The Virginia Tech Transportation Institute (VTTI) conducts research to save lives, save time, save money and protect the environment. Researchers and students from multiple fields are continuously developing the techniques and technologies to solve transportation challenges from vehicular, driver, infrastructure and environmental perspectives.

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  • A Catalog of Health and Wellness Programs for Commercial Drivers 

    Glenn, T. Laurel; Mabry, J. Erin; Hickman, Jeffrey S. (National Surface Transportation Safety Center for Excellence, 2022-12-08)
    The purpose of this study was to identify, review, and document existing CMV driver H&W programs and to identify industry best practices. The study began with a thorough literature review to understand the common medical ...
  • Impact of Solid State Roadway Lighting on Melatonin in Humans 

    Gibbons, Ronald B.; Bhagavathula, Rajaram; Warfield, Benjamin; Brainard, George C.; Hanifin, John P. (MDPI, 2022-11-18)
    Introduction: In 2009, the World Health Organization identified vehicle crashes, both injury-related and fatal, as a public health hazard. Roadway lighting has long been used to reduce crashes and improve the safety of all ...
  • Adaptive Control of the Atmospheric Plasma Spray Process for Functionally Graded Thermal Barrier Coatings 

    Guduri, Balachandar; Batra, Romesh C. (Hindawi, 2022-11-23)
    Functionally graded coatings (FGCs) have a material composition continuously varying through the thickness but uniform in the surface parallel to the coated substrate. When used as a thermal barrier on a metallic substrate, ...
  • Camera-based Feature Identification for EasyMile Operation 

    Sarkar, Abhijit; Sundharam, Vaibhav; Manke, Aditi; Grove, Kevin (National Surface Transportation Safety Center for Excellence, 2022-11-15)
    The EasyMile deployment studied in this work included cameras that captured the 360 degrees of roadway environment around the vehicle. We developed a scene perception algorithm using computer vision technology to track ...
  • Effectiveness of Lighted Work Zone Apparel: Effects on Visibility 

    Bhagavathula, Rajaram; Kassing, Andrew; Gibbons, Ron; Medina, Alejandra (National Surface Transportation Safety Center for Excellence, 2022-11-11)
    In United States, collisions between vehicles and workers in a work zone are a major problem. In 2020, there were 157 worker fatalities in work zone in the United States. Increasing worker conspicuity has the potential to ...
  • Unravelling the Complexity of Irregular Shiftwork, Fatigue and Sleep Health for Commercial Drivers and the Associated Implications for Roadway Safety 

    Mabry, J. Erin; Camden, Matthew; Miller, Andrew; Sarkar, Abhijit; Manke, Aditi; Ridgeway, Christiana; Iridiastadi, Hardianto; Crowder, Tarah; Islam, Mouyid; Soccolich, Susan; Hanowski, Richard J. (MDPI, 2022-11-10)
    Fatigue can be a significant problem for commercial motor vehicle (CMV) drivers. The lifestyle of a long-haul CMV driver may include long and irregular work hours, inconsistent sleep schedules, poor eating and exercise ...
  • Exploration of U.S. National Pedestrian Traffic Crashes 

    Witcher, Christina; Henry, Scott; Sullivan, Kaye (National Surface Transportation Safety Center for Excellence, 2022-11-07)
    The number of pedestrian traffic fatalities in the U.S. has been increasing since 2009, following a general decline for several decades, while the number of non-fatally injured pedestrians in traffic crashes remained ...
  • Safety and Crash Risks with Vehicle Strings 

    Li, Eric; Gibbons, Ronald B.; Kim, Bumsik (National Surface Transportation Safety Center for Excellence, 2022-11-03)
    In the course of many previous studies on nighttime safety, the research team came to believe that there is a potential safety benefit of cars traveling in stabilized strings during free-flow conditions. Recent technical ...
  • Initial Investigation of Intersection Lighting 

    Bhagavathula, Rajaram; Gibbons, Ronald B. (National Surface Transportation Safety Center for Excellence, 2022-10-31)
    Nighttime crashes at intersections are a major traffic safety concern in the United States. Although providing lighting at intersections has proved to be a successful intervention against night crashes, current approaches ...
  • Autonomous Delivery Vehicle as a Disruptive Technology: How to Shape the Future with a Focus on Safety? 

