This revision reproduces the following amendment(s):
UN R13: Proposal for Supplement 18 to the 11 series of amendments

Proposal to introduce provisions for approving single vehicles involved in modular vehicle combinations, e.g. towing trailers, “road trains” and requirements for endurance braking systems for vehicles equipped with an electric regenerative endurance braking system.

Authentic and legally binding text WP.29/2021/12