Now showing items 1-20 of 543

    • Commercial Motor Vehicle Crash Risk by Time of Day 

      Camden, Matthew C.; Soccolich, Susan A.; Hickman, Jeffrey S.; Rossi-Alvarez, Alexandria; Hanowski, Richard J. (National Surface Transportation Safety Center for Excellence, 2020-11-16)
      Despite a plethora of research examining commercial motor vehicle (CMV) crash risk as a function of time of day, there are few studies that have included objective measures of exposure. The purpose of this study was to use ...
    • Response of Autonomous Vehicles to Emergency Response Vehicles (RAVEV) 

      Nayak, Abhishek; Rathinam, Sivakumar; Gopalswamy, Swaminathan (SAFE-D: Safety Through Disruption National UTC, 2020-06)
      The objective of this project was to explore how an autonomous vehicle identifies and safely responds to emergency vehicles using visual and other onboard sensors. Emergency vehicles can include police, fire, hospital and ...
    • Big Data Visualization and Spatiotemporal Modeling of Risky Driving 

      Jahangiri, Arash; Marks, Charles; Machiani, Sahar Ghanipoor; Nara, Atsushi; Hasani, Mahdie; Cordova, Eduardo; Tsou, Ming-Hsiang; Starner, Joshua (SAFE-D: Safety Through Disruption National UTC, 2020-07)
      Statistical evidence shows the role of risky driving as a contributing factor in roadway collisions, highlighting the importance of identifying such driving behavior. With the advent of new technologies, vehicle kinematic ...
    • Assessing Alternate Approaches for Conveying Automated Vehicle ‘Intentions’ 

      Basantis, Alexis; Miller, Marty; Doerzaph, Zachary; Neurauter, Luke (SAFE-D: Safety Through Disruption National UTC, 2020-05)
      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 ...
    • Development of Analytic Method to Determine Weaving Patterns for Safety Analysis near Freeway Interchanges with Access Management Treatments 

      Dastgiri, Maryam Shirinzadeh; Dixon, Karen K. (SAFE-D: Safety Through Disruption National UTC, 2020-07)
      Urban arterials near freeway interchanges are vital elements of urban road infrastructures. They connect freeway network with high mobility and low access to urban network with lower mobility and higher access. This study ...
    • Developing a Web-Based Return-on-Investment Calculator for Truck Safety Technologies 

      Camden, Matthew C.; Medina-Flintsch, Alejandra; Hickman, Jeffrey S.; Feng, Xueting; Hanowski, Richard J. (National Surface Transportation Safety Center for Excellence, 2020-10-08)
      Although large truck advanced safety technologies such as automatic emergency braking, lane departure warning, and video-based onboard monitoring are becoming more prevalent, adoption rates and use are lagging due to ...
    • Vehicle Information Reporting Systems 

      Fitzgerald, Kaitlyn; Blanco, Myra (National Surface Transportation Safety Center for Excellence, 2020-09-22)
      The Vehicle Identification Number (VIN) standard currently tracks data elements such as manufacturing details, vehicle descriptors, vehicle security codes, and serial numbers. To date, the VIN standard does not include ...
    • Alcohol and Drug Testing: Informational Guidelines for Occupational Drivers 

      Glenn, T. L.; Camden, M. C.; Hickman, J. S. (National Surface Transportation Safety Center for Excellence, 2020-09-04)
      The Omnibus Transportation Employee Testing Act of 1991 requires all Department of Transportation (DOT) agencies to conduct drug and alcohol testing of safety-sensitive transportation employees, which includes commercial ...
    • Estimation of Traffic Stream Density Using Connected Vehicle Data: Linear and Nonlinear Filtering Approaches 

      Aljamal, Mohammad A.; Abdelghaffar, Hossam M.; Rakha, Hesham A. (MDPI, 2020-07-22)
      The paper presents a nonlinear filtering approach to estimate the traffic stream density on signalized approaches based solely on connected vehicle (CV) data. Specifically, a particle filter (PF) is developed to produce ...
    • Examining the Relationship Between CMV Driver Retention and Safety 

