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EDR for heavy vehicles: Proposal for guidance under the 1998 Agreement
Document GRSG/2023/14
12 January 2023
125th GRSG session (27-31 Mar 2023)
  1. Proposal from the EDR/DSSAD informal group to provide guidance on specification for EDR used in medium and heavy vehicles with regard to the minimum collection, storage, and crash survivability of crash-event data. The performance elements do not include specifications for data retrieval tools and methods which are subject to national or regional requirements.
  2. The purpose of these performance elements is to ensure that EDR record, in a readily usable manner, data valuable for effective crash investigations and for analysis of safety equipment performance. These data elements aim to improve understanding of the circumstances in which crashes and injuries occur and facilitate the development of safer vehicle designs. In this context, crashes should be understood as involving property damage and/or personal harm, including that of vulnerable road users involved in the events.
  3. Contracting Parties may but are not required to make EDR requirements mandatory for M2, M3, N2 and N3 vehicles.
Status: Formal GR review
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Previous Documents, Discussions, and Outcomes
125th GRSG session (27-31 Mar 2023)
10. (a) | Guidance on Event Data Recorder Performance Elements Appropriate for Adoption in the 1958 and 1998 Agreements Resolutions or Regulations

27. The expert from the Netherlands on behalf of the IWG on Event Data Recorder (EDR) / Data Storage system for Automated Driving Vehicles (DSSAD) introduced the status report (GRSG-125-25) of the group. He informed GRSG that the IWG had completed the light duty vehicle EDR performance elements appropriate for adoption in the 1958 and 1998 Agreement Resolutions or UN Regulations, completed UN Regulation No. 160 accordingly and DSSAD requirements within UN Regulation No. 157 (Automated Lane Keeping System). He also announced ECE/TRANS/WP.29/GRSG/2023/11, ECE/TRANS/WP.29/GRSG/2023/12 and ECE/TRANS/WP.29/GRSG/2023/15 on the acceleration data accuracy verification procedures. Moreover, he explained that the IWG had developed proposals on EDR for Heavy Duty Vehicles (HDV), as a: (a) new UN Regulation (ECE/TRANS/WP.29/GRSG/2023/13 amended by GRSG-125-07) and (b) a guidance document on EDR for HDV appropriate for adoption in 1958 and 1998 Agreement Resolutions or Regulations (ECE/TRANS/WP.29/GRSG/2023/14 amended by GRSG-125-08). He explained that the proposals were based on an existing Society of Automotive Engineers standard, data, analyses, research and contains unique triggering of acceleration, safety-systems and last stop.

28. Finally, GRSG agreed to combine ECE/TRANS/WP.29/GRSG/2023/12, as amended below, and ECE/TRANS/WP.29/GRSG/2021/32 as amended by GRSG-122-35 and submit them as proposal for amending the Guidance on EDR Performance Elements to the November 2023 session of WP.29 for information only. Moreover, it was agreed to send ECE/TRANS/WP.29/GRSG/2023/14 and GRSG-125-08 to the IWG for reconsideration.

Annex 1, Table 1, amend to read:

Longitudinal acceleration
(post-crash)		If Recorded0–250 ms or 0 to End of Event Time plus 30 ms, whichever is shorter.500-50 to 50g/- 10%101gPlanar
Footnote 11, the reference to paragraph 6.1.5., correct as 4.1.5.

10. (c) | New UN Regulation on Event Data Recorder for Heavy Duty Vehicles
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GRSG-125-08
Relates to UN R169 |
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