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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 5641 - 5660 of 36958 results
  • Applications of LiDAR for SDDOT
    Applications of LiDAR for SDDOT
    Liao, Yijun ;
    Mohammadi, Mohammad Ebrahim
    2019-11-05 | PDF
    Light Detection and Ranging (LiDAR) is a valuable data collection method that is increasingly being utilized within transportation agencies to replace traditional geospatial data collection methods for infrastructure with increased accuracy and better cost- and time-efficiency. This study will identify current and potential uses for LiDAR at SDDOT, ...
  • Exploring Crowdsourced Monitoring Data for Safety - Evaluation of Miovision Pedestrian Count Data [supporting datasets]
    Le, Minh
    ORCID ICON IMG
    2019-11-04 | PDF
    The data represent one week of selected hourly weekday and weekend pedestrian counts at two intersections in Austin, Texas. The pedestrian counts were produced from manually reducing video files from Miovision’s TrafficLink Multimodal Detection and Counts system. Eighty hours of video were gathered at each intersection between June 18 and July 14, ...
    Dataset Supporting Files
  • Machine Learning Tools for Informing Transportation Technology and Policy
    Machine Learning Tools for Informing Transportation Technology and Policy
    Cummings, Mary ;
    Li, Songpo
    2019-11-01 | PDF
    With rapid advances in data analytic tools, machine learning techniques are increasingly being used to study large transportation crash data sets. The objective of such approaches is to reveal underlying and potentially unknown patterns of influence between driver and pedestrian characteristics, environment factors, vehicle attributes and crash fat ...
  • Impact of Transportation on Air Quality at Elementary and Middle Schools in South Carolina
    Impact of Transportation on Air Quality at Elementary and Middle Schools in South Carolina
    Comert, Gurcan ;
    Darko, Samuel
    2019-11-01 | PDF
    Many studies have reported associations between respiratory symptoms and resident proximity to roadway traffic. However, only a few have documented the relationship between traffic volume and air quality in local areas. This study investigates the impact of traffic volume on air quality at different geographical locations in the state of South Caro ...
  • Grouting Effects on Performance of Sliplined Steel Pipes
    Grouting Effects on Performance of Sliplined Steel Pipes
    Han, Jie ;
    Rahmaninezhad, Seyed Mustapha
    2019-11-01 | PDF
    Culverts and pipes installed under roadways several decades ago are reaching the end of their service life. Excavation and replacement of these buried structures will cause disruption to their service and require significant funding. Trenchless methods (e.g., sliplining) have been increasingly used to rehabilitate deteriorated buried structures (e. ...
  • Characterizing InCab Air Quality in HeavyDuty Diesel Construction Equipment
    Characterizing In-Cab Air Quality in Heavy-Duty Diesel Construction Equipment
    Lewis, M Phil ;
    Johnson, Jeremy
    2019-11-01 | PDF
    Previous research indicates that air quality in the cabs of heavy-duty diesel equipment may exceed recommended exposure limits for certain pollutants. The objective of this case study was to collect and analyze air pollutant data near the cabs of heavy-duty diesel equipment while performing real-world activities. Using state-of-the-art instrumentat ...
  • Improved Tub Girder Details Final Report
    Improved Tub Girder Details: Final Report
    Armijos-Moya, Stalin ;
    Wang, Yang
    2019-11-01 | PDF
    Steel trapezoidal box girders, generally referred to as tub girders, have been widely used on a number of bridges throughout the State of Texas. The smooth profile of the girder systems provides an aesthetically appealing bridge that also possesses several structural advantages compared to other girder types. Due to the significant torsional stiffn ...
  • Smart Funding for Smart Infrastructure Examining and Evaluating Funding Methods for Infrastructure to Support Autonomous Vehicles
    Smart Funding for Smart Infrastructure: Examining and Evaluating Funding Methods for Infrastructure to Support Autonomous Vehicles
    Wasserman, Jacob L.
    ORCID ICON IMG
    2019-11-01 | PDF
    Self-driving cars won’t work until we change our roads,” wrote Andrew Ng, chief of research at Chinese tech giant Baidu.1 Though Ng may exaggerate, autonomous vehicles (AVs) do benefit greatly from “smart infrastructure.” Witnessing AVs’ rise, American governments have eagerly begun smart infrastructure projects, but few have developed stable metho ...
  • Life Cycle Modeling of Technologies and Strategies for a Sustainable Freight System in California
    Life Cycle Modeling of Technologies and Strategies for a Sustainable Freight System in California
    Ambrose, Hanjiro ;
    Kendall, Alissa
    2019-11-01 | PDF
    California’s freight transportation system is a vital part of the state’s economy but is a significant contributor to greenhouse gas emissions and generates an even higher portion of regional and local air pollution. The state’s primary strategy for reducing emissions from the on-road freight sector relies on deploying new vehicle and fuel technolo ...
  • Freeway Management for Optimal Reliability
    Freeway Management for Optimal Reliability
    Laval, Jorge A. ;
    Rouphail, Nagui M.
    2019-11-01 | PDF
    Improving travel time reliability is at the core of battling traffic congestion. This report summarizes the findings from a multi-institutional effort for analyzing and improving freeway travel time reliability. It first investigates the effect of incidents on freeway segment capacity, enabling the calibration and validation of the emergent travel ...
