Proposal for extension of the scope of UN R157 to include medium and heavy vehicles.

Proposal from GRVA to expand the scope to include N category vehicles and to apply the minimum performance for service braking systems (5 m/s²) as required in the 11 series of amendments to UN Regulation No. 13, for vehicles of the Categories M2, M3, N2 and N3 and to clarify provisions for ALKS response to emergency vehicles and interpretation of the term ‘detectable collision’.