Safe by Design Autonomous Driving Systems - IMAG
Pré-Publication, Document De Travail Année : 2024

Safe by Design Autonomous Driving Systems

Marius Bozga
  • Fonction : Auteur
Joseph Sifakis
  • Fonction : Auteur

Résumé

Developing safe autonomous driving systems is a major scientific and technical challenge. Existing AI-based end-to-end solutions do not offer the necessary safety guarantees, while traditional systems engineering approaches are defeated by the complexity of the problem. Currently, there is an increasing interest in hybrid design solutions, integrating machine learning components, when necessary, while using modelbased components for goal management and planning. We study a method for building safe by design autonomous driving systems, based on the assumption that the capability to drive boils down to the coordinated execution of a given set of driving operations. The assumption is substantiated by a compositionality result considering that autopilots are dynamic systems receiving a small number of types of vistas as input, each vista defining a free space in its neighborhood. It is shown that safe driving for each type of vista in the corresponding free space, implies safe driving for any possible scenario under some easy-tocheck conditions concerning the transition between vistas. The designed autopilot comprises distinct control policies one per type of vista, articulated in two consecutive phases. The first phase consists of carefully managing a potentially risky situation by virtually reducing speed, while the second phase consists of exiting the situation by accelerating. The autopilots designed use for their predictions simple functions characterizing the acceleration and deceleration capabilities of the vehicles. They cover the main driving operations, including entering a main road, overtaking, crossing intersections protected by traffic lights or signals, and driving on freeways. The results presented reinforce the case for hybrid solutions that incorporate mathematically elegant and robust decision methods that are safe by design.

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Dates et versions

hal-04829824 , version 1 (10-12-2024)

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Marius Bozga, Joseph Sifakis. Safe by Design Autonomous Driving Systems. 2024. ⟨hal-04829824⟩
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