ISO/TR 24315-2
(Main)Intelligent transport systems — Management of electronic traffic regulations (METR) — Part 2: Operational concepts (ConOps)
Intelligent transport systems — Management of electronic traffic regulations (METR) — Part 2: Operational concepts (ConOps)
Systèmes de transport intelligents — Gestion des règles de circulation sous forme électronique — Partie 2: Concepts opérationnels
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FINAL DRAFT
Technical
Report
ISO/DTR 24315-2
ISO/TC 204
Intelligent transport systems —
Secretariat: ANSI
Management of electronic traffic
Voting begins on:
regulations (METR) —
2025-06-06
Part 2:
Voting terminates on:
2025-08-29
Operational concepts (ConOps)
Systèmes de transport intelligents — Gestion des règles de
circulation sous forme électronique —
Partie 2: Concepts opérationnels
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
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INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/DTR 24315-2:2025(en) © ISO 2025
FINAL DRAFT
ISO/DTR 24315-2:2025(en)
Technical
Report
ISO/DTR 24315-2
ISO/TC 204
Intelligent transport systems —
Secretariat: ANSI
Management of electronic traffic
Voting begins on:
regulations (METR) —
Part 2:
Voting terminates on:
Operational concepts (ConOps)
Systèmes de transport intelligents — Gestion des règles de
circulation sous forme électronique —
Partie 2: Concepts opérationnels
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/DTR 24315-2:2025(en) © ISO 2025
ii
ISO/DTR 24315-2:2025(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms. 1
5 Current system or situation . 2
5.1 General .2
5.2 Background, objectives and scope .3
5.2.1 Background .3
5.2.2 Objectives .3
5.2.3 Scope of application .4
5.3 Operational policies and constraints .4
5.3.1 Policies .4
5.3.2 Constraints .5
5.4 Description of the current situation .5
5.4.1 General .5
5.4.2 Terminators .6
5.4.3 Processes .9
5.4.4 Data flows .10
5.4.5 Additional stakeholders .10
5.4.6 Data details . 12
5.5 Modes of operation for the current situation . 15
5.6 User classes and other involved personnel .16
5.6.1 General .16
5.6.2 Users subject to rules .16
5.6.3 Entities that establish rules.17
5.6.4 Third party entities .18
5.7 Support environment . . .18
5.7.1 General .18
5.7.2 Sources of support .19
6 Justification for and nature of changes . .20
6.1 General . 20
6.2 Justification of changes . 20
6.2.1 General . 20
6.2.2 Evolving transport environment . 20
6.2.3 Discrepancy reports .21
6.3 User need statements . 23
6.3.1 Trustworthiness needs. 23
6.3.2 User needs . 35
6.3.3 Rule maker needs . 44
6.3.4 Third party needs: auditing . 48
6.4 Priorities . 48
6.5 Deferred user needs . . 48
6.5.1 General . 48
6.5.2 User needs deferred to a future release . 49
6.5.3 User needs considered but not included . 49
6.6 Assumptions and constraints . 49
6.6.1 Assumptions . 49
6.6.2 Constraints .51
7 Concepts for the proposed system .52
7.1 General .52
iii
ISO/DTR 24315-2:2025(en)
7.2 Background, objectives, and scope .52
7.3 Operational policies and constraints .52
7.3.1 Policies .52
7.3.2 Constraints .52
7.4 Description of the proposed system .52
7.4.1 Overview .52
7.4.2 Terminators . 54
7.4.3 Processes .
...
ISO/DTR 24315-2:####(DTR)
ISO/TC 204/WG 19
Secretariat: ANSI
Date: 2025-03-0605-23
Intelligent transport systems — Management of electronic traffic
regulations (METR) — —
Part 2:
Operational Conceptconcepts (ConOps)
DTR stage
Warning for WDs and CDs
This document is not an ISO International Standard. It is distributed for review and comment. It is subject to change
without notice and may not be referred to as an International Standard.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.
