ISO/TS 5255-1:2022

Intelligent transport systems - Low-speed automated driving system (LSADS) service - Part 1: Role and functional model

This document defines the requirements of the basic role and functional model of service applications for the introduction of low-speed automated driving system (LSADS) services including infrastructure facilities for supporting mobility in urban and rural areas. This document covers services using LSADS-equipped vehicles only; in-vehicle control systems are outside the scope. Examples of infrastructure facilities and road furniture include driving monitoring platforms, emergency response platforms, operation management platforms, user service platforms (e.g. for online reservations and online payments) and platforms for supporting automated driving systems.

Systèmes intelligents de transport — Service de système de conduite automatisée à vitesse réduite (CAVR) — Partie 1: Rôle général et modèle fonctionnel

General Information

• Status: Published
• Publication Date: 01-Mar-2022
• 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 19 - Mobility integration
• Current Stage: 9060 - Close of review
• Completion Date: 02-Sep-2028

Overview

ISO/TS 5255-1:2022 - "Intelligent transport systems - Low-speed automated driving system (LSADS) service - Part 1: Role and functional model" defines a common service-level role and functional model for deploying low‑speed automated driving system (LSADS) services in urban and rural areas. The technical specification focuses on service applications and supporting infrastructure (e.g., operation management platforms, emergency response and driving monitoring platforms, user booking/payment platforms) and intentionally excludes in‑vehicle control systems. It is intended as a baseline reference to support emerging LSADS business models and infrastructure design.

Key topics and technical requirements

• Role and functional model definition: baseline models for application, operational and physical layers that describe roles, responsibilities and interactions among system actors.
• Service classification and evolution: a suggested AD service classification and discussion of service evolution, noting many current LSADS deployments align with SAE ODD levels L3 and L4.
• Infrastructure support (ISAD): definitions and examples of infrastructure facilities and road furniture that support LSADS services, including different infrastructure support levels (see informative annex).
• Operational physical layer: actors and data-flow models covering LSADS control centres, service vehicles, transport providers, vehicle owners, inspection/certification authorities, traffic management centres, SCMS (security credential management system), first responders and ISAD.
• Booking & payment layer: functional roles and data flows for user booking, online reservations, payments, central account systems, banking and payment media owners.
• Concept of operations (CONOPS): goals, operational processes, policies, certification authority appointment and practical operational constraints.
• Normative references: links to related ISO work such as ISO/TR 4445 (role model of ITS in smart cities) and ISO/TS 14812 (vocabulary).

Practical applications

ISO/TS 5255-1 is practical for planning, specifying and integrating LSADS services where vehicles operate at low speeds for passenger or goods movement. Typical applications:

• Design of urban/rural LSADS pilot projects and service rollouts
• Specification of infrastructure requirements for automated shuttles and microtransit
• Architecture for service platforms (booking, operations, emergency response)
• Defining data‑flows, certification processes and actor roles for safe operations

Who should use this standard

• Municipal and regional transport authorities and regulators
• ITS architects and system integrators
• LSADS service providers and transport operators
• Infrastructure planners and road authorities (ISAD design)
• Payment platform and mobility service vendors
• Certification bodies and first‑responder planners

Related standards

• ISO/TR 4445 - ITS mobility integration role model for smart cities
• ISO/TS 14812 - ITS vocabulary

ISO/TS 5255-1:2022 is a service‑level blueprint helping stakeholders define interoperable, secure and certifiable LSADS services and supporting infrastructure for safe, scalable low‑speed automated mobility.

