Foreword

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This document was prepared by Technical Committee 22, Road vehicles, Subcommittee SC 33, Vehicle dynamics, chassis components and driving automation systems testing.

This third edition cancels and replaces the second edition ( ISO 3888-2:2011 ), which has been technically revised.

The main changes are as follows:

re-design of figures;
added recommendations on recording environmental conditions;
minor rephrasing changes.

A list of all parts in the ISO 3888 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

Introduction

The main purpose of this document is to provide repeatable and discriminatory test results.

The dynamic behaviour of a road vehicle is a very important aspect of active vehicle safety. Any given vehicle, together with its driver and the prevailing environment, constitutes a closed-loop system that is unique. The task of evaluating the dynamic behaviour is therefore very difficult since the significant interaction of these driver-vehicle-environment elements are each complex in themselves. A complete and accurate description of the behaviour of the road vehicle necessarily involves information obtained from a number of different tests.

Since this test method quantifies only one small part of the complete vehicle handling characteristics, the results of these tests can only be considered significant for a correspondingly small part of the overall dynamic behaviour.

Moreover, insufficient knowledge is available concerning the relationship between overall vehicle dynamic properties and accident avoidance. A substantial amount of work is necessary to acquire sufficient and reliable data on the correlation between accident avoidance and vehicle dynamic properties in general and the results of these tests in particular. Consequently, any application of this test method for regulation purposes requires proven correlation between test results and accident statistics.

1 Scope

This document defines the dimensions of the test track for a closed-loop, severe lane-change manoeuvre test for subjectively determining the obstacle avoidance performance of a vehicle, one specific part of vehicle dynamics and road-holding ability. It is applicable to passenger cars as defined in ISO 3833 and light commercial vehicles up to a gross vehicle mass of 3,5 t. An example of the test method is provided in Annex A.

2 Normative references

3 Terms and definitions

4 Specifications

4.1 Dimensions of the obstacle avoidance track

4.2 Marking of the obstacle avoidance track

Bibliography