ADS Hand-Over Control Using Partial Driver Readiness Evaluation
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Solution Overview
Problem
Current solutions for hand-over from Automated Driving Systems (ADS) to vehicle drivers lack reliability and safety, particularly in scenarios where ADS performance is limited or degraded, necessitating a direct and efficient assessment of the driver's ability to retake control.
Innovation Solution
A method for managing hand-over from ADS to a vehicle driver, where the ADS feature is associated with pre-cautionary constraints. The method involves obtaining a request to deactivate the ADS, providing partial control of the vehicle to the driver, monitoring and evaluating the driver's manual operation against pre-set constraints, and either deactivating these constraints for full driver control or reverting control to the ADS if the evaluation fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ADS feature controls the vehicle with pre-cautionary constraints, then safety is improved, but driver readiness assessment is insufficient
Solution Approach 1:
The system performs preliminary evaluation of driver readiness by providing partial control and monitoring driver operation against pre-cautionary constraints before full handover. This preliminary action ensures the driver is actually ready to take control, improving the precision of readiness assessment while maintaining safety through the constraint-based evaluation process.
2Measurement precision
If partial control is provided to the driver with pre-cautionary constraints, then driver ability assessment is improved, but control transition complexity increases
Solution Approach 1:
The control transition is segmented into distinct phases: ADS full control, partial driver control with monitoring, and full driver control. This segmentation allows systematic assessment of driver ability at each stage while managing complexity through structured progression. The pre-cautionary constraints are applied selectively at different stages, making the complex transition process more manageable and evaluable.
Solution Approach 2:
The pre-cautionary constraints act as an intermediary mechanism during the transition from ADS to full driver control. They provide a structured framework for evaluating driver readiness without requiring direct, unmediated handover. This intermediary layer enables precise assessment while simplifying the overall transition management.
3Reliability
If manual driver operation is monitored and evaluated against constraints, then hand-over reliability is improved, but system complexity increases
Solution Approach 1:
The pre-cautionary constraints module serves multiple functions: it limits ADS operation, evaluates driver readiness during partial control, and provides evaluation criteria for handover decisions. This multi-functionality improves handover reliability without proportionally increasing system complexity, as the same constraint framework is reused across different operational phases.
Data Source
AI summary
A method for managing a hand-over from an Automated Driving System (ADS) to driver of vehicle, where ADS includes ADS feature being associated with first set of pre-cautionary constraints out of plurality of pre-cautionary constraints imposed by Pre-cautionary Safety (PCS) module while ADS feature controls vehicle. The method includes obtaining request to deactivate ADS feature, and providing partial control of vehicle to driver in order to enable manual driver operation of vehicle based on obtained request. The method includes monitoring manual driver operation of vehicle for a time period, and evaluating monitored manual driver operation of vehicle against second set of pre-cautionary constraints during time period. Then, based on evaluation, the method includes deactivating second set of pre-cautionary constraints upon expiry of time period if manual driver operation passes evaluation, or providing control of vehicle to ADS if manual driver operation fails evaluation.