ISO 11067:2015
(Main)Intelligent transport systems — Curve speed warning systems (CSWS) — Performance requirements and test procedures
Intelligent transport systems — Curve speed warning systems (CSWS) — Performance requirements and test procedures
ISO 11067:2015 contains the basic warning strategy, minimum functionality requirements, basic driver interface elements, minimum requirements for diagnostics and reaction to failure, and performance test procedures for Curve Speed Warning Systems (CSWS). CSWS warns the driver against the danger caused by maintaining excessive speed to negotiate the upcoming curved roads, so that the driver may reduce the speed. The system does not include the means to control the vehicle to meet the desired speed. The responsibility for safe operation of the vehicle always remains with the driver. It applies to vehicles with four or more wheels.
Systèmes intelligents de transport — Systèmes d'alerte de vitesse excessive en approche de virage (CSWS) — Exigences de performance et modes opératoires d'essai
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 11067
First edition
2015-07-15
Intelligent transport systems —
Curve speed warning systems (CSWS)
— Performance requirements and
test procedures
Systèmes intelligents de transport — Systèmes d’alerte de vitesse
excessive en approche de virage (CSWS) — Exigences de performance
et modes opératoires d’essai
Reference number
©
ISO 2015
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Terms and definitions . 1
3 Symbols . 5
4 Classification . 6
5 Requirements . 6
5.1 Basic operation principle . 6
5.2 Functionality . 7
5.2.1 Basic system operation. 7
5.2.2 Determination of the target curvature point of interest . 7
5.2.3 Basic shape of a curved road . 8
5.2.4 Radius of curvature requirement for available state . 9
5.2.5 Determination of the warning threshold speed .10
5.2.6 Curve speed warning time requirements .10
5.2.7 Look ahead distance requirement .11
5.2.8 Appropriate warning for multiple curve .11
5.2.9 Optional functions of CSWS .12
5.3 Basic driver interface capabilities .13
5.3.1 Operation elements and system reactions .13
5.3.2 Haptic elements .13
5.4 Operational limits .13
6 Performance evaluation test methods .13
6.1 Test environmental conditions .13
6.2 Test course conditions .14
6.3 Test vehicle conditions .15
6.4 Test system installation and configuration .15
6.5 Test procedure .15
6.5.1 Parameters recoverable from data record .15
6.5.2 Detail test procedure .16
Annex A (informative) Definition of curves .19
Annex B (informative) Operation principles .22
Annex C (informative) Calculation of the minimum AOC .26
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 meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information.
The committee responsible for this document is ISO/TC 204, Intelligent transport systems.
iv © ISO 2015 – All rights reserved
Introduction
The main function of Curve Speed Warning Systems (CSWS) is to warn the driver against the danger
caused by maintaining excessive speed to negotiate an upcoming curved road. The system computes the
current location of the vehicle with respect to the upcoming curved road of interest and determines a
warning threshold speed, below which the vehicle can safely negotiate the upcoming curves. If the vehicle
speed exceeds the warning threshold speed, the system provides a warning to the driver, prompting the
driver to react and lower the subject vehicle speed to a level suitable for negotiating the curved road
ahead. The CSWS scope does not include automated intervention features or means for controlling the
vehicle to match a desired speed.
INTERNATIONAL STANDARD ISO 11067:2015(E)
Intelligent transport systems — Curve speed warning
systems (CSWS) — Performance requirements and test
procedures
1 Scope
This International Standard contains the basic warning strategy, minimum functionality requirements,
basic driver interface elements, minimum requirements for diagnostics and reaction to failure, and
performance test procedures for Curve Speed Warning Systems (CSWS). CSWS warns the driver against
the danger caused by maintaining excessive speed to negotiate the upcoming curved roads, so that the
driver may reduce the speed. The system does not include the means to control the vehicle to meet the
desired speed. The responsibility for safe operation of the vehicle always remains with the driver.
This International Standard applies to vehicles with four or more wheels.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
subject vehicle
vehicle equipped with the CSWS and related to the topic of discussion
2.2
subject vehicle speed
longitudinal component of the subject vehicle velocity
2.3
system states
one of several stages or phases of system operation
Note 1 to entry: See Figure 1.
2.3.1
CSWS off state
state in which CSWS is off
Note 1 to entry: This state has one of the following three causes: the driver has selected the off condition, the
ignition is off, or the CSWS is in failure.
2.3.2
CSWS on state
state in which CSWS is on
Note 1 to entry: This state is either in unavailable state or in available state.
2.3.3
CSWS unavailable state
system is in on state and the system has inadequate information
Note 1 to entry: The system cannot make a decision whether the warning criteria are met or not because of fault
in GNSS device, lack of map data, or other reasons.
2.3.4
CSWS available state
system is in on state and the system has sufficient information to make decisions on whether the
warning criteria are fulfilled or not
2.3.5
CSWS warning state
system is in available state and the warning criteria are all met
Note 1 to entry: The CSWS starts warning(s) or is operating the warning(s). The system periodically judges
whether the criteria are met in order to transition to the non-warning state.
2.3.6
CSWS non-warning state
system is in available state and the warning criteria are not all met
Note 1 to entry: The system periodically judges whether the criteria are met in order to transition to the warning state.
2.4
curved road
section where the radius of curvature is less than or equal to R
C
Note 1 to entry: R denotes the maximum radius of curvature to be regarded as a curvature point of interest for
C
potential warning for CSWS (see 5.2.2).
2.5
curvature point
arbitrary points on the curved road that has associated location and value of curvature
2.6
curvature point of interest
point of the curved road ahead where the distances from the subject vehicle to the curved roads are less
than the look ahead distance, S
LAD
2.7
curve start point
location where the radius of curvature of the curved roadway ahead becomes less than R
C
Note 1 to entry: See 5.2.3.
2.8
curve end point
location where the radius of curvature of the curved roadway ahead becomes ≥R
C
Note 1 to entry: See 5.2.3.
2.9
target curvature point of interest
particular curvature point of interest on the roadway of the subject vehicle that CSWS is about to provide
the warning to the driver
Note 1 to entry: CSWS selects the target curvature point of interest among the curvature points of interest and the
curvature point of interest may vary depending upon the distance from the current location of the subject vehicle
to the curvature point of interest and the current speed of the subject vehicle. If a section of the curved road has a
constant radius of the curvature, the curve start point becomes the target point of interest. See 5.2.2.
2.10
distance to curvature point of interest
S
current
distance from the current position of the subject vehicle to the curvature point of interest
2 © ISO 2015 – All rights reserved
2.11
time to curvature point of interest
t
TC
travel time from the current position of the subject vehicle to the curvature point of interest and
defined as follows
tS= V
TC current current
where
V is the current speed of the subject vehicle
current
2.12
warning threshold speed
V
WT
vehicle speed threshold that is used to determine if the CSWS warning is required
Note 1 to entry: If the vehicle speed measurement is greater than this threshold value, the CSWS provides the
warning
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.