TransAID Deliverable D2.1: Use cases and safety and efficiency metrics

Abstract

The main objective of this Deliverable 2.1 is to describe and identify the use cases where disruptions of traffic flow are expected to be most severe because of transitions between automation levels, and to identify KPIs to evaluate those use cases. For those identifications, a state of the art literature review has been conducted, a workshop was held with road authority stakeholders, advisory board members have been consulted and experts have been interviewed. The findings have been combined to identify the relevant aspects for TransAID scenarios and Transition of Control (ToC) in general. The large number of aspects (or dimensions) affecting automated vehicle behaviour and possible trigger conditions in combination with the many uncertainties regarding those aspects and conditions (e.g. what exactly triggers a ToC or Minimum Risk Manoeuvre?), posed a challenge for the use case and scenario definitions. Through brainstorming using a template based on above mentioned aspects and conditions, TransAID has identified five generic services that can be applied to many situations. Because of their generic characteristic, these services are expected to mitigate negative impacts resulting from vehicles in Transition Areas, regardless of the uncertainties (i.e. even if certain conditions are different, the solutions still apply). As a result, an overview was created of example situations where transition of control occurs regularly and causes traffic flow disruptions. By means of detailed services and use case descriptions, the deliverable gives a comprehensive overview on (negative) traffic safety and traffic efficiency impacts, for both urban, inter-urban and motorway situations, and proposes a preliminary set of (high-level) traffic measures.