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Informal Document GRSG-116-41

Document Title UN R93: Proposal for amendments
Reference Number GRSG-116-41
Origin EC
Document Date 4 April 2019
Document Posted 5 April 2019
Meeting Session(s)

44. Recalling the purpose of GRSG-115-25 presented at the previous GRSG session, the expert from EC proposed to update the provisions on frontal underrun protection to be approved as integrated part of the vehicle, and in particular, to allow more a rounded shape of cabs for better aerodynamic performance (GRSG-116-41). The proposal received general support from GRSG. The expert from OICA offered to send her contributions to the expert from EC. GRSG agreed to resume consideration of this subject at the next session on the basis of an official document.


Proposal to update Part III of UN R93 to enable approval of truck cabs where the front underrun protection is integrated in the motor vehicle (in order to improve aerodynamic performance). This proposal would define the forward reference point as being the same transverse location where the force is applied. This results in FUPs where (in the case of cab fronts that are curved) at least 400 mm must be maintained along the front contour of the cab, instead of the foremost point. The proposal includes transitional provisions from 1 September 2020.

Document Status Superseded
Related Documents
GRSG-115-25 | UN R93: Proposal for amendments
GRSG/2019/19 | UN R93: Proposal for amendments