Autonomous Trajectory Validation for Unsafe Lateral Vehicle Interactions

The patent introduces a safety validation module as an intermediary between the statistical model-based trajectory generator and the autonomous driving control system. This module checks whether generated trajectories satisfy safety constraints (such as maintaining safe distances from other vehicles, avoiding collisions, and adhering to traffic rules) before executing maneuvers. The validator acts as a mediator that filters out unsafe trajectories while preserving the adaptability benefits of statistical models.

The system performs preliminary safety validation checks on generated trajectories before they are executed. The validation process evaluates potential trajectories in advance by simulating their safety implications, checking for conflicts with other road users, and verifying compliance with safety constraints. This preliminary action prevents unsafe maneuvers from being executed, addressing the reliability concern while maintaining the versatility of statistical modeling.

The validation system applies different validation strictness levels to different spatial and contextual regions. In normal driving conditions, strict validation is applied to prevent unsafe maneuvers. However, in dangerous situations where another vehicle is already violating safety constraints (e.g., aggressive lane changes, tailgating), the system relaxes validation for trajectories that represent appropriate defensive responses. This local differentiation allows the system to prevent unsafe actions while permitting necessary reactions to external threats.

The validation criteria are made dynamic rather than static. The system continuously monitors the behavior of surrounding vehicles and adjusts the stringency of trajectory validation in real-time. When other road users exhibit unsafe behaviors, the validation thresholds are adapted to allow more aggressive defensive maneuvers. This dynamic approach ensures that safety validation remains appropriate to the current traffic context, preventing false invalidation of necessary responses.

The trajectory validation process is segmented into multiple independent check modules, each responsible for verifying specific safety aspects (e.g., collision avoidance, lane boundary compliance, safe distance maintenance, speed limits). This segmentation allows the system to perform comprehensive validation through a series of simpler, specialized checks rather than one complex monolithic validation process, reducing overall computational complexity while maintaining thorough safety verification.

The system implements a tiered validation approach where critical safety checks (such as immediate collision risk) are performed with high priority and strict criteria, while less critical checks are performed with lower priority or relaxed criteria. This partial action approach focuses computational resources on the most important safety aspects, achieving adequate validation without the full overhead of exhaustive checking of every possible parameter.