Supplement 1 to the original version of UN R151 (GRSG/2019/25) amended the paragraph 5.3.1.4. to add an explicit requirement for the maximum detection distance. The Supplement did not intend to delete or suggest a change in the requirements for the information signal boundaries or the detection area around the front wheel. This proposal reintroduces and clarifies the requirement for the detection area around the front wheel.

42. The expert from OICA, from the IWG on VRU-Proxi, presented a proposal for amendments to UN Regulation No. 151 (GRSG-121-07 amending ECE/TRANS/WP.29/GRSG/2021/4), concerning the approval of motor vehicles with regard to the Blind Spot Information Systems, to further quantify the dimension of the detection area near the front wheel.

43. GRSG adopted ECE/TRANS/WP.29/GRSG/2021/4, as amended by GRSG-121-07, proposal for Supplement 3 to UN Regulation No. 151, and requested the secretariat to submit it for consideration and vote at the November 2021 sessions of WP.29 and AC.1.