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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 5081 - 5100 of 36908 results
  • Assessing Alternative Approaches for Conveying Automated Vehicle ‘Intentions' [supporting datasets]
    Virginia Tech Transportation Institute  ...
    2020-05-01 | PDF
    One of the biggest highly automated vehicle (HAV) market barriers may be a lack of user trust in the automated driving system itself. Research has shown that this lack of faith in the system primarily stems from a lack of system transparency while the vehicle is in motion—users are not informed how the car will react in an upcoming scenario—and not ...
    Dataset Supporting Files
  • PhysicsBased Sensor Models for Virtual Simulation of Connected and Autonomous Vehicles
    Physics-Based Sensor Models for Virtual Simulation of Connected and Autonomous Vehicles
    Negrut, Dan ;
    Serban, Radu
    2020-05-01 | PDF
    This document contains the final project report for the SAFER-SIM project titled “Physics-Based Sensor Models for Virtual Simulation of Connected and Autonomous Vehicles.” The report includes discussion of sensors models for simulation autonomous vehicles, and overviews the simulation framework developed in accordance with the project. The framewor ...
  • Best Practices For Installation Of Rectangular Rapid Flashing Beacons With And Without Median Refuge Islands
    Best Practices For Installation Of Rectangular Rapid Flashing Beacons With And Without Median Refuge Islands
    Monsere, Christopher M. ;
    Kothuri, Sirisha
    2020-05-01 | PDF
    Over the last decade, Oregon jurisdictions have systematically installed pedestrian crossing enhancements (PCEs) at crosswalks including rectangular rapid flashing beacons (RRFBs), which have been widely used in many jurisdictions, typically at mid-block locations. However, the design details vary widely. The objectives of this research are to deve ...
  • Evaluating the Traffic and Emissions Impacts of New York City Cordon Pricing
    Evaluating the Traffic and Emissions Impacts of New York City Cordon Pricing
    Baghestani, Amirhossein ;
    Tayarani, Mohammad
    2020-05-01 | PDF
    Traffic congestion is a major challenge in metropolitan areas due to economic and negative health impacts. Several strategies have been tested all around the globe to relieve traffic congestion and minimize transportation externalities. Congestion pricing is among the most cited strategies with the potential to manage the travel demand. This study ...
  • The Impact of Driver’s Mental Models of Advanced Vehicle Technologies on Safety and Performance [supporting datasets]
    Gaspar, John G ;
    Carney, Cher
    2020-05-01 | PDF
    Advanced driver assistance systems (ADAS) are rapidly being introduced across automobile manufacturer lineups. These technologies have the potential to improve safety, but they also change the driver-vehicle relationship—as well as their respective roles and responsibilities. To maximize safety, it is important to understand how drivers’ knowledge ...
    Dataset Supporting Files
  • ConstructionReady Digital Terrain Models
    Construction-Ready Digital Terrain Models
    Catchings, Rachel ;
    Waddle, Steven
    2020-05-01 | PDF
    Since 2009, Kentucky has made its 3D design data available as a supplemental reference to bidders through the project delivery process. This research discusses methods for ensuring electronic engineering data (EED) — and specifically the proposed digital terrain model (DTM) — support modern construction management methods at the Kentucky Transporta ...
  • Multiagent Simulationbased Virtual Test Bed Ecosystem MATSim NYC
    Multi-agent Simulation-based Virtual Test Bed Ecosystem: MATSim- NYC
    Chow, Joseph Y J ;
    Ozbay, Kaan
    2020-05-01 | PDF
    One of the missions of C2SMART is to help cities around the country better understand the transferability of transportation technologies. For this purpose, two yearlong projects were initiated from 2018 – 2020 to initiate a new virtual test bed ecosystem: (1) 2018 – 2019: Phase I: Open Source Multi-Agent Virtual Simulation Testbed and (2) 2019 – 20 ...
  • The Impact of Drivers Mental Models of Advanced Vehicle Technologies on Safety and Performance
    The Impact of Driver’s Mental Models of Advanced Vehicle Technologies on Safety and Performance
    Gaspar, John G ;
    Carney, Cher
    2020-05-01 | PDF
    Advanced driver assistance systems (ADAS) are rapidly being introduced across automobile manufacturer lineups. These technologies have the potential to improve safety, but they also change the driver-vehicle relationship—as well as their respective roles and responsibilities. To maximize safety, it is important to understand how drivers’ knowledge ...
  • Horizontal Curve Evaluation Handbook
    Horizontal Curve Evaluation Handbook
    Pratt, Michael P. ;
    Geedipally, Srinivas R.
    2020-05-01 | PDF
    Horizontal curves are a common and essential element of the rural highway system, and it is essential to sign and mark them consistently to minimize curve crash risk. Curve signing and marking consists primarily of conducting an engineering study to set the curve advisory speed, posting the advisory speed if necessary, and providing other signs and ...
  • ADA Accessible Trail Improvement With Naturally Occurring Sustainable Materials
    ADA Accessible Trail Improvement With Naturally Occurring, Sustainable Materials
    Sleep, Matthew ;
    Matzen, Damian
    2020-05-01 | PDF
    The Americans with Disabilities Act (ADA) provides specific guidelines and requirements that must be met in terms of accessibility. However, in the case of unpaved trails, the requirements are less defined. An ADA trail must be firm, stable and slip resistant. Some compacted aggregate material may meet this definition, but degrade over time and can ...
