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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 4861 - 4880 of 36908 results
  • Development of Innovative Effective Training Modules and Methods for Pavement Designers for Rapid Deployment and Continuous Operation of MDPDG
    Development of Innovative & Effective Training Modules and Methods for Pavement Designers for Rapid Deployment and Continuous Operation of MDPDG
    Kim, S. Sonny ;
    Worthey, Hampton
    2020-08-01 | PDF
    The American Association of State Highway and Transportation Officials (AASHTO) Joint Task Force on Pavements – in cooperation with the National Cooperative Highway Research Program (NCHRP) and the Federal Highway Association (FHWA) – sponsored the development of an AASHTO Mechanistic-Empirical (ME) pavement design procedure. NCHRP project 1-37A pr ...
  • RealTime Work Zone Traffic Management via Unmanned Air Vehicles
    Real-Time Work Zone Traffic Management via Unmanned Air Vehicles
    Ham, Suyun ;
    Noh, Seongjin
    2020-08-01 | PDF
    Flooding poses safety hazards to motorists, emergency and maintenance crews and may cause costly damage to transportation infrastructure and its operation. Flash flooding, in particular, causes the most flood-related deaths According to the National Oceanic Atmospheric Administration (NOAA), in 2017 alone, flash flooding also caused $60.7 billion w ...
  • ABQ Streets Project Creating Alternative Residential Street Designs
    ABQ Streets Project: Creating Alternative Residential Street Designs
    Rowangould, Gregory ;
    Ferenchak, Nick
    2020-08-01 | PDF
    This research evaluates opportunities for retrofitting residential streets with alternative designs with the overall goal of improving their function, reducing their negative impacts and reducing maintenance costs. This is accomplished through three main research tasks. First, the authors conduct a comprehensive review of the street design literatu ...
  • MechanicOperator Training and Training Needs for Winter Maintenance Equipment Synthesis Report
    Mechanic/Operator Training and Training Needs for Winter Maintenance Equipment: Synthesis Report
    CTC & Associates LLC
    2020-08-01 | PDF
    Snowplow trucks operate in extreme conditions that take a toll on engines, wiring, controls, sensors, connectors, augers, conveyors, spinners and other parts exposed to extreme cold, wetness and corrosive materials. Consequently, winter road maintenance equipment may break down on the road. Road maintenance agencies have a range of protocols for de ...
  • Utilizing Archived Traffic Signal Performance Measures for Pedestrian Planning and Analysis
    Utilizing Archived Traffic Signal Performance Measures for Pedestrian Planning and Analysis
    Singleton, Patrick A. ;
    Runa, Ferdousy
    2020-08-01 | PDF
    The overall goal of this project was to explore the use of continuous pedestrian traffic signal data from the Automated Traffic Signal Performance Measures (ATSPM) system to estimate pedestrian volumes at signalized intersections. Our objectives were to identify patterns of pedestrian activity at signalized intersections, develop methods to estimat ...
  • Developing a Quality of Signal Timing Performance Measure Methodology for Arterial Operations
    Developing a Quality of Signal Timing Performance Measure Methodology for Arterial Operations
    Tian, Zong ;
    Wang, Aobo
    2020-08-01 | PDF
    The report covers the work performed under NDOT’s research contract #607-17-803, which involved the development of a quality of signal timing performance measure methodology for arterial operations. Evaluating the benefits of traffic signal re-timing is of an increasing interest to transportation policymakers, operators, and the public, as integrat ...
  • Understanding the Surprising and Oversized Use of Ridesourcing Services in Poor Neighborhoods in NYC
    Understanding the Surprising and Oversized Use of Ridesourcing Services in Poor Neighborhoods in NYC
    Garrick, Norman ;
    Atkinson-Palombo, Carol
    2020-08-01 | PDF
    For-hire vehicle trips in the five boroughs of New York City from 2014 to 2017 increased by 82 million annually (46%). This report uses factor analysis and cluster analysis to create a typology that is then used to quantify how usage patterns have evolved in different types of neighborhood. Having surged 40-fold, ridesourcing trips originating in t ...
  • Development of Pavement Temperature Prediction Model
    Development of Pavement Temperature Prediction Model
    Kassem, Emad ;
    Bayomy, Fouad M. S.
    2020-08-01 | PDF
    Pavement temperature has a significant effect on the deflection measured using the falling weight deflectometer (FWD) or traffic speed deflectometer (TSD). Pavement temperature is used to adjust the backcalculated asphalt concrete moduli or deflection at a reference temperature. The current practice is to drill holes at the mid-depth of the top asp ...
  • RealTime Early Detection and Monitoring of Flooding Using LowCost Highly Sensitivity Ultrasound Sensing of Water Level
    Real-Time Early Detection and Monitoring of Flooding Using Low-Cost Highly Sensitivity Ultrasound Sensing of Water Level
    Ham, Suyun ;
    Noh, Seongjin
    2020-08-01 | PDF
    Flooding poses safety hazards to motorists, emergency and maintenance crews and may cause costly damage to transportation infrastructure and its operation. Flash flooding, in particular, causes the most flood-related deaths According to the National Oceanic Atmospheric Administration (NOAA), in 2017 alone, flash flooding also caused $60.7 billion w ...
  • DeepLearning Based Trajectory Forecast for Safety of Intersections with Multimodal Traffic Phase II
    Deep-Learning Based Trajectory Forecast for Safety of Intersections with Multimodal Traffic (Phase II)
    Mohamed, Abduallah ;
    Qian, Kun
    2020-08-01 | PDF
    Predicting pedestrian trajectories is of major importance for several applications including autonomous driving and surveillance systems. In autonomous driving, an accurate prediction of pedestrians trajectories enables the controller to plan ahead the motion of the vehicle in an adversarial environment. For example, it is a critical component for ...
