BS ISO 19638:2018 pdf download

BS ISO 19638:2018 pdf download.Intelligent transport systems — Road boundary departure prevention systems (RBDPS) — Performance requirements and test procedures
1 Scope
This document contains the basic control strategy, minimum functionality requirements, basic driver interface elements, minimum requirements for diagnostics and reaction to failure, and performance test procedures for road boundary departure prevention systems (RBDPS). RBDPS is a driving safety support system which acts on vehicles to prevent road departures. RBDPS is designed to reduce damage and accidents arising from road boundary departures. This document is intended to be applied to systems that predict road boundary departures and maintain the vehicle within the road boundaries by both lateral acceleration control and longitudinal deceleration control. RBDPS is intended to operate on roads (well-developed and standardized freeways or highways) having solid lane markers. Roadwork zones or roads without visible road boundary markers are not within the scope of this document. RBDPS is intended for light duty passenger vehicles and heavy vehicles. RBDPS is not designed to operate continuously, but to operate automatically only when possible road boundary departures are detected or predicted. However, the driver’s decision and operation takes priority at all times.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1176, Road vehicles — Masses — Vocabulary and codes
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1 control threshold
control trigger point set in the system where RBDPS control is issued
Note 1 to entry: In the case of TTLC (3.20) the control threshold shifts depending on the rate of departure.
Note 2 to entry: The control threshold is placed within the control threshold placement zone (see Figure 3).
3.2 control threshold placement zone
zone between the control threshold line and the latest control lines within which the control threshold is placed
Note 1 to entry: There is one control threshold placement zone at the inner side of the lane marking and one at the outer side of the lane marking (see Figure 3).
3.3 failure
inability of a system or system component to perform a required function within specified limits, which is caused by mechanical or electronic malfunction
Note 1 to entry: Temporary performance reductions, for example, due to bad weather conditions, bad lane markings, or temporary sensor blindness, are not considered a failure.