  • Field Performance of HES Class 50AF Concrete With Fibers As FieldCast Connection Between Deck BulbT Girders in ABC Applications
    Field Performance of HES Class 50AF Concrete With Fibers As Field-Cast Connection Between Deck Bulb-T Girders in ABC Applications
    Ebrahimpour, Arya ;
    Mashal, Mustafa
    2020-05-01 | PDF
    Accelerated Bridge Construction (ABC) technologies are being adopted by the state departments of transportation. ABC increases public’s and worker’s safety by lowering exposure to construction activities and also increases mobility and economic opportunities by reducing traffic interruptions and delays. As an alternative to Ultra-High Performance C ...
  • Increasing Work Zone Safety Worker Behavioral Analysis With Integration of Wearable Sensors and Virtual Reality
    Increasing Work Zone Safety: Worker Behavioral Analysis With Integration of Wearable Sensors and Virtual Reality
    Ergan, Semiha ;
    Ozbay, Kaan
    2020-05-01 | PDF
    With the development of wearable technologies, an increasing number of research studies have been exploring the feasibility of using wearable sensors to send alarms to construction workers. The advancement of virtual reality (VR) enabled researchers to simulate potentially dangerous situations (e.g., speeding vehicles) in work zones without putting ...
  • Formalizing Human Machine Communication in the Context of Autonomous Vehicles
    Formalizing Human Machine Communication in the Context of Autonomous Vehicles
    Gopalswamy, Swaminathan ;
    Saripalli, Srikanth
    2020-05-01 | PDF
    There are many situations where tacit communication between drivers and pedestrians governs and enhances safety. The goal of this study was to formalize this communication and apply it to the driving strategy of an autonomous vehicle. Toward this, we performed a field study of the interaction between drivers and pedestrians. Vehicles were instrumen ...
  • Alternative Methods for Deicing
    Alternative Methods for Deicing
    Fay, Laura ;
    Clouser, Karalyn
    2020-05-01 | PDF
    The goal of this project was to aid winter maintenance managers in better understanding the performance and impacts of alternative methods for deicing, which may be non-chloride based deicers, blends of deicing products, or methods that reduce the number of applications or application rates of deicers. To achieve this, a literature review, survey, ...
  • Assessment of Safety Benefits of Technologies to Reduce Pedestrian Crossing Fatalities at Midblock Locations
    Assessment of Safety Benefits of Technologies to Reduce Pedestrian Crossing Fatalities at Midblock Locations
    Ogle, Jennifer H ;
    Islam, Sababa
    2020-05-01 | PDF
    In 2015, South Carolina ranked third in the nation in pedestrian fatalities per 100,000 population. Out of 979 total motor vehicle fatalities, 123 involved pedestrians, accounting for over 12% of all road user fatalities in South Carolina. While some individuals make conscious choices to walk and dwell in transit-oriented or mixed-use walkable comm ...
  • Asphalt Mix Rejuvenators Synthesis
    Asphalt Mix Rejuvenators Synthesis
    Blanchette, Andrea ;
    Lee, Sheue Torng
    2020-05-01 | PDF
    In recent years, the asphalt industry has seen an increase in using reclaimed asphalt pavements (RAP) and recycled asphalt shingles (RAS) in new asphalt concrete pavements. Rejuvenating additives are incorporated into asphalt mixes to neutralize the effects of using higher percentages of RAP and RAS in new asphalt concrete pavements. The implementa ...
  • Sinkhole Detection With 3D Full Elastic Seismic Waveform Tomography
    Sinkhole Detection With 3-D Full Elastic Seismic Waveform Tomography
    Mirzanejad, Majid ;
    Tran, Khiem T.
    2020-05-01 | PDF
    A new 3-D full waveform inversion (FWI) method was developed, optimized, and verified using synthetic and field test data. The goal was to overcome some of the limitations of a previously developed 2-D approach. Particularly, it was expected that the 3-D FWI method could detect out-of-line voids and 3-D features (pinnacles, zones, etc.), be easier ...
  • Assessing Alternate Approaches for Conveying Automated Vehicle Intentions
    Assessing Alternate Approaches for Conveying Automated Vehicle ‘Intentions’
    Basantis, Alexis ;
    Miller, Marty
    2020-05-01 | PDF
    One of the biggest highly automated vehicle (HAV) market barriers may be a lack of user trust in the automated driving system itself. Research has shown that this lack of faith in the system primarily stems from a lack of system transparency while the vehicle is in motion—users are not informed how the car will react in an upcoming scenario—and not ...
  • Developing Secure Strategies for Vehicular Ad hoc Networks in Connected and Autonomous Vehicles
    Developing Secure Strategies for Vehicular Ad hoc Networks in Connected and Autonomous Vehicles
    Zhu, Quanyan ;
    Zimmerman, Rae
    2020-05-01 | PDF
    The research aims at developing a resilient framework to be applied to transportation systems using connected and autonomous vehicles (CAVs). This innovation potentially responds to accident rates often related to inefficient communication systems, supported by a variety of state-of-the-art safety applications. A Vehicular Ad hoc Network (VANET) is ...
  • Analysis of Electric Bus Deployments at Transit Agencies
    Analysis of Electric Bus Deployments at Transit Agencies
    Gick, Brittney N ;
    Overman, John H
    2020-05-01 | PDF
    Transit agencies across the country are turning to zero-emission electric buses at a much faster rate than school districts. This technical memorandum summarizes transit agency experiences with the purchase, operation, and support of electric buses. These experiences can help identify potential concerns for school districts planning for the use of ...
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