This study presents the lessons learned from a comprehensive literature review, engagement with highway infrastructure owners and operators (IOOs) and summary of interviews with industry experts and key stakeholders to document the potential impact of automated vehicles (AVs) on highway infrastructure. The study identifies the state of the practice among IOOs, gaps in knowledge, agency-preparedness levels for AVs as well as several aspects of roadway infrastructure including the quality and uniformity of traffic control devices and the potential impact on the infrastructure and street design. For this research, studies on the impact of Automated Driving Systems (ADS) were used to understand how the infrastructure may support the deployment of AVs. National stakeholder engagement workshops were held in conjunction with the American Association of State Highway and Transportation officials (AASHTO) Committee on Maintenance Workshop in Grand Rapids, MI, on July 17, 2019, and the Transportation Research Board (TRB) Automated Vehicle Symposium in Orlando, FL, on July 18, 2019.
This project identified the following research needs and suggestions from stakeholder interviews concerning uncertainties regarding AV deployment and the potential mix with human-driven vehicles.