ISO 7856

Intelligent transport systems — Remote support for low speed automated driving systems (RS-LSADS) — Performance requirements, system requirements and performance test procedures

This document describes remote support, which is the provision of information or intervention in DDT to LSAD systems operated at Level 4 automation on predefined routes by a remotely located human in order to facilitate trip continuation. • This document is applicable to RS-LSADS in vehicles that provide passenger transport or logistics services on predefined routes. • This document defines the terms and definitions related to RS-LSADS and the system architecture of RS-LSADS. • This document specifies types of RS-LSADS, remote monitoring, remote assistance and remote driving under very limited conditions, and conditions when they can be activated. • This document specifies the performance requirements, system requirements and performance test procedures of RS-LSADS. • This document specifies the data to be communicated between vehicles and RS-LSADS but does not specify protocols and other aspects of communication itself. • This document is applicable to remote support of operational and tactical functions, but does not apply to strategic functions.

Systèmes de transport intelligents — Téléassistance pour les systèmes de conduite automatisée à basse vitesse (RS-LSADS) — Exigences de performance, exigences du système et procédures d'essai de performance

General Information

• Status: Not Published
• 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 - Intelligent transport systems
• Current Stage: 6000 - International Standard under publication
• Start Date: 09-May-2025
• Completion Date: 10-May-2025

Standards Content (Sample)

International
Standard
First edition
Intelligent transport systems —
Remote support for low speed
automated driving systems
(RS-LSADS) — Performance
requirements, system requirements
and performance test procedures
Systèmes de transport intelligents — Téléassistance pour les
systèmes de conduite automatisée à basse vitesse (RS-LSADS) —
Exigences de performance, exigences du système et procédures
d'essai de performance
PROOF/ÉPREUVE
Reference number
© ISO 2025
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms. 3
4.1 Symbols .3
4.2 Abbreviated terms .3
5 RS-LSADS architecture . 4
6 Functions of RS-LSADS . 6
6.1 General .6
6.2 Remote monitoring .6
6.3 Remote assistance .6
6.4 Remote driving .6
7 RS-LSADS functional scenarios . 7
7.1 Remote support scenarios .7
7.1.1 Scenario 1: Re-starting after stopping at the bus bay.7
7.1.2 Scenario 2: Entering the unsignalized intersection . .8
7.1.3 Scenario 3: Entering the signalized intersection (signal information only) .9
7.1.4 Scenario 4: Entering the signalized intersection (signal information and both
lateral directions check) .9
7.1.5 Scenario 5: Bypassing obstacles that block the vehicle path .10
7.1.6 Scenario 6: Out of ODD due to environmental conditions .11
8 System requirements .12
8.1 General . 12
8.2 RS-LSADS state transition diagram . 12
8.2.1 State functional descriptions .14
8.2.2 State transition descriptions . 15
9 Communication performance for remote support .16
9.1 General .16
9.2 Latency in remote support . .17
9.3 End-to-end information latency .17
9.4 Information update rate .18
9.5 Distance error due to latency .18
9.6 Communication messages for remote support .19
9.6.1 Vehicle data .19
9.6.2 LSADS data . 20
9.6.3 Driving environment data . 20
9.6.4 Driving environment audio and video information . 20
9.6.5 Passenger status onboard audio and video information . 20
9.6.6 Remote assistance data . 20
9.6.7 Remote driving control data . 20
9.6.8 Infrastructure sensors data . 20
9.6.9 Infrastructure audio and video information . 20
10 RS-LSADS performance requirements .21
10.1 Remote monitoring performance .21
10.1.1 End-to-end communication requirement during remote assistance standby or
remote driving standby .21
10.2 Remote assistance performance .21
10.2.1 Monitoring data for remote assistant .21
10.2.2 Roles of remote assistant .21
PROOF/ÉPREUVE
iii
10.2.3 Remote assistant response to RFI . 22
10.2.4 Remote assistance HMI, and video field of view and audio . 23
10.2.5 End-to-end communication requirements during remote assistance . 23
10.2.6 Data storage requirements for remote assistance . 23
10.3 Remote driving performance .24
10.3.1 Monitoring data for remote driver .24
10.3.2 Remote driving response to RFD.24
10.3.3 Remote driving HMI, video field of view and audio .24
10.3.4 End-to-end communication requirements during remote driving . 25
10.3.5 Limitations of remote driving . 25
10.3.6 Alert and warning in remote driving . 25
10.3.7 Data storage requirements for remote driving . 25
11 Scenario evaluation test procedures .25
11.1 General . 25
11.2 Test conditions . 26
11.2.1 Subject vehicle conditions . 26
11.2.2 Target vehicle or objects conditions . 26
11.2.3 Environmental conditions . 26
11.2.4 End-to-end communication setup for scenario tests . 26
11.3 Test procedures .27
11.3.1 General .27
11.3.2 Tests for remote assistance .27
11.3.3 Tests for Remote driving .
...

