ISO 29061-4:2026

Road vehicles — Methods and criteria for usability evaluation of child restraint systems and their interface with vehicle anchorage systems — Part 4: Securing of child in child restraint system and daily handling aspects

Scope

This document provides criteria for judgement of usability of child restraint systems (CRS) with regard to the securing of a child in the child seat and other daily handling aspects.
This document provides criteria for judgement of:

ease of availability of instructions;
clarity of instruction manual and labelling; and
the ease of use of design related features of the CRS related to securing the child or child dummy in a CRS installed in vehicle.

This document can be used in conjunction with either ISO 29061-1 or ISO 29061-3 for making a complete usability evaluation of CRSs attached to the vehicle with ISOFIX/LATCH or vehicle seat belts.
NOTE 1        CRS includes enhanced child restraint systems (ECRS) according to UN Regulation No. 129.
NOTE 2        Booster system usability evaluation, including securing of a child in the booster system, is covered by ISO 29061-5.