Building feedback into modelling impacts of automated vehicles:Developing a consensus model and quantitative tool

System dynamics offers a rigorous approach to modelling the sometimes-surprising dynamics endogenous in complex systems and is ideal for gaining insight into potential impacts of automation in transport. Researchers from Europe and the U.S. are developing a consensus model, starting from an impact assessment framework presented at TRA 2018 and published shortly thereafter. This paper reports on a 2019 group model building workshop, which collated the intelligence of a diverse international group of modelling, transport and liveability/equity experts, focusing on socioeconomic impacts of highly automated vehicles, from household and public authority standpoints. Subsequent work developed a general framework from which detailed system dynamics models can be created for specific research questions. The ultimate goal is to develop a quantitative tool that can help planners and policy-makers understand how highly automated vehicles may fit within the transport system, and to begin to explore consequences of potential actions under various scenarios