measures to improve the quality of asphalt paving in Virginia. The task force recommended that VDOT assess the feasibility of making an incentive-only provision for ride qualit ...
  • Review of the UDOT Procurement Process for a Maintenance Management System
    Review of the UDOT Procurement Process for a Maintenance Management System
    Zilay, Rob
    2018-06-01 | PDF
    The Utah Department of Transportation (UDOT) contracted with Dye Management Group, Inc. (DMG) to conduct an outside review of the process to procure a maintenance management system (MMS). In March of 2018, UDOT issued a request for proposal (RFP) for a commercial off-the-shelf (COTS) maintenance management system. After receiving and evaluating pro ...
  • Optimizing Available Surveying Technology to Streamline Project Delivery
    Optimizing Available Surveying Technology to Streamline Project Delivery
    Van Dyke, Chris ;
    Kirk, Adam
    2018-06-01 | PDF
    Kentucky Transportation Cabinet (KYTC) Project Managers bear responsibility for preparing all phases of highway projects, from initial concept to letting, while Section Engineers manage all phases of highway construction projects, from letting to completion. To perform the activities for which they are responsible, these stakeholders require knowle ...
  • Comparisons of Mandatory and Discretionary Lane Changing Behavior on Freeways
    Comparisons of Mandatory and Discretionary Lane Changing Behavior on Freeways
    Vechione, Matthew ;
    Balal, Esmaeil
    2018-06-01 | PDF
    This research performs comparative analyses on drivers’ behavior during mandatory and discretionary lane changes. We do this by examining the statistical properties of four lane changing decision variables that describe the gaps between the subject vehicle and the surrounding vehicles. Mandatory and discretionary lane changes in NGSIM’s I-80 Freewa ...
  • Cross Slope Verification Using Mobile Scanning on SCDOT Highways
    Cross Slope Verification Using Mobile Scanning on SCDOT Highways
    Sarasua, Wayne A. ;
    Ogle, Jennifer Harper
    2018-06-01 | PDF
    Ensuring adequate cross slopes on South Carolina highways and interstates is an important safety practice. When cross slopes are too flat, too steep, or vary across the travel lanes, a number of safety issues can occur (i.e., hydroplaning, loss of control, and run-off-road crashes). South Carolina Department of Transportation (SCDOT) is seeking to ...
  • Network Analysis of the Multimodal Freight Transportation System in New York City Brief
    Network Analysis of the Multimodal Freight Transportation System in New York City [Brief]
    Wang, Qian ;
    Tang, Shuai
    2018-06-01 | PDF
    The efficiency and effectiveness of transportation networks plays a vital role in moving people and circulating goods. This research is aimed at examining the multimodal freight transportation network in the New York metropolitan region to identify critical links, nodes and bottlenecks that affect last-mile deliveries. More specifically, the object ...
  • Improving Efficiency and Reliability of Bus Rapid Transit
    Improving Efficiency and Reliability of Bus Rapid Transit
    Liu, Xiaoyue Cathy ;
    Zlatkovic, Milan
    2018-06-01 | PDF
    In recent years, Bus Rapid Transit (BRT) systems have been gaining increasing popularity because of their effectiveness in improving urban mobility. The Utah Transit Authority (UTA) is the primary public transit provider in Salt Lake City and has implement ed a 10.8- mile BRT route along 3500/3300 South in Salt Lake City . A total of 106 miles of B ...
    Supporting Files
  • Calibration of the AASHTOWare Pavement ME Design Performance Models for Flexible Pavements in Idaho
    Calibration of the AASHTOWare Pavement ME Design Performance Models for Flexible Pavements in Idaho
    Bayomy, Fouad ;
    Muftah, Ahmed
    2018-06-01 | PDF
    This project aims at developing local calibration factors for the AASHTOWare Pavement Mechanistic-Empirical Design (PMED) software. The performance models included in the software as released by AASHTO are calibrated from national Long-Term Pavement Performance (LTPP) pavement sites. Hence, the models calibration factors represent averages of natio ...
  • Effectiveness of Wildlife Mitigation Treatments Along the Nelsonville Bypass
    Effectiveness of Wildlife Mitigation Treatments Along the Nelsonville Bypass
    Hopkins, Charlene B ;
    Johnson, Joseph S
    2018-06-01 | PDF
    The Nelsonville Bypass is a 9 mile stretch of U.S. Route 33 that runs through the Wayne National Forest, an area high in species diversity and home to several threatened and endangered species. The motorist safety, economic and conservation values of building effective mitigation features that reduce vehicle-wildlife collisions along the bypass hav ...
  • Development of Mix Design and Structural Design Procedures for Cold InPlace Recycling
    Development of Mix Design and Structural Design Procedures for Cold In-Place Recycling
    Sebaaly, Peter E. ;
    Castro, Jorge A
    2018-06-01 | PDF
    This research effort conducted extensive evaluations of CIR mixtures in support of the development of a mix design method for CIR mixtures and a structural design method for flexible pavements with CIR layers. CIR mixtures with two gradations, two lime slurries, and four asphalt emulsions were designed using the Hveem and Superpave methods and thei ...
