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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 7361 - 7380 of 36114 results
  • Commoditybased Approach for Evaluating the Value of Freight Moving on Texas Roadway Network
    Commodity-based Approach for Evaluating the Value of Freight Moving on Texas’ Roadway Network
    Walton, C. Michael ;
    Jiang, Nan
    2017-12-10 | PDF
    The researchers took a commodity-based approach to evaluate the value of a list of selected commodities moved on the Texas freight network. This approach takes advantage of commodity-specific data sources and modeling processes. It provides a unique way of performing commodity flow estimation and offers more disaggregated modeling results. The esti ...
  • Connecticut Statewide Transportation Study
    Connecticut Statewide Transportation Study
    Konduri, Karthik ;
    Ritter, Chloe
    2017-12-08 | PDF
    Connecticut Department of Transportation (CTDOT) has embarked on the development of a new statewide travel demand model which will enhance evaluation of a variety of new transportation policy and planning applications, including transit oriented developments, multimodal public transportation systems and commuter rail options. A key input to success ...
  • Automated Vehicles Economic Incentives for Environmental Benefits and Safety
    Automated Vehicles: Economic Incentives for Environmental Benefits and Safety
    Rubin, Jonathan ;
    Noblet, Caroline
    2017-12-05 | PDF
    Road travel in light-duty vehicles, while of great economic value to private consumers and society, also generates a range of social costs. These include environmental damage from localized and global emissions, energy security concerns from petroleum use, external accident risk, and road congestion. These social costs are addressed only partially ...
  • Humanizing Travel Investigating the User Identification of Attitude Towards and Preference for Dynamic Ridesharing Services
    Humanizing Travel: Investigating the User Identification of, Attitude Towards and Preference for Dynamic Ridesharing Services
    Zhao, Jinhua
    2017-12-03 | PDF
    Motivated by the void in research on the qualitative impact on the for-hire transportation sector, this paper examines the influence of taxi-hailing mobile apps (e-hailing) on the U.S. taxi industry, particularly their disruption of stakeholder relationships in large-city markets. We interviewed industry stakeholders in New York, San Francisco, and ...
  • The Impact of Specialized Hauling Vehicles on Pavement and Bridge Deterioration
    The Impact of Specialized Hauling Vehicles on Pavement and Bridge Deterioration
    Walton, C. Michael ;
    Murphy, Michael
    2017-12-01 | PDF
    This research study was performed to ensure that Texas complies with a Federal Highway Administration (FHWA) memo dated November 15, 2013, which requires each state to certify that it either does not permit operation of specialized hauling vehicles (SHV), or if so, it has conducted bridge load rating analyses. The research team developed and implem ...
  • Riders Opinions and an Assessment of Access to the Line
    Riders’ Opinions and an Assessment of Access to the Line
    Losada-Rojas, Lisa Lorena ;
    Gkartzonikas, Christos
    2017-12-01 | PDF
    Passenger rail is an integral part of intercity transportation networks, especially in areas where residents do not have access to a car or there are not any other options for intercity travel. The Hoosier State Train (HST) line connects five stations in Indiana with Illinois. Since 2013, the HST line faced the probability of discontinuation many t ...
  • Modeled FullFlight Aircraft Emissions Impacts on Air Quality and Their Sensitivity to Grid Resolution
    Modeled Full‐Flight Aircraft Emissions Impacts on Air Quality and Their Sensitivity to Grid Resolution
    Vennam, LP ;
    Vizuete, W
    2017-12-01 | PDF
    Aviation is a unique anthropogenic source with four‐dimensional varying emissions, peaking at cruise altitudes (9–12 km). Aircraft emission budgets in the upper troposphere lower stratosphere region and their potential impacts on upper troposphere and surface air quality are not well understood. Our key objective is to use chemical transport models ...
  • Using Mobile Device Samples to Estimate Traffic Volumes
    Using Mobile Device Samples to Estimate Traffic Volumes
    Turner, Shawn ;
    Koeneman, Pete
    2017-12-01 | PDF
    In this project, TTI worked with StreetLight Data to evaluate a beta version of its traffic volume estimates derived from global positioning system (GPS)-based mobile devices. TTI evaluated the accuracy of average annual daily traffic (AADT) volumeestimates as well as average annual hourly volume (AAHV) estimates from Streetlight Data using actual ...
  • Evaluation of Various Tack Coat Materials Using Interface Shear Device and Recommendations on a Simplified Device
    Evaluation of Various Tack Coat Materials Using Interface Shear Device and Recommendations on a Simplified Device
    Ozer, Hasan ;
    Rivera-Perez, Jose
    2017-12-01 | PDF
    The performance of pavement interface bonds affects the integrity of pavement structures. In current practice, tack coats are used to ensure sufficient bonding between asphalt concrete (AC) layers as well as AC and concrete or aggregate base layers. A tack coat is a light application of bituminous materials to an existing surface using a distributo ...
  • Optimizing Short Duration Bicycle and Pedestrian Counting in Washington State
    Optimizing Short Duration Bicycle and Pedestrian Counting in Washington State
    Nordback, Krista ;
    Johnstone, Dylan
    2017-12-01 | PDF
    Across the United States, jurisdictions are investing more in bicycle and pedestrian infrastructure, which requires non-motorized traffic volume data. While some agencies use automated counters to collect continuous and short duration counts, the most common type of bicycle and pedestrian counting is still manual counting. The objective of this res ...
