Safe Motion Planning for Autonomous Driving using an Adversarial Road Model
This addresses safety in autonomous driving, particularly for scenarios with limited prediction capabilities, though it appears incremental as it builds on existing viability theory and optimization methods.
The paper tackles safe motion planning for autonomous vehicles by formulating a game-theoretic approach with an adversarial road model, resulting in an optimization-based planner that successfully drives on city and country roads with shorter prediction horizons than baselines.
This paper presents a game-theoretic path-following formulation where the opponent is an adversary road model. This formulation allows us to compute safe sets using tools from viability theory, that can be used as terminal constraints in an optimization-based motion planner. Based on the adversary road model, we first derive an analytical discriminating domain, which even allows guaranteeing safety in the case when steering rate constraints are considered. Second, we compute the discriminating kernel and show that the output of the gridding based algorithm can be accurately approximated by a fully connected neural network, which can again be used as a terminal constraint. Finally, we show that by using our proposed safe sets, an optimization-based motion planner can successfully drive on city and country roads with prediction horizons too short for other baselines to complete the task.