  • Bicycle Count Data What is it Good for A Study of Bicycle Travel Activity In Central Lane Metropolitan Planning Organization
    Bicycle Count Data : What is it Good for? A Study of Bicycle Travel Activity In Central Lane Metropolitan Planning Organization
    Roll, Josh
    ORCID ICON IMG
    2018-06-01 | PDF
    This report documents the use of bicycle traffic volume data for the purposes of travel monitoring, crash analysis, and health impact assessment in the Central Lane Metropolitan Planning Organization. The report showcase a new method for estimating annual traffic from short term counts using the Seasonal Adjustment Regression Method (SARM) and demo ...
  • Evaluation of Warm Mix Asphalt Technology in Flexible Pavements 2018
    Evaluation of Warm Mix Asphalt Technology in Flexible Pavements [2018]
    Mohammad, Louay ;
    Raghavendra, Amar
    2018-06-01 | PDF
    Warm mix asphalt (WMA) was first developed in Europe as an effort to reduce the greenhouse gas emission associated with asphalt pavement construction. In general, the WMA technologies can be divided into three categories: foaming techniques (water-based and water-bearing), organic or wax additives, and chemical additives. With the significantly low ...
    Supporting Files
  • Aviation Noise and Cardiovascular Health in the United States a Review of the Evidence and Recommendations for Research Direction
    Aviation Noise and Cardiovascular Health in the United States: a Review of the Evidence and Recommendations for Research Direction
    Peters, J. I. ;
    Zevitas, Christopher D.
    2018-06-01 | PDF
    Purpose of the Review In the USA, there is mounting pressure on aviation operators and regulators to address concerns about community impacts of aircraft noise given increasing evidence of adverse health impacts, continuing community complaints, availability of cost-effective programs to reduce exposures to aircraft noise, and more stringent intern ...
  • A Method to Estimate Annual Average Daily Traffic for Minor Facilities for MAP21 Reporting and Statewide Safety Analysis
    A Method to Estimate Annual Average Daily Traffic for Minor Facilities for MAP-21 Reporting and Statewide Safety Analysis
    Unnikrishnan, Avinash ;
    Figliozzi, Miguel
    2018-06-01 | PDF
    This research project develops a simple and reliable method to estimate AADT on non-state roadway segments. Two separate analysis was conducted - non-state upper functional classification roadway segments with AADT less than 10000 and local roads. As the AADT varied based on location, we categorized region 2 non-state upper functional classificatio ...
  • Enhancing Landslide Inventorying Lidar Hazard Assessment and Asset Management
    Enhancing Landslide Inventorying, Lidar Hazard Assessment and Asset Management
    Leshchinsky, Ben A. ;
    Olsen, Michael J.
    2018-06-01 | PDF
    Landslides are frequent hazards that result in major economic, environmental and social impacts for operation, maintenance and construction of highways. Current landslide databases are limited and often fragmented since they are based on a variety of inventories/geologic maps from various sources, which have been mapped sporadically over time as fu ...
  • Prevention of Longitudinal Cracking in Iowa Widened Concrete Pavement
    Prevention of Longitudinal Cracking in Iowa Widened Concrete Pavement
    Ceylan, Halil ;
    Kim, Sunghwan
    2018-06-01 | PDF
    Iowa has adopted 14 ft widened concrete slabs (as opposed to the standard 12 ft concrete slabs) in jointed plain concrete pavement (JPCP) design and construction since the 1990s. The additional 2 ft slab paved beyond the normal traffic path is intended to reduce stresses and deflections at the critical concrete pavement edge location by effectively ...
  • Quantifying Salt Concentration on Pavement Phase II MARWIS and Teconer Laboratory Sensor Evaluation
    Quantifying Salt Concentration on Pavement: Phase II – MARWIS and Teconer Laboratory Sensor Evaluation
    Fay, Laura ;
    Akin, Michelle
    2018-06-01 | PDF
    This report presents the laboratory findings from an evaluation of the Lufft MARWIS and the Teconer RCM411 sensors. The study focused on each sensor’s ability to detect water film/ice depth (testing occurred at 28°F and -20°F), friction (testing occurred at 28°F), surface temperature (testing occurred at 28°F), and road condition/surface state (tes ...
  • Evaluation of Sediment Barrier Practices Using LargeScale Testing Techniques
    Evaluation of Sediment Barrier Practices Using Large-Scale Testing Techniques
    Whitman, J. Blake ;
    Zech, Wesley C.
    2018-06-01 | PDF
    Perimeter controls [i.e. sediment barriers (SBs) or sediment retention devices (SRDs)] are typically used on construction sites to retain sediment within the limits of the site and prevent polluted stormwater runoff from adversely affecting the environment by degrading aquatic habitats and clogging storm sewers. However, little data exists regardin ...
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