GAR | GRSG-131-07

GRSG-131-07

UN R169: Proposal for a Supplement 3

Source(s)

EDR-DSSAD

Date

8 Apr 2026

Status

Informal GR review

Subject

UN R169 EDR-Heavy vehicles

Meeting(s)

GRSG | Session 131 | 13-17 Apr

Agenda item 9. (b) UN Regulation No. 169 (Event Data Recorder for Heavy-Duty Vehicles)

Proposal to amend UN R169 by inserting definitions for non-volatile and volatile memory, and modifying the Last Stop trigger criteria. The amendment allows threshold criterion (a) data to be written to volatile memory only, transferring to non-volatile memory when other triggers occur or the master control switch deactivates. This reduces memory wear in vehicles with frequent stops exceeding 20 seconds.

Downloads

UNECE server

Related documents

Excerpts from session reports

GRSG | Session 131 | 13-17 Apr

31. The expert from the Kingdom of the Netherlands on behalf of IWG on Event Data Recorder/Data Storage System for Automated Driving (EDR/DSSAD) introduced ECE/TRANS/WP.29/GRSG/2026/21, to clarity for approval of vehicle types with a maximum mass between 8,000 and 12,000 kg.. GRSG adopted ECE/TRANS/WP.29/GRSG/2026/21, not amended. The secretariat was requested to submit ECE/TRANS/WP.29/GRSG/2026/21 as draft Supplement 2 to the original version of UN Regulation No. 169 for consideration and vote at the November 2026 sessions of WP.29 and AC.1.
32. The expert from the Kingdom of the Netherlands presented GRSG-131-07, aligned with the Step 2 workstream, and announced that it would be further developed by the IWG. He also invited comments to support the preparation of an official proposal for the October 2026 GRSG session.