  • Evaluation of High Performance Concrete Bridge Decks and Other Experimental Bridge Decks Throughout Illinois
    Evaluation of High Performance Concrete Bridge Decks and Other Experimental Bridge Decks Throughout Illinois
    Dirks, Doug
    2017-12-01 | PDF
    The Illinois Department of Transportation (IDOT) received Innovative Bridge Research and Construction (IBRC) funds from the Federal Highway Administration (FHWA) for fiscal years 2000 and 2002. These funds were used to construct High Performance Concrete (HPC) bridge superstructures and substructures using various mix designs from 2000 through 2004 ...
  • Evaluation of New or Emerging Remote Inspection Technologies for Conduits Ranging From 12 to 120 Spans
    Evaluation of New or Emerging Remote Inspection Technologies for Conduits Ranging From 12" to 120" Spans
    Masada, Teruhisa ;
    Riley, Paul
    2017-12-01 | PDF
    Traditionally, highway agencies relied mainly on man-entry approach for assessing in-service conditions of their culverts. And, this direct approach left many drainage structures unapproachable and uninspected. This is because a large number of drainage structures are often small (diameter or rise less than 4 ft), inaccessible (entrance restricted ...
  • A7 UAS Human Factors Control Station Design Standards Plus Function Allocation Training and Visual Observer
    A7 — UAS Human Factors Control Station Design Standards (Plus Function Allocation, Training, and Visual Observer)
    Pankok, Carl ;
    Bass, Ellen J.
    2017-12-01 | PDF
    The objective of the work was to develop recommendations for minimum unmanned aircraft system (UAS) control station standards and guidelines, as well as observations and recommendations for UAS pilot and visual observer (VO) training and certification guidelines. The recommendations focused on operation of fixed-wing unmanned aircraft larger than 5 ...
    Supporting Files
  • Methods for Improving Consistency between Statewide and Regional Planning Models
    Methods for Improving Consistency between Statewide and Regional Planning Models.
    Boyles, Stephen D. ;
    Bhat, Chandra
    2017-12-01 | PDF
    Given the difference in scope of statewide and MPO models, inconsistencies between the two levels of modelling are inevitable. There are, however, methods to reduce these inconsistencies. This research provides insight into the current practices of statewide modelling across the USA and presents methods to not only to quantify the inconsistencies, ...
  • Use of Infrared Thermography for the Inspection of Welds in the Shop and Field
    Use of Infrared Thermography for the Inspection of Welds in the Shop and Field
    Manuel, Michele ;
    Washer, Glenn
    2017-12-01 | PDF
    This report represents an initial, proof-of-concept study to explore the feasibility of infrared ultra-time domain (IR-UTD) technology for the detection of defects in welds. The report includes two primary sections. The first section provides some background on the technology of infrared thermography (IRT) and common methods of applying that techno ...
  • Storm Water BMP Tool Implementation Testing
    Storm Water BMP Tool Implementation Testing
    Knecht, Melanie ;
    Dietrich, Tom
    2017-12-01 | PDF
    Under project 2015-ORIL 7, a screening tool was developed to assist Local communities with selecting post-construction storm water best management practices (BMPs) to comply with the Ohio Environmental Protection Agency’s (Ohio EPA) statewide Construction General Permit for Storm Water Discharges OHC000004 (CGP). The current project involved partne ...
  • ITE Trip Generation Modification Factors for Louisiana Research Project Capsule
    ITE Trip Generation Modification Factors for Louisiana : Research Project Capsule
    Wilmot, Chester G.
    2017-12-01 | PDF
    Using data from studies conducted in the United States over the last 50-60 years, the Institute of Transportation Engineers (ITE) has published trip generation rates for different land uses. Over time, observations from new studies have been incorporated and general land uses havebeen broken down into more specific categories. However, improved acc ...
  • Study of Deicing Salt Accumulation and Transport Through a Watershed
    Study of De-icing Salt Accumulation and Transport Through a Watershed
    Herb, William ;
    Janke, Ben
    2017-12-01 | PDF
    The accumulation of chloride in surface waters and groundwater from road deicing and other sources is a growing problem in northern cities of the U.S., including the Minneapolis-St. Paul metro area. To inform mitigation efforts, the transport of chloride in surface waters of a metro-area watershed (Lake McCarrons) was studied in this project to cha ...
  • Capturing the Relationship between Social Interaction and Travel Behavior Using Smart Phones
    Capturing the Relationship between Social Interaction and Travel Behavior Using Smart Phones
    Ben-Akiva, Moshe ;
    Abou-Zeid, Maya
    2017-12-01 | PDF
    Humans are social beings, and as such their choices are affected by the way they interact with other people. Recent changes to the nature of social interaction have affected travel behavior and have led to an increasing interest in understanding the relationship between the two. Several studies have made efforts to model and quantify this relations ...
  • CutandCover Shake Table Test Program
    Cut-and-Cover Shake Table Test Program
    Kim, Kyungtae ;
    Elgamal, Ahmed
    2017-12-01 | PDF
    A series of shake table tests of a 1/9 scale shallow tunnel was performed to assess: i) overall peak dynamic response of the soilstructure system associated with different backfill conditions and thickness of overburden soil, and ii) seismic demands in terms of resultant lateral earth pressure force. The test model response was interpreted in full- ...
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