  • Development Education and Implementation of a LowCost Audio Sensorbased Autonomous Surveillance System for Smart and Connected Transportation Infrastructure Construction and Maintenance
    Development, Education, and Implementation of a Low-Cost Audio Sensor-based Autonomous Surveillance System for Smart and Connected Transportation Infrastructure Construction and Maintenance
    Lee, Yong-Cheol ;
    Choi, Jin-Woo
    2020-08-01 | PDF
    Each Department of Transportation (DOT) in the United States has to govern and oversee an enormous number of transportation construction and maintenance projects. However, since a transportation construction project entails several miles of a job site including numerous work tasks and equipment operations, it has been increasingly challenging for e ...
  • Comparison of SHRP 2 Naturalistic Driving Data to Geometric Design Speed Characteristics on Freeway Ramps
    Comparison of SHRP 2 Naturalistic Driving Data to Geometric Design Speed Characteristics on Freeway Ramps
    Brewer, Marcus A. ;
    Stibbe, Jayson
    2020-08-01 | PDF
    Shared autonomous vehicle (SAV) systems, in which autonomous vehicles (AVs) are owned by transportation network companies that offer Mobility as a Service (MaaS) to customers, are gaining considerable research attention. SAVs have the potential to reduce vehicle ownership and parking requirements, improve traffic conditions, and minimize empty-vehi ...
  • Assessing the Safety Implication of Alternative Speed Limits in California
    Assessing the Safety Implication of Alternative Speed Limits in California
    Musabbir, Sarder Rafee ;
    Zhang, Michael
    2020-08-01 | PDF
    This project combined the statewide crash data (SWIRTS) and traffic data (PeMS) to develop statistical models to determine the safety impacts of alternative speed limits on California highways. The models examined whether various factors about crashes, including average traffic speed and truck-involvement, correlated with outcomes such as crash sev ...
  • Design of Resilient Smart Highway Systems with DataDriven Monitoring from Networked Cameras
    Design of Resilient Smart Highway Systems with Data-Driven Monitoring from Networked Cameras
    Jin, Li ;
    Feng, Chen
    2020-08-01 | PDF
    This project aims to develop a systematic way to design smart highway systems with networked video monitoring and control resiliency against environment disruptions and sensor failures. On the video monitoring side, the authors investigate (1) efficient deep learning methods for extracting fine-grained local categorical traffic information from ind ...
  • Deep Reinforcement Learning Algorithm for Dynamic Pricing of Express Lanes With Multiple Access Locations
    Deep Reinforcement Learning Algorithm for Dynamic Pricing of Express Lanes With Multiple Access Locations
    Pandey, Venktesh ;
    Wang, Evana
    2020-08-01 | PDF
    This article develops a deep reinforcement learning (Deep-RL) framework for dynamic pricing on managed lanes with multiple access locations and heterogeneity in travelers’ value of time, origin, and destination. This framework relaxes assumptions in the literature by considering multiple origins and destinations, multiple access locations to the ma ...
  • AllWeather Sub50cm RadarInertial Positioning
    All-Weather Sub-50-cm Radar-Inertial Positioning
    Narula, Lakshay ;
    Iannucci, Peter A.
    2020-08-01 | PDF
    Deployment of automated ground vehicles beyond the confines of sunny and dry climes will require sub-lane level positioning techniques based on radio waves rather than near-visible-light radiation. Like human sight, lidar and cameras perform poorly in low-visibility conditions. This paper develops and demonstrates a novel technique for robust sub-5 ...
  • Experimental and Analytical Evaluation of Residual Capacity of CorrosionDamaged Prestressed Concrete Bridge Girders
    Experimental and Analytical Evaluation of Residual Capacity of Corrosion-Damaged Prestressed Concrete Bridge Girders
    Alfailakawi, Ali ;
    Roberts-Wollmann, C. L.
    2020-08-01 | PDF
    The durability of infrastructure components, such as prestressed concrete bridge beams, can be significantly affected by long-term deterioration associated with corrosion. Corrosion is a major concern for bridges in Virginia, due to the frequent use of deicing salts during the winter, as well as the number of structures in marine environments. The ...
  • The Use of Resistivity Testing for Quality Control of Concrete Mixtures
    The Use of Resistivity Testing for Quality Control of Concrete Mixtures
    Hartell, Julie Ann
    2020-08-01 | PDF
    This study proposes a new quality control and compliance method for concrete mixture design using standard surface resistivity testing. This method helps in determining key mixture parameters such as fly ash content and w/cm of placed concrete. Based on the gain in resistivity over time, it was found that the slope of the surface resistivity versus ...
  • Assessment of Composite Pavement in Virginia A Trial Section on US 60
    Assessment of Composite Pavement in Virginia: A Trial Section on US 60
    Hossain, M. Shabbir ;
    Nair, Harikrishnan
    2020-08-01 | PDF
    The Strategic Highway Research Program 2 (SHRP2) identified composite pavement as a “renewal solution” to support for implementation, and the Virginia Department of Transportation (VDOT) received funding to demonstrate its potential. In 2017, this funding was applied to support major rehabilitation of two westbound lanes of US 60 in Henrico County, ...
  • Segment and Intersection Crash Analysis Methodologies for Utah Highways
    Segment and Intersection Crash Analysis Methodologies for Utah Highways
    Schultz, Grant G. ;
    Lunt, Camille C
    2020-08-01 | PDF
    This research focuses on the Crash Analysis Methodology for Segments (CAMS) which provides a way for engineers at the Utah Department of Transportation (UDOT) to prioritize safety improvements on state-owned roadways. Unlike the Utah crash analysis methodologies that come before it, the CAMS focuses exclusively on segment-related crashes. The benef ...
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