    Das, Subasish; Tsapakis, Ioannis; Wei, Zihang; Elgart, Zachary; Kutela, Boniphace; Vierkant, Valerie; Li, Eric (SAFE-D: Safety Through Disruption National University Transportation Center, 2022-09)
    The National Highway Traffic Safety Administration recently granted permission to deploy low-speed autonomous delivery vehicles (ADVs) on roadways. Although the mobility of ADVs is limited to low-speed roads and these ...
  • The Future of Parking: Safety Benefits and Challenges 

    Gurbuz, Okan; Aldrete, Rafael M.; Salgado, David; Ostos, Mario Vazquez; Madrid, Danielle (SAFE-D: Safety Through Disruption National University Transportation Center, 2022-09)
    Although parking facilities are one of the main components of transportation infrastructure, little is known about the incidence of parking-related crashes, injuries, and fatalities. Slower speeds in parking facilities ...
  • Signal Awareness Applications 

    Mollenhauer, Mike; Viray, Reginald; Doerzaph, Zac; White, Elizabeth; Song, Miao (SAFE-D: Safety Through Disruption National University Transportation Center, 2022-09)
    Intersection collisions account for 40% of all crashes on U.S. roadways. It is estimated that 165,000 accidents, which result in approximately 800 fatalities annually, are due to vehicles that pass through intersections ...
  • Impact of Highly Automated Vehicle (L4/5 AV) External Communication on Other Road User Behaviors 

    Rossi-Alvarez, Alexandria I.; Grove, Kevin; Klauer, Sheila "Charlie"; Miles, Melissa; Schaudt, Andy; Doerzaph, Zac (SAFE-D: Safety Through Disruption National University Transportation Center, 2022-10)
    The advancement of SAE Level 4+ Automated Vehicles (L4/5 AVs) has led numerous stakeholders to develop external communication systems for these vehicles. Most research on vehicles emulating these displays has been conducted ...
  • The Assessment of New Roadway Lighting in Rain and Fog 

    Williams, Brian; Gibbons, Ronald B. (National Surface Transportation Safety Center for Excellence, 2022-10-27)
    This study sought to determine if different types of roadway lighting performed differently in rain or fog. The performance of the lighting was determined by participants’ ability to detect different objects along the ...
  • Fleet-based Driver Monitoring Systems: Accelerating Commercial Motor Vehicle and Occupational Driver Acceptance of Driver-facing Cameras 

    Camden, Matthew C.; Glenn, T. Laurel; Manke, Aditi; Hanowski, Richard J. (National Surface Transportation Safety Center for Excellence, 2022-10-14)
    Driver monitoring systems (DMSs) are an in-vehicle technology with promise to improve transportation safety for commercial motor vehicle (CMV) and occupational light vehicle drivers. DMSs include various sensors and cameras ...
  • Safety Benefits of a Carrier-implemented Sleep Apnea Program for Commercial Motor Vehicle Drivers 

    Mabry, J. Erin; Glenn, T. Laurel; Soccolich, Susan; Hickman, Jeffrey S.; Durmer, Jeffrey (National Surface Transportation Safety Center for Excellence, 2022-10-11)
    The Virginia Tech Transportation Institute (VTTI) collaborated with a leading third-party population sleep health provider, Fusion Health, and two for-hire carriers to perform an independent analysis of the safety benefits ...
  • Challenges in Conducting Empirical Epidemiological Research with Truck and Bus Drivers in Diverse Settings in North America 

    Soccolich, Susan; Ridgeway, Christie; Mabry, J. Erin; Camden, Matthew C.; Miller, Andrew; Iridiastadi, Hardianto; Hanowski, Richard J. (MDPI, 2022-09-30)
    Over 6.5 million commercial vehicle drivers were operating a large truck or bus in the United States in 2020. This career often has high stress and long working hours, with few opportunities for physical activity. Previous ...
  • Large Truck Safety at Highway Railroad Grade Crossings: Developing a Naturalistic Commercial Motor Vehicle Database of Railroad Grade Crossings 

    Camden, Matthew C.; Manke, Aditi; Soccolich, Susan A.; Islam, Mouyid; Medina-Flintsch, Alejandra; Feierabend, Neal; Alemayehu, Desta (National Surface Transportation Safety Center for Excellence, 2022-10-12)
    In 2021, there were 2,131 collisions, 237 fatalities, and 653 injuries at highway-railroad grade crossings (RGCs). However, these data do not include the full scope of incidents at RGCs, as they do not account for ...
  • Policy and industry implications of the potential market penetration of electric vehicles with eco-cooperative adaptive cruise control 

    Bas, Javier; Zofio, Jose L.; Cirillo, Cinzia; Chen, Hao; Rakha, Hesham A. (Pergamon-Elsevier, 2022-10)
    The Eco-Cooperative Adaptive Cruise Control (Eco-CACC) makes use of an algorithm to compute energy-optimized speed profiles within the vicinity of signalized intersections. We conduct a stated choice experiment to unveil ...
  • Development and Testing of an Integrated, Versatile, Bicycle-Based Data Acquisition System 

    Owens, Justin M.; Alden, Andrew; Antin, Jon; Gibbons, Ronald B. (National Surface Transportation Safety Center for Excellence, 2022-09-27)
    The goal of this study was to develop and demonstrate the effectiveness of a novel bicycle data acquisition system (bikeDAS) to extend the Virginia Tech Transportation Institute’s expertise in instrumentation and naturalistic ...

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