ISO/TS 15007-2:2001

TECHNICAL ISO/TS
SPECIFICATION 15007-2
First edition
2001-12-15

Road vehicles — Measurement of driver
visual behaviour with respect to transport
information and control systems —
Part 2:
Equipment and procedures
Véhicules routiers — Mesurage du comportement visuel du conducteur en
relation avec les systèmes de contrôle et d'information sur le transport —
Partie 2: Équipement et procédures




Reference number
ISO/TS 15007-2:2001(E)
©
ISO 2001

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ISO/TS 15007-2:2001(E)
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ISO/TS 15007-2:2001(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
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Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted
by the technical committees are circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting a vote.
In other circumstances, particularly when there is an urgent market requirement for such documents, a technical
committee may decide to publish other types of normative document:
— an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in an
ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the parent
committee casting a vote;
— an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical
committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a vote.
An ISO/PAS or ISO/TS is reviewed after three years with a view to deciding whether it should be confirmed for a
further three years, revised to become an International Standard, or withdrawn. In the case of a confirmed ISO/PAS
or ISO/TS, it is reviewed again after six years at which time it has to be either transposed into an International
Standard or withdrawn.
Attention is drawn to the possibility that some of the elements of this part of ISO/TS 15007 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/TS 15007-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 13,
Ergonomics applicable to road vehicles.
ISO/TS 15007 consists of the following parts, under the general title Road vehicles — Measurement of driver visual
behaviour with respect to transport information and control systems:
Part 1: Definitions and parameters
Part 2: Equipment and procedures

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ISO/TS 15007-2:2001(E)
Introduction
This Technical Specification supports ISO 15007-1, which defines key terms and parameters for the assessment of
the visual impact on driver visual behaviour of TICS (Traffic Information Control Systems), and other vehicle tasks
or on-board systems.
ISO/TS 15007-2 supports Part 1 by giving guidance on equipment and procedures that can be used in a practical
TICS evaluation, with recommendations on how to interpret selected metrics (standards of measurement) of visual
behaviour.

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TECHNICAL SPECIFICATION ISO/TS 15007-2:2001(E)

Road vehicles — Measurement of driver visual behaviour with
respect to transport information and control systems —
Part 2:
Equipment and procedures
1 Scope
This Technical Specification gives guidelines on equipment and procedures for analyzing driver visual behaviour,
intended to enable assessors of transport information and control systems (TICS) to
 plan evaluation trials,
 specify (and install) data capture equipment, and
 analyse, interpret and report visual-behaviour metrics (standards of measurement).
It is applicable to both road trials and simulated driving environments. It is not applicable to the assessment of
head-up displays.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of
this part of ISO/TS 15007. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this part of ISO/TS 15007 are encouraged to
investigate the possibility of applying the most recent edition of the normative document indicated below. For
undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC
maintain registers of currently valid International Standards.
ISO 15007-1, Road vehicles — Measurement of driver visual behaviour with respect to transport information and
control systems — Part 1: Definitions and parameters
3 Terms and definitions
For the purposes of this part of ISO 15007, the terms and definitions given in ISO 15007-1 apply.
4 Evaluation trial planning
4.1 Subject selection
Evaluation trials of TICS applications should use a representative sample from the target population for the specific
TICS. This driver sample should be able to be categorized by age, sex, visual ability and driving experience.
4.2 Trial procedures
4.2.1 General
Assessment of driver visual demand can be carried out in relation to many forms of TICS applications and road
environments. Therefore, consideration should be given to the following factors influencing driver visual behaviour.
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ISO/TS 15007-2:2001(E)
4.2.2 Roadway/traffic specification
An appropriate operational environment for the specific TICS application under evaluation should be chosen. The
type of roadway and likely traffic conditions to be encountered should be defined within the trial.
4.2.3 Vehicle specification
Experimental apparatus used to represent the driving task should be described as fully as practicable.
EXAMPLE Make and model of road vehicle employed or driving simulator characteristics.
4.2.4 TICS specification
The characteristics of the TICS should be reported.
EXAMPLE Type, position and image quality of a visual display.
4.2.5 Subject training
Trial objectives will determine the need for subject training in the use of the TICS. Assuming that some form of
training is required, subjects should receive clear and consistent guidance. The tasks and subtasks associated with
the TICS should be fully explained to the subject and the limitations of responsibility and pacing of these between
the driver and experimenter should be specified. Each subject’s familiarity with the TICS prior to the trial should be
reported. When determining the usability of the TICS device, consideration should be given to the level and
assessment of training required.
4.2.6 Data exclusion
Control procedures for individual evaluation trials within an experimental programme should include guidelines for
the conditions under which the trial is to be terminated.
EXAMPLE Trial aborted for failure to complete a task or subtask: how this is to be recorded or how the trial is to be re-
scheduled.
4.2.7 Experimental conditions, tasks and subtasks
4.2.7.1 Experimental condition
This is considered to encompass all visual behaviour of the driver during an experimental session.
EXAMPLE The distributions of visual scanning to all specified targets of the visual scene (including the TICS), from the
specified start of a test route to its specified end.
4.2.7.2 Task
This is the driver’s visual behaviour associated with a target.
EXAMPLE All visual behaviour associated with the use of a route guidance system.
4.2.7.3 Subtask
This refers to one specific interaction with a target
EXAMPLE When using a route guidance TICS, determining the next turning manoeuvre required.
4.2.7.4 Relationship
The relationship between an experimental condition, a task and a subtask is graphically represented in Figure 1.
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ISO/TS 15007-2:2001(E)

Key
1 Experimental condition
2 Task
3 Subtask
Figure 1 — Experimental condition, task and subtask — Relationship
5 Recording equipment
5.1 General
The following gives practical advice on the use of data recording equipment to monitor driver visual demand.
5.2 Reference procedure
A reference procedure for the collection of driver visual behaviour is defined using commonly available video
camera and recording/playback equipment. It is acknowledged that more complex equipment can be utilized in
such evaluations, but for the purposes of TICS evaluation, video-based recording equipment is considered a
minimum. These guidelines describe considerations related to the use of video recording techniques and their
subsequent analysis, and are intended to be feasible and effective when applied both within simulated driving
environments and to real-world trials for determining the visual demand of TICS.
5.3 Equipment
Figure 2 shows the components constituting a typical data-capture system for visual allocation data-gathering using
video recording equipment.
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ISO/TS 15007-2:2001(E)

Key
1 Gaze camera 6 Video mixer
2 Vehicle controls 7 VCR
3 Lane position 8 Time generator
4 Fo
...