GRVA-20-32
UN R13: Proposal to amend trailer and towing-vehicle compatibility requirements
Source(s)
CLEPA and OICA
Date
24 Sep 2024
Status
Informal GR review
Subject
Meeting(s)

Proposal to address loss of trailer friction braking efficiency due to increased use of robust endurance braking systems and electrification of trucks. The number of trucks with strong endurance braking systems and increasing electrification of vehicles with more efficient energy recuperating systems reduces the use of friction brakes. As a result, brake pads and linings in some commercial vehicles do not reach a temperature that is needed for the development of optimum brake performance. In particular in trailers, a loss of brake force develops due to brake pads and linings losing effectiveness – they “fall asleep” and need to be replaced although they are not worn out.

UNECE server
Excerpts from session reports
GRVA | Session 20 | 23-27 Sep 2024

100. The representative of CLEPA proposed (GRVA-20-32) an amendment of paragraph 1.1 in Annex 10 of UN Regulation No. 13 to address the situation when trailers are not used often, and brake pads are glazing as they don’t heat up. The representative of Denmark provided comments. The representative of France agreed to study the proposal.
101. GRVA requested the secretariat to distribute GRVA-20-32 with an official symbol at its January 2025 session.