Standards Content (Sample)

TECHNICAL ISO/TS
SPECIFICATION 5255-1
First edition
2022-03
Intelligent transport systems — Low-
speed automated driving system
(LSADS) service —
Part 1:
Role and functional model
Systèmes intelligents de transport — Service de système de conduite
automatisée à vitesse réduite (CAVR) —
Partie 1: Rôle général et modèle fonctionnel
Reference number
© ISO 2022
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
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or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 1
5 Automated driving system classification and service evolution . 2
5.1 Introduction . 2
5.2 Service classification of AD systems . 2
5.3 AD system service evolution . . 2
6 Infrastructure support for LSADS service role and functional model .3
7 Role and functional model .4
7.1 Objective. 4
7.2 National variations . 4
7.3 Basic role model. 4
7.4 Application layer role and functional model for LSADS . 5
7.4.1 Role and functional model options . 6
7.4.2 Certification of service providers . 6
8 Concept of operations . 6
8.1 General . 6
8.2 Statement of the goals and objectives of the system . 6
8.3 Strategies, tactics, policies and constraints affecting the system . 6
8.4 Operational processes for the system . 7
8.5 Appointment of a certification authority . 7
8.6 Role of the service provider . 7
8.7 User . 7
9 Operational physical layer role and functional model . 8
9.1 General . 8
9.2 Actors . 8
9.3 LSADS service role and functional model . 9
9.3.1 General . 9
9.3.2 LSADS service control centre . 9
9.3.3 LSADS service user with nomadic device . 9
9.3.4 LSADS transport provider . 9
9.3.5 LSADS service vehicle . 9
9.3.6 LSADS service driving recorder . 9
9.3.7 LSADS service vehicle owner . 10
9.3.8 LSAD vehicle inspection/certification authority. 10
9.3.9 First responders (police/fire fighters) . 10
9.3.10 LSADS service supporting infrastructure facilities (ISAD) (physical and
digital) . 10
9.3.11 Regulator (municipal) . 10
9.3.12 Regional road authority . 10
9.3.13 SCMS (security credential management system) . 10
9.3.14 Traffic management centre . 10
9.4 Operational physical layer data flow . 11
9.4.1 General . 11
9.4.2 External data sharing . 11
9.4.3 LSADS service supporting infrastructure facilities. 11
9.4.4 Interaction between LSADS components . 11
iii
10 Booking and payment layer role and functional model .12
10.1 General .12
10.2 Actors .12
10.3 LSADS service role and functional model in booking and payment layer .12
10.3.1 General .12
10.3.2 User with nomadic device . 13
10.3.3 LSADS service provider .13
10.3.4 Strategic route planning . 13
10.3.5 Banking .13
10.3.6 Central account payment system . 13
10.3.7 Payment media owner . 13
10.4 Booking and payment layer data flow . 13
10.4.1 General .13
10.4.2 Data flow of booking and payment actions . 14
Annex A (informative) Infrastructure support levels for automated driving (ISAD) .15
Bibliography .16
iv
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
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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 systems.
A list of all parts in the ISO 5255 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.
v
Introduction
In order to introduce low-speed automated driving systems (LSADS) to support mobility used as a
means of moving people, goods and services in urban and rural areas, it is necessary to standardize the
related service role and functional model.
ISO 22737 describes vehicle driving supports, but does not cover the requirements of the service role
or the functional model covering infrastructure facilities. Therefore, a document covering these topics
is necessary.
Business use cases regarding LSADS services are currently emerging and further variations are coming
to be deployed. Various roles and functional model presentation methodologies are available for use,
and there is a need for a set of more commonly understandable role and functional model presentation
guidelines. This document defines a common LSADS service role and functional model presentation.
Future emerging business cases can refer to this document as a baseline document. Indeed, this it is
intended to assist in the development of future business, and does not hinder them. This document can
also contribute to the development of future automated driving system service business cases other
than LSADS services.
vi
TECHNICAL SPECIFICATION ISO/TS 5255-1:2022(E)
Intelligent transport systems — Low-speed automated
driving system (LSADS) service —
Part 1:
Role and functional model
1 Scope
This document defines the requirements of the basic role and functional model of service applications
for the introduction of low-speed automated driving system (LSADS) services including infrastructure
facilities for supporting mobility in urban and rural areas.