      Camden, Matthew C.; Soccolich, Susan A.; Hickman, Jeffrey S.; Walker, Martin; Hanowski, Richard J. (National Surface Transportation Safety Center for Excellence, 2020-08-13)
      Many segments in the trucking industry experience extremely high rates of driver turnover. Although some research has shown a link between high driver turnover and increased crash risk, it is not known if voluntary turnover ...
    • Improving Mobility for Rural Older Adults: A Program Review 

      Wotring, Brian; Antin, Jon (National Surface Transportation Safety Center for Excellence, 2020-08-07)
      The population of older adults is increasing and is expected to represent a larger proportion of the population over the next several decades. Those who live in rural areas face many transportation challenges, including a ...
    • Concrete Microstructure Characterization and Performance 

      Druta, Cristian (IntechOpen, 2020)
      Microstructural characteristics such as the interfacial transition zone (ITZ) and cracking patterns from compressive strength testing are main features that characterize concrete behavior. Certain materials such as blast ...
    • Survive the Drive: A Guide to Keeping Everyone on the Road Alive 

      Dingus, Thomas A.; Buchanan-King, Mindy (Virginia Tech Publishing, 2020-06-15)
      Driving is risky business. Only cancer, heart attacks, and strokes cause more unintentional deaths among the general population. In this book, Tom Dingus, one of the foremost authorities on driving safety, tells you how ...
    • The Assessment of Alternative Overhead Sign Lighting 

      Williams, Brian; Gibbons, Ronald B. (National Surface Transportation Safety Center for Excellence, 2020-07-22)
      This report evaluates an alternative method for lighting highway signs that takes advantage of their retroreflective properties. This method uses a single luminaire mounted some distance upstream of the sign, with a focused, ...
    • Bicycle Visibility: Conspicuity of Bicycle Headlamps, Tail Lamps, and Retroreflective Garments in Nighttime Roadway Environments 

      Bhagavathula, Rajaram; Gibbons, Ronald B.; Williams, Brian; Connell, Caroline (National Surface Transportation Safety Center for Excellence, 2020-07-21)
      Cyclist deaths are overrepresented among traffic fatalities, and increasing cyclist conspicuity to drivers could potentially reduce cyclist deaths, particularly at night. This report describes an experiment with various ...
    • Consumer Driving Automation System Education: A Learning and Retention Assessment 

      Trimble, Tammy E.; Baker, Stephanie; Russell, Sheldon; Tidwell, Scott (National Surface Transportation Safety Center for Excellence, 2020-07-08)
      For the potential safety benefits of driving automation systems to be fully realized, drivers must understand the capabilities and limitations of these systems. This study explored a range of materials that drivers may ...
    • Does the Interaction between Vehicle Headlamps and Roadway Lighting Affect Visibility? A Study of Pedestrian and Object Contrast 

      Bhagavathula, Rajaram; Gibbons, Ronald B.; Nussbaum, Maury A. (SAE International, 2020-04-14)
      Vehicle headlamps and roadway lighting are the major sources of illumination at night. These sources affect contrast-defined as the luminance difference of an object from its background-which drives visibility at night. ...
    • Identification of Railroad Requirements for the Future Automated and Connected Vehicle (AV/CV) Environment 

      Morgan, Curtis A.; Warner, Jeffery E.; Lee, Dahye; Florence, David (SAFE-D: Safety Through Disruption National University Transportation Center, 2020-06)
      The Federal Rail Administration (FRA) Highway-Rail Grade Crossing Inventory database from 2019 states that there are approximately 127,000 public, at-grade highway-rail grade crossings in the U.S. Despite this large number ...
    • Impact of Intersection Control on Battery Electric Vehicle Energy Consumption 

      Ahn, Kyoungho; Park, Sangjun; Rakha, Hesham A. (MDPI, 2020-06-19)
      Battery electric vehicle (BEV) sales have significantly increased in recent years. They have different energy consumption patterns compared to the fuel consumption patterns of internal combustion engine vehicles (ICEVs). ...
    • Empirical Study of Effect of Dynamic Travel Time Information on Driver Route Choice Behavior 

      Wang, Jinghui; Rakha, Hesham (MDPI, 2020-06-08)
      The objective of this paper is to study the effect of travel time information on day-to-day driver route choice behavior. A real-world experimental study is designed to have participants repeatedly choose between two ...