  • Crowdshipping Evaluating its Impacts on Travel Behavior
    Crowdshipping: Evaluating its Impacts on Travel Behavior
    Allahviranloo, Mahdieh ;
    Abadi, Shirin Najaf
    2019-11-01 | PDF
    The rapid emergence of direct-to-home delivery models has quickly changed the spatial and temporal distribution of both individual travelers’ trips and of urban goods movements. A growing number of household and consumer products are now being delivered directly to homes rather than being picked up in retail stores. For commercial carriers, this ne ...
  • Work Zone Materials for Temporary Signs in High Wind Areas Final Report
    Work Zone Materials for Temporary Signs in High Wind Areas: Final Report
    Qiao, Fengxiang ;
    Du, Jianbang
    2019-11-01 | PDF
    Due to ineffective ballast materials and techniques, temporary signs may easily be knocked down and become invisible to the traveling public, increasing the risk of tort liability. Signs in construction zones must be properly secured to prevent wind from blowing them off posts, and the conditions should be checked periodically to ensure specificati ...
  • Survey Results of a Pilot Sleep Study Near Atlanta International Airport
    Survey Results of a Pilot Sleep Study Near Atlanta International Airport
    Rocha, Sarah ;
    Smith, Michael G
    2019-11-01 | PDF
    Aircraft noise can disturb the sleep of residents living near airports. To investigate potential effects of aircraft noise on sleep, recruitment surveys for a pilot field study were mailed to households around Atlanta International Airport. Survey items included questions about sleep quality, sleep disturbance by noise, noise annoyance, coping beha ...
  • Variability of InLine RAP Crushing vs PreScreened RAP Stockpiles
    Variability of In-Line RAP Crushing vs. Pre-Screened RAP Stockpiles
    Mayeux, Corey R ;
    Salari, Saman
    2019-11-01 | PDF
    The Louisiana Department of Transportation and Development (DOTD) allows contractors to utilize RAP in various asphalt mixtures throughout the state. The standard specifications for roads and bridges added the following statement regarding the storing of RAP, “Keep reclaimed asphalt pavement separate from other materials at the plant in such a mann ...
  • Life Cycle Modeling of Technologies and Strategies for a Sustainable Freight System in California [supporting datasets]
    Ambrose, Hanjiro ;
    Kendall, Alissa
    2019-11-01 | PDF
    California’s freight transportation system is a vital part of the state’s economy, but generates a high portion of local pollution in parts of the state with poor air quality. In recognition of these challenges, Executive Order B-32-15 encourages adoption of advanced vehicle technologies and infrastructure, as well as the use of alternative energy ...
    Dataset Supporting Files
  • Synthesis Study Facilities Enterprise Development SponsorshipPrivatization
    Synthesis Study: Facilities (Enterprise Development, Sponsorship/Privatization)
    Iyer, Ananth V ;
    Dunlop, Steven R
    2019-11-01 | PDF
    The Indiana Department of Transportation maintains 17 rest area locations with 28 separate rest area facilities located on interstates for driver safety and convenience. Although the rest areas provide many benefits to the traveling public, the rest areas do not earn direct profits. Moreover, the Indiana Department of Transportation is increasingly ...
  • Technology Evaluation for the Technology Utilization Plan
    Technology Evaluation for the Technology Utilization Plan
    Gold, Andrea ;
    Werner, Mark
    2019-11-01 | PDF
    The Texas Technology Task Force is an external advisory board to the Texas Department of Transportation (TxDOT) that conducts technology discovery activities and delivers recommendations for advancing technology to prepare the future Texas transportation system. The Task Force is developing a Technology Utilization Plan that will serve as the fulcr ...
  • Validating Change of Sign and Pavement Conditions and Evaluating Sign Retroreflectivity Condition Assessment on Georgias Interstate Highways Using 3D Sensing Technology
    Validating Change of Sign and Pavement Conditions and Evaluating Sign Retroreflectivity Condition Assessment on Georgia’s Interstate Highways Using 3D Sensing Technology
    Tsai, Yichang (James) ;
    Wang, Zhaohua
    2019-11-01 | PDF
    Traffic signs are important for roadway safety and provide critical guidance to road users with traffic regulations, road hazard warnings, destination information, and other geographic information. Pavement surface distress data is critical for monitoring the statewide pavement conditions, identifying maintenance activities, and optimally allocatin ...
  • Stochastic MultiObjective OptimizationBased Life Cycle Cost Analysis for New Construction Materials and Technologies
    Stochastic Multi-Objective Optimization-Based Life Cycle Cost Analysis for New Construction Materials and Technologies
    Gao, Jingqin ;
    Ozbay, Kaan
    2019-11-01 | PDF
    The sustainability of transportation infrastructure depends on the adoption of new construction materials and technologies that can potentially improve performance and productivity. However, most agencies would like to evaluate these new materials and technologies at both the project and network levels before replacing the traditional ones. It also ...
  • Partial Automation for Truck Platooning
    Partial Automation for Truck Platooning
    Shladover, Steven E. ;
    Lu, Xiao-Yun
    2019-11-01 | PDF
    Researchers at California Partners for Advanced Transportation Technology (PATH), a research and development program at the University of California-Berkeley, studied the potential benefits of cooperative adaptive cruise control (CACC) by deploying the technology in a platoon of three trucks. They built the CACC system and implemented it in three l ...
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