Systèmes de transport intelligents — Gestion des règles de circulation sous forme électronique —
Partie 2: Concepts opérationnels
© ISO #### – All rights reserved
ISO/DTR 24315-2:####(DTR) 2025-03-06:(en)
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland
© ISO #### 2025 – All rights reserved
ii
2025-03-06 ISO/DTR 24315-2:####(DTR:(en)
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 1
5 Current system or situation . 4
5.1 General . 4
5.2 Background, objectives and scope . 4
5.3 Operational policies and constraints . 6
5.4 Description of the current situation . 7
5.5 Modes of operation for the current situation . 18
5.6 User classes and other involved personnel . 19
5.7 Support environment . 22
6 Justification for and nature of changes . 24
6.1 General . 24
6.2 Justification of changes . 24
6.3 User need statements . 27
6.4 Priorities . 54
6.5 Deferred user needs. 54
6.6 Assumptions and constraints . 55
7 Concepts for the proposed system . 57
7.1 General . 57
7.2 Background, objectives, and scope . 58
7.3 Operational policies and constraints . 58
7.4 Description of the proposed system . 58
7.5 Modes of operation . 64
7.6 User classes and other involved personnel . 65
7.7 Support environment . 65
8 Summary of impacts . 66
8.1 Operational impacts . 66
8.2 Organizational impacts . 67
8.3 Impacts during development . 67
9 Analysis of the proposed system . 67
9.1 Benefits . 67
9.2 Disadvantages and limitations . 67
9.3 Alternatives considered . 68
Annex A (informative) Operational scenarios . 69
Annex B (informative) Data flow diagram conventions . 85
Annex C (informative) Tentative categories for METR information . 86
Bibliography . 89
© ISO ####2025 – All rights reserved
iii
ISO/DTR 24315-2:####(DTR) 2025-03-06:(en)
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 drawnISO draws attention to the possibility that some of the elementsimplementation of this
document may beinvolve the subjectuse of (a) patent(s). ISO takes no position concerning the evidence,
validity or applicability of any claimed patent rights in respect thereof. As of the date of publication of this
document, ISO had not received notice of (a) patent(s) which may be required to implement this document.
However, implementers are cautioned that this may not represent the latest information, which may be
obtained from the patent database available at www.iso.org/patents. 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 ).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO'sISO’s adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
This is, in collaboration with the first edition ofEuropean Committee for Standardization (CEN) Technical
Committee CEN/TC 278, Intelligent transport systems, in accordance with the Agreement on technical
cooperation between ISO 24315-2.and CEN (Vienna Agreement).
A list of all parts in the ISO 24315 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.
© ISO #### 2025 – All rights reserved
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2025-03-06 ISO/DTR 24315-2:####(DTR:(en)
Introduction
0.1 System overview
0.1.1 General
The ISO 24315 series is intended to provide users access to geo-specific, trustworthy, timely, authoritative,
machine-interpretable, traffic and transport related rules enacted by jurisdictional entities, including those
who define rules for campuses (i.e.,. private grounds). This is conceptually shown in Figure 1Figure 0-1. .
Figure 0-1: — METR concept
0.1.10.1.2 Purpose
Management of Electronic Traffic Regulationselectronic traffic regulations (METR) is designed to assist
developers and manufacturers of driving automation systems (i.e.,. automation Levelslevels 1-5) and driver
information systems (including those at automation Levellevel 0) to electronically obtain traffic rules to better
enable:
a) interacting safely with other road users;
b) following instructions from law enforcement organizations, and those authorized to direct traffic;
c) maintaining smooth and safe flow of traffic; and
d) complying with other rules enacted to support legislative policies (such as environmental protection,
noise, manage height and weight restrictions, and societal aspects such as market days, fiestas, pedestrian
[8 ]
zones) , etc.). [1] .
METR is designed to provide a reference framework for the trustworthy distribution of electronic versions of
legal traffic rules, however content and application of the traffic rules is outside of the scope of the METR
standards and specifications.
0.1.20.1.3 Flow of information
The general flow of METR information is illustrated in Figure 2Figure 0-2 and subsequently described.
© ISO ####2025 – All rights reserved
v
ISO/DTR 24315-2:####(DTR) 2025-03-06:(en)
Key
a
METR starts with rule makers defining and enacting rules that are relevant to transport users.
b
Each legal rule is translated into a METR rule, which is a secure, standardized electronic representation that includes a digital
signature of the rule signing organization.
c
METR rules are collected for a geographic area(s) and specific scope(s).
d
Rules are distributed to METR users based on their needs.
e
METR users become aware of the METR rules, verify their authenticity, and respond appropriately.
f
As needed, METR users can submit discrepancy reports to a discrepancy handler for investigation and correction.
Figure 0-2: — METR flow of information
Key
.
METR starts with rule makers defining and enacting rules that are relevant to transport users;
© ISO #### 2025 – All rights reserved
vi
2025-03-06 ISO/DTR 24315-2:####(DTR:(en)
.
each legal rule is translated into a METR rule, which is a secure, standardized electronic representation
that includes a digital signature of the rule signing organization;
.
METR rules are collected for a geographic area(s) and specific scope(s);
.
rules are distributed to METR users based on their needs;
.
METR users become aware of the METR rules, verify their authenticity, and respond appropriately;
and
.
as needed, METR users can submit discrepancy reports to a discrepancy handler for investigation and
correction.
0.1.100.1.4 Graphical overview
Figure 3Figure 0-3 provides an overview of the data and devices included within the scope of the METR
environment.
Figure 0-3: METR streetscape
Key
A Freight rules
B Kerbside usage rules
C Ride sharing rules
D Micromobility rules
E VRU rules
F Public transport rules
G Rules for automated driving systems
H
...
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