A marked-up version of this document is also available.
Proposal to increase the potential speed reduction during the collision warning phase and clarify the interpretation of “engine start/run cycle”.
Proposal to align provisions with corresponding provisions of UN R152 and to clarify the interpretation of the provisions on system robustness when applied to heavy duty vehicles.
Proposal to revise and update UN R51 as revised by the Working Party on Noise at its September 2014 session.