ISO /DIS/PRF 7856:2024(en)
ISO/TC 204
Secretariat: ANSI
ISO TC 204/WG 14
Date: 2024-12-252025-04-11
Intelligent transport systems — Remote support for low speed
automated driving systems (RS-LSADS) — Performance
requirements, system requirements and performance test
procedures
Systèmes de transport intelligents — Téléassistance pour les systèmes de conduite automatisée à basse vitesse
(RS-LSADS) — Exigences de performance, exigences du système et procédures d'essai de performance
PROOF
MUST BE USED
FOR FINAL
ISO CD/PRF 7856: 20XX(E2025(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. Dede Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
© ISO PWI 7856 2025 – All rights reserved
ii
ISO/DISPRF 7856:20242025(en)
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 3
4.1 Symbols . 3
4.2 Abbreviated terms . 3
5 RS-LSADS architecture . 4
6 Functions of RS-LSADS . 8
6.1 General. 8
6.2 Remote monitoring . 8
6.3 Remote assistance . 8
6.4 Remote driving . 8
7 RS-LSADS functional scenarios . 9
7.1 Remote support scenarios . 9
8 System requirements . 15
8.1 General. 15
8.2 RS-LSADS state transition diagram . 16
9 Communication performance for remote support . 20
9.1 General. 20
9.2 Latency in remote support . 21
9.3 End-to-end information latency . 22
9.4 Information update rate . 22
9.5 Distance error due to latency . 22
9.6 Communication messages for remote support . 23
10 RS-LSADS performance requirements . 26
10.1 Remote monitoring performance . 26
10.2 Remote assistance performance . 26
10.3 Remote driving performance . 29
11 Scenario evaluation test procedures . 31
11.1 General. 31
11.2 Test conditions . 31
11.3 Test procedures . 32
Annex A (informative) An Example of RS-LSADS Implementation . 58
Annex B (informative) An example of the interaction between the control centre and the vehicle
for LSADS equipped vehicle mobility service . 59
Annex C (informative) Examples of remote support required scenarios and specific operations
by RS-LSADS . 61
Bibliography . 71
MUST BE USED
FOR FINAL
iii
ISO CD/PRF 7856: 20XX(E2025(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
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International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those Intendedintended 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 documentsdocument 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
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Any trade name used in this document is information given for the convenience of users and does not
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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'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 Systemstransport
systems.
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 PWI 7856 2025 – All rights reserved
iv
ISO/DISPRF 7856:20242025(en)
Introduction
For the sustainable operation of mobility services using automated driving systems (ADS), it can be necessary
to provide additional support for the functioning of the ADS in order to enable mobility services to continue
beyond the constraints of the operational design domain (ODD). Such additional support can include human
remote support, i.e. actions by humans outside the vehicle. The low speed of low speed automated driving
systems (LSADS) equipped vehicles simplifies the provision of remote support.
In this document, remote support is defined as a combination of remote assistance and remote driving.
Currently, individual development and demonstration projects for remote support of LSADS are implemented
in several regions and countries, including UK, US, CA, DE, FR, AU, KR, and JP, amongst others. One example of
such an implementation is given in Annex AAnnex A.
This document indicates the technical requirements of remote support for LSADS (RS-LSADS) and is intended
to provide a common basis for RS-LSADS development.
ISO/SAE PAS 22736 (SAE J3016) defines remote assistance and remote driving. In addition, in ISO 22737
external entity input is described. This document is intended to complement ISO 22737 by defining scenarios
and requirements for remote assistance and remote driving.
MUST BE USED
FOR FINAL
v
DRAFT International Standard ISO/DIS 7856:2024(en)

Intelligent transport systems — Remote support for low speed
automated driving systems (RS-LSADS) — Performance requirements,
system requirements and performance test procedures
1 Scope
This document describes remote support provided to LSADS operated at Level 4 automation on predefined
routes by a remotely located human in order to facilitate safe trip continuation. "Remote support" refers to
the provision of information, or temporary performance of the dynamic driving task (DDT), and remote
monitoring required for these functions.
This document is applicable to RS-LSADS in vehicles that provide passenger transport or logistics services on
predefined routes.
This document specifies:
— — the terms and definitions related to RS-LSADS and the system architecture of RS-LSADS;
— — functions of RS-LSADS, which are: remote monitoring, remote assistance and remote driving that is
operated under very limited conditions, and conditions under which they need to be activated;
— — the performance requirements, system requirements and performance test procedures of RS-LSADS;
— — the data to be communicated between vehicles and the remote support facility (but not protocols or
other aspects of communication system).
This document is applicable to remote support of operational and tactical functions during continuous
operations, but does not apply to strategic functions or to RS-LSADS daily startup or shutdown.
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/SAE PAS 22736, Taxonomy and definitions for terms related to driving automation systems for on-road
motor vehicles
ISO 22737, Intelligent transport systems — Low-speed automated driving (LSAD) systems for predefined routes
— Performance requirements, system requirements and performance test procedures
ISO/SAE 21434, Road vehicles — Cybersecurity engineering
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/SAE PAS 22736 (2021),, ISO 22737
(2021) and the followings apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
ISO CD/PRF 7856: 20XX(E2025(en)
— — ISO Online browsing platform: available at https://www.iso.org/obp
— — IEC Electropedia: available at https://www.electropedia.org/
3.1 3.1
low speed automated driving system (LSADS) equipped vehicle
vehicle which is equipped with a Level 4 automated driving system that has a maximum speed not exceeding
8,89 m/s, and is operated driverless on a pre-defined route
3.2 3.2
remote support
remote
...