Dynamic driving task fallback
Added:25/10/2024
Contributor:FAME
Current consensus
Dynamic driving task fallback is the response by the user to either perform the DDT or achieve a minimal risk condition after occurrence of a DDT performance-relevant system failure(s), or Some Level 3 features upon operational design domain (ODD) exit, or the response by an ADS to achieve minimal risk condition, given the same circumstances.
Explanation
- Number
- Regarding minimal risk condition, the DDT and the DDT fallback are distinct functions, and the capability to perform one does not necessarily entail the ability to perform the other. Thus, a Level 3 ADS, which is capable of performing the entire DDT within its ODD, may not be capable of performing the DDT fallback in all situations that require it and thus will issue a request to intervene to the DDT fallback-ready user when necessary
- Some Level 3 features may be designed to automatically perform the fallback and achieve a minimal risk condition in some circumstances, such as when an obstacle-free, adjacent shoulder is present, but not in others, such as when no such road shoulder is available. The assignment of Level 3 therefore does not restrict the ADS from automatically achieving the minimal risk condition, but it cannot guarantee automated achievement of minimal risk condition in all cases within its ODD. Moreover, automated minimal risk condition achievement in some, but not all, circumstances that demand it does not constitute Level 4 functionality.
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