ISO 17361:2017

Intelligent transport systems — Lane departure warning systems — Performance requirements and test procedures

ISO 17361:2017 specifies the definition of the system, classification, functions, human-machine interface (HMI) and test methods for lane departure warning systems. These are in-vehicle systems that can warn the driver of a lane departure on highways and highway-like roads. The subject system, which may utilize optical, electromagnetic, GPS or other sensor technologies, issues a warning consistent with the visible lane markings. The issuance of warnings at roadway sections having temporary or irregular lane markings (such as roadwork zones) is not within the scope of ISO 17361:2017. ISO 17361:2017 applies to passenger cars, commercial vehicles and buses. The system will not take any automatic action to prevent possible lane departures. Responsibility for the safe operation of the vehicle remains with the driver.

Systèmes intelligents de transport — Systèmes d'avertissement de départ de ruelle — Exigences de performance et méthodes d'essai

General Information

• Status: Published
• Publication Date: 05-Jun-2017
• ICS: 03.220.20 - Road transport
• ICS: 35.240.60 - IT applications in transport
• Technical Committee: ISO/TC 204 - Intelligent transport systems
• Drafting Committee: ISO/TC 204/WG 14 - Vehicle/roadway warning and control systems
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 03-Jan-2023

Relations

• Revises: ISO 17361:2007 - Intelligent transport systems — Lane departure warning systems — Performance requirements and test procedures
• Effective Date: 10-Dec-2016

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 17361
Second edition
2017-06
Intelligent transport systems —
Lane departure warning systems —
Performance requirements and test
procedures
Systèmes intelligents de transport — Systèmes d’avertissement de
départ de ruelle — Exigences de performance et méthodes d’essai
Reference number
ISO 17361:2017(E)
©
ISO 2017

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ISO 17361:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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ISO 17361:2017(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Specifications and requirements. 5
4.1 System functions . 5
4.2 System classification . 6
4.3 Requirements . 6
4.3.1 Basic requirements . 6
4.3.2 Operational requirements . 7
4.3.3 Human interface requirements . 7
4.4 Optional functions . 8
5 Test method . 8
5.1 Test environment conditions . 8
5.2 Test course conditions . 9
5.3 Test vehicle conditions . 9
5.4 Test system installation and configuration . 9
5.5 Test procedure . 9
5.5.1 Parameters recoverable from data record . 9
5.5.2 Procedure . 9
5.6 Criteria for passing the tests .11
5.6.1 Warning generation test .11
5.6.2 Repeatability test .11
5.6.3 False alarm test .11
Bibliography .12
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ISO 17361:2017(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
This second edition cancels and replaces the first edition (ISO 17361:2007), of which it constitutes a
minor revision with the following modifications:
— Clause 2 has been updated;
— Annex A has been deleted;
— reference to Annex A has been changed to ISO 11270 in 3.2;
— inequality signs have been updated to Unicode.
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ISO 17361:2017(E)

Introduction
Lane departure warning systems (LDWSs) are based on fundamental traffic rules. The main focus of an
LDWS is to help the driver keep the vehicle in the lane on highways and highway-like roads. Accordingly,
a warning is issued to alert the driver in case of lane departure caused by, for example, inattention.
LDWSs are not intended to issue warnings with respect to collisions with other vehicles or to control
vehicle motions.
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INTERNATIONAL STANDARD ISO 17361:2017(E)
Intelligent transport systems — Lane departure warning
systems — Performance requirements and test procedures
1 Scope
This document specifies the definition of the system, classification, functions, human-machine
interface (HMI) and test methods for lane departure warning systems. These are in-vehicle systems that
can warn the driver of a lane departure on highways and highway-like roads. The subject system, which
may utilize optical, electromagnetic, GPS or other sensor technologies, issues a warning consistent with
the visible lane markings. The issuance of warnings at roadway sections having temporary or irregular
lane markings (such as roadwork zones) is not within the scope of this document. This document applies to
passenger cars, commercial vehicles and buses. The system will not take any automatic action to prevent
possible lane departures. Responsibility for the safe operation of the vehicle remains with the driver.
2 Normative references
There are no normative references in this document.
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 http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
lane
area of roadway that a vehicle would be expected to travel along in the absence of any obstruction
without the driver’s desire to change the path of travel
3.2
visible lane marking
delineators intentionally placed on the borderline of the lane (3.1) that are directly visible by the driver
while driving (i.e. not covered by snow, etc.)
Note 1 to entry: ISO 11270:2014, Annex B gives country-specific visible lane-marking definitions.
3.3
incidental visible road feature
visible patterns on the road surface that were not explicitly intended to delineate the boundaries of the
lane (3.1) but which are indicative of the position of the lane
Note 1 to entry: These include such features as pavement seams or edges, kerbs, and tracks or ruts left by
previous vehicles.
3.4
lane boundary
borderline of the lane (3.1), situated at the centre of a visible lane marking (3.2) or, in the absence of a
visible lane marking, determined by incidental visible road features (3.3) or other means such as GPS,
magnetic nails, etc.
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ISO 17361:2017(E)

3.5
default lane width
predetermined width given to a lane (3.1) when a visible lane marking (3.2) exists only on one side of the
lane and no other lane boundaries are detected by the system
3.6
departure
situation in which the outside of one of the front wheels of a vehicle or of the leading part of an
articulated vehicle (or, in the case of a three-wheeled vehicle, the outside of one of the wheels on the
axle with the widest track) is crossing a specified line
3.7
lane departure
point of departure (3.6) across the lane boundary (3.4)
3.8
rate of departure
V
subject vehicle’s approach velocity at a right angle to the lane boundary (3.4) at the warning issue
point (3.10)
3.9
time to line crossing
TTLC
calculated time to lane departure (3.7)
EXAMPLE The simplest method of calculating TTLC is to divide the lateral distance, D, between the
predetermined part of the vehicle and the lane boundary (3.4) by the rate of departure, V, (3.8) of the vehicle
relative to the lane (3.1).
3.10
warning issue point
measured location and time at which a warning starts to be issued
3.11
warning threshold
location where the warning is issued on the road, which corresponds to a warning trigger point set in
the system
Note 1 to entry: In the case of TTLC (3.9), the warning threshold shifts depending on the rate of departure (3.8).
Note 2 to entry: The warning threshold is placed within the warning threshold placement zone (3.12) (see
Figure 1).
3.12
warning threshold placement zone
zone between the earliest and the latest warning lines (3.17) within which the warning threshold (3.11)
is placed
Note 1 to entry: There is one warning threshold placement zone around the left lane boundary (3.4) and one
around the right lane boundary (see Figure 1).
3.13
warning condition
condition in which departure (3.6) across the warning threshold (3.11) occurs
Note 1 to entry: See Figure 2.
3.14
repeatability
ability of a certain percentage of warnings issued by the system to consistently fall within a given range
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ISO 17361:2017(E)

3.15
false alarm
alarm that is issued when the warning conditions (3.13) have not been fulfilled
3.16
earliest warning line
innermost limit of the warning threshold (3.11)
3.17
latest warning line
outermost limit of the warning threshold (3.11)
3.18
no warning zone
zone between the two earliest warning lines (3.16)
3.19
suppression request
driver request or system feature intended to prevent a lane departure warning (3.20) if an intended lane
departure (3.7) is detected
3.20
lane departure warning
warning given to the driver in accordance with the lane departure warning condition in the absence of
suppression requests (3.19)
3.21
system incapable
state of the system in which it is unable to warn the driver of a lane departure (3.7) due to temporary
conditions
...