The Data Storage System for Automated Driving (DSSAD) is a device or a function that : records and stores a set of data (“timestamped flags”) during the automated driving sequences of any vehicle equipped with Level 3 / Level 4 / Level 5 Automated Driving Systems (ADS), in order that whenever a significant safety related event occurs it can provide a clear picture of the interactions between the driver and the system, before and after (whenever possible) the event, in order to establish :
– if the driver or the system was requested to be in control of the driving task, and
– who was actually performing the driving task.
The Event Data Recorder (EDR) according to CFR 563 Event Data Recorder (EDR) means a device or function in a vehicle that records the vehicle’s dynamic time-series data during the time period just prior to a crash event (e.g., vehicle speed vs. time) or during a crash event (e.g., delta-V vs. time), intended for retrieval after the crash event.
Preliminary Considerations
The IEEE-1616.1 preliminary considerations are based on the principle that EDR and DSSAD should not be mixed or overlapping, in terms of functions, and in terms of concept as well: The EDR function should continue to be developed, within an unchanged spirit, as “focused on accident reconstruction”, and as so, should remain a mean to record a batch of retrievable and relevant sampled continuous data, during the very short period preceding a crash, triggered by a specific event, and dedicated to a wide variety of vehicles, independently of their fitment with any Automated Driving function, while the DSSAD function should newly address a very complementary but different function, “focused on the determination of interactions between an Automated Driving function and the human driver who may engage and disengage it”, and as so, should be a mean to continuously record a batch of retrievable and relevant timestamped data entries, on a continuous basis, not triggered by any specific event, and to keep them retrievable for an extended period.