Härtill 2 uppsatser

Licentiatavhandling (sammanfattning) Göteborg : Chalmers tekniska högskola, 2020

Safe vehicle automation can be achieved through a detailed understanding of drivers’ ability to respond to a safety-relevant event after a period of automated driving. For instance, there is a need to understand in which scenarios automation effects are present (e.g. delayed response, degraded driving performance, crashing). Further, there is a need to identify specific factors (e.g. test environment, system-prompts, hands-on-wheel requirement, automation duration) that contribute to or prevent these automation effects. The aim of this thesis is to investigate factors that influence: (a) automation effects in a non-prompted (i.e. absence of warning/notification) safety-relevant event during assisted driving and (b) automation aftereffects (i.e. automation effects specifically occurring after automation has been deactivated) in a prompted safety-relevant event during unsupervised automation. Two Wizard-of-Oz test-track experiments were performed in order to investigate the driver response process in safety-relevant events. In experiment 1, the drivers were required to supervise (with or without a hands-on-wheel requirement) an assisted driving system, and then respond to a safety-relevant event that was not prompted by the system. In experiment 2, the drivers drove manually (baseline) and with an unsupervised automation system (a short and a long duration) before encountering a safety-relevant event. The automation system prompted (issued a take-over request) the driver to resume manual driving shortly before the safety-relevant event became visible.