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IFIP WG1.3 Foundations of System Specification

Talk "Proving Safety of Automated Driving Vehicles"

by Ichiro Hasuo

Tue, 25 April 2023 at 10:30 am in Paris, France

Joint work with: Clovis Eberhart, James Haydon, and others

Abstract: The talk is based on I. Hasuo, C. Eberhart, J. Haydon et al., "Goal-Aware RSS for Complex Scenarios via Program Logic," IEEE Trans. Intelligent Vehicles, to appear. https://arxiv.org/abs/2207.02387 We introduce a goal-aware extension of responsibility-sensitive safety (RSS), a recent methodology for rule-based safety guarantee for automated driving systems (ADS). Making RSS rules guarantee goal achievement -- in addition to collision avoidance as in the original RSS -- requires complex planning over long sequences of manoeuvres. To deal with the complexity, we introduce a compositional reasoning framework based on program logic, in which one can systematically develop RSS rules for smaller subscenarios and combine them to obtain RSS rules for bigger scenarios. As the basis of the framework, we introduce a program logic dFHL that accommodates continuous dynamics and safety conditions. Our framework presents a dFHL-based workflow for deriving goal-aware RSS rules; we discuss its software support, too. We conducted experimental evaluation using RSS rules in a safety architecture. Its results show that goal-aware RSS is indeed effective in realising both collision avoidance and goal achievement.