UN R73: Proposal for the 02 series of amendments
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Proposal to amend geometrical criteria (dimensions and distances between lateral protection devices) and installation provisions for lateral protection barriers in order to improve their performance with regard to vulnerable road users. The proposal would

  1. increase the maximum distance between lateral rails from 300 mm to 400 mm
  2. redefine the limits for the lower edge from “550 mm above the ground” to definition via an isosceles triangle formed by lines drawn at 8° from the ground contact points of the vehicle tires intersecting at point “I” above the road surface where the maximum limit “I” is between 350-450 mm
  3. define the upper edge as from 450 mm rather than 300 mm maximum from the vehicle structure or maximum height of the upper edge above the ground from 950 mm to 850 mm
  4. update the horizontal static force requirement for lateral protection devices to 3 kN and the deflection under load criteria to 90 mm over the rearmost 250 mm of the device and 450 mm over the remainder of the device.
The purpose is to reduce the risk of running over a person (e.g., a motorcycle rider) during a lateral collision.

Reference Number: GRSG/2018/5
Origin: France
Date: 22 January 2018
Proposal Status: Formal GR review
Related Documents:
GRSG-113-12 | Proposal for the 02 series of amendments to UN Regulation No. 73
GRSG-113-13 | Proposal for the 02 series of amendments to UN Regulation No. 73
GRSG/2018/18 | UN R73: Proposal for the 02 series of amendments
Working Party on General Safety | Session 114 | 9-13 Apr 2018

36. GRSG recalled the evolution study of UN Regulation No. 73 from the previous session (GRSG-113-11-Rev.1). The expert from France proposed to improve the performance level of Lateral Protection Devices (LPD) for a better protection of vulnerable road users (ECE/TRANS/WP.29/GRSG/2018/5). The expert from the Russian Federation raised concerns on the lack of detailed statistical data on fatalities in the event of a lateral impact and on the impact of these amendments for vehicles in regions with specific climate and/or road conditions. The expert from OICA endorsed the concerns raised by the Russian Federation. He noted that the proposed geometrical dimensions might result in other difficulties or risks. He concluded that some derogation would be necessary for special purpose vehicles.

37. Following a detailed consideration of ECE/TRANS/WP.29/GRSG/2018/5, GRSG welcomed the offer by France to organize a dedicated meeting prior to the forthcoming GRSG session to further discuss and clarify the remaining issues.

38. GRSG agreed to resume consideration of this subject at its next session in October 2018 and requested the secretariat to keep ECE/TRANS/WP.29/GRSG/2018/5 and GRSG-113-11-Rev.1 on the agenda as reference documents.