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The ADS regulations (GTR and UNR) include definitions for reporting thresholds based on EDR triggering. Time-series data recording for heavy vehicles under UN R169 requires triggers and trigger thresholds to record data in specified time periods, which may not immediately precede, follow, or coincide with crashes. Last Stop, Safety Systems, and Sudden Deceleration triggers are unreliable crash indications. Sudden Deceleration is too sensitive for storing time-series data over several months. Optional SRS or a new independent trigger alongside Detected Collision offers the only viable possibility for effective time-series data recording.
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