Proposes additional requirements for LPD installation on vehicles equipped with blind spot information systems are specified.

Proposal aims to make extendible trailers conform to all lateral protection requirements for trailers regardless of length, in order to remove the safety risk to vulnerable road users when the trailer is in the fully extended position. This is achieved by the removal of section 13.1.1. and 16.1.1 that specify some exemptions to requirements when the trailer is extended.

Proposal to amend UN R73 on Lateral Protection Devices, amending ECE/TRANS/WP.29/GRSG/2024/38. The proposal adds safety requirements including a new definition of Blind Spot Information System referencing UN R151. Key modifications lower the minimum height of the lower edge of LPD from 550 mm to 450 mm for most vehicles, while maintaining 550 mm for vehicles with axle distance exceeding 6.5 m. The proposal includes transitional provisions and references GRSG-113-13. Japan and France submitted this based on traffic accident data showing reduced fatalities with lower LPD height requirements.