GRVA-25-44
UN R13: Proposal for e-trailer amendments
Source(s)
OICA, CLCCR, and CLEPA
Date
20 May 2026
Status
Informal GR review
Subject
Meeting(s)

Proposal to delete paragraph 1.2.6. excluding e-axle trailers with e-axles providing electric propulsion and/or incorporating an electric regenerative braking system from the scope of UN R13, and add definitions of “e-axle,” “e-axle trailer,” “dynamo function,” and “e-trailer”; add special requirements for power-driven vehicles supporting e-trailer operation, e-axle trailers equipped with dynamo function, and e-trailers of category O; add requirements for electric control lines conforming to ISO 11992-2:2027; specify message support and functional compatibility; and add provisions for electric regenerative braking, dynamo function, and propulsion, including parameters such as retarder torque demand priority, propulsion force limits, overriding mode activation at speeds below 15km/h, and vehicle stability function interaction.

UNECE server
Excerpts from session reports
GRVA | Session 23 | 22-25 Sep 2025

62. The representative of CLEPA recalled the purpose of document ECE/TRANS/WP.29/GRVA/2025/15 and presented (GRVA-23-41) a revised proposal focusing on the approval the dynamo function for e-trailers. GRVA agreed with the suggestion of the representative of Japan to document the GRVA understanding that e-trailers capable of self-propulsion should not be disguised ADS trucks without drivers; GRVA clarified that the e-trailer definition was in the Resolution R.E.3 supported that understanding.
63. GRVA adopted GRVA-23-11/Rev.2 (subject to final verification in January 2026) and requested the secretariat to submit it as draft supplements to the 12, 13, 14 series of amendments to UN Regulation No. 13 (and be incorporated in the draft new 15 series) to WP.29 and AC.1 for consideration and vote at their March 2026 sessions. The Secretary informed GRVA that he had received questions from the Vice-Chair of the Working Party on the Transport of Perishable Foodstuffs (WP.11) concerning the frequency, the tension and the intensity of the electricity generated by the dynamo function.