UN R93: Proposal for amendments
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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.

Reference Number: GRSG/2019/19
Origin: EC
Date: 18 July 2019
Proposal Status: Superseded
Related Documents:
GRSG-115-25 | UN R93: Proposal for amendments
GRSG-116-41 | UN R93: Proposal for amendments
GRSG-117-36 | UN R93: Comments on ECE/TRANS/WP.29/GRSG/2019/19
GRSG-117-48 | UN R93: Proposal for amendments to ECE/TRANS/WP29/GRSG/2019/19
GRSG-117-55 | Proposal based on GRSG-117-48
GRSG-118-28 | UN R93: Comments to proposals for amendments
GRSG/2020/10 | UN R93: Proposal for the 01 series of amendments
WP.29/2020/83 | UN R93: Proposal for Supplement 1
Working Party on General Safety | Session 117 | 8-11 Oct 2019

50. The expert from EC presented ECE/TRANS/WP.29/GRSG/2019/19 proposing to update the provisions on frontal underrun protection to be approved as integrated part of the vehicle, and to allow more a rounded shape of cabs for better aerodynamic performance. The expert from OICA introduced GRSG-117-36 highlighting the need for keeping exceptions for vehicles of Category G and proposed to cover the issue of the scope in a separate proposal.

51. Following detailed technical discussions and adjustment of language used (GRSG-117-55), GRSG agreed to submit it to WP.29 and AC.1 as proposal for 01 series of amendments to UN Regulation No. 93 for consideration at their June 2020 sessions and thus providing for reconsideration by GRSG at its 118th session.