This document covers services using LSADS-equipped vehicles only; in-vehicle control systems are
outside the scope.
Examples of infrastructure facilities and road furniture include driving monitoring platforms,
emergency response platforms, operation management platforms, user service platforms (e.g. for
online reservations and online payments) and platforms for supporting automated driving systems.
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/TR 4445, Intelligent transport systems — Mobility integration — Role model of ITS service application
in smart cities
ISO/TS 14812, Intelligent transport systems — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/TS 14812 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Abbreviated terms
AD automated driving
CAD connected and automated driving
CONOPS concept of operations
E-call emergency call
ISAD infrastructure support levels for automated driving
LSAD low-speed automated driving
LSADS low-speed automated driving system
METR management for electronic traffic regulations
ODD operational design domain
PT public transport
SCMS security credential management system
5 Automated driving system classification and service evolution
5.1 Introduction
The automated driving (AD) system classification and service evolution vision are described in this
clause in order to present the current development and deployment situation of LSADS services.
5.2 Service classification of AD systems
A suggested AD system service classification is shown in Table 1.
Within the context of the scope of this document, L2 operational design domain (ODD) is not classified
as AD.
AD system services cover a range of use cases as described in Table 1, including carrying people and
goods, urban and rural use, normal mobility uses and emergency mobility use such as in pandemic/
lockdown situations, where human driving vehicles can be unusable for transporting people and goods.
The majority of current LSADSs deployed are as per the SAE-defined ODD levels L3 and L4. However,
LSADSs of L5 and above are anticipated as being the ideal mobility for flexible use cases in the future.
Table 1 — AD system service classification
ODD levels Mobility for Mobility for goods Urban use Rural area Used under emergen-
people (including road (Last/first mile use (replac- cy or pandemic status
(OEM defini-
service vehicles) use) ing PT)
tion)
L5 A A A A A
L4 A A A A A
L3 O/S O/S O/S O/S O/S
L2 O/S O/S O/S O/S O/S
Key
A: applicable to this document;
0/S: out of scope of this document.
5.3 AD system service evolution
Table 2 shows the expected AD system service evolution. The deployment of the current low-speed
automated driving (LSAD) service is for limited use only, as the safety function and emergency case
manoeuvring ability are not qualified as being a sufficiently safely reliable services. However, the
LSADS is intended to evolve into a fully functional connected and automated driving (CAD) system
in the future. For this reason, it is necessary to develop a LSADS service role and a functional model
defining and covering fully automated and connected driving such as is described by the term CAD.
Tables 2 and 3 show where a current LSADS service sits within the fully automated CAD paradigm.
Table 2 — AD system service evolution (current)
Service type Public Shared and personal Demand manage- Integration with All levels of
transport use ment kerbside opera- ODDs
use (Robot taxi) tion
(PT)
Mobility for C/L C/L C/L
people
Mobility for C/L C/L C/L
goods
Dedicated lane C/L C/L C/L
(road)
Mixed lane
Road ser-
vice vehicles
(snowplough)
Key
C/L: current LSAD emerging status.
Table 3 — AD system service anticipated evolution (future)
Service type Public Shared and personal Demand manage- Integration with All levels of
transport use ment kerbside opera- ODDs
use tion
(Robot taxi)
(PT)
Mobility for F/L F/L F/L F/L F/L
people
Mobility for F/L F/L F/L F/L F/L
goods
Dedicated lane F/L F/L F/L F/L F/L
(road)
Mixed lane
Road ser- F/L F/L F/L F/L F/L
vice vehicles
(snowplough)
Key
F/L: future LSAD emerging status --> reaching to CAD mobility status
6 Infrastructure support for LSADS service role and functional model
The LSADS service shall be fully functional with support from infrastructures, such as safety
information provisioning, kerb operation interactions, road signs and road digital and physical facilities
for CAD.
— Kerb operation, LSADS shall use the kerb for loading and unloading goods and people. The operation
environment should be carefully considered to achieve safe operations.
— Management for electronic traffic regulations (METR), for the efficient and safer operation of
CAD-type LSADS, electronic regulation information shall be given to the vehicle with the safety
information provisioning given from infrastructure facilities.
— V2X communication path between vehicle and infrastructure (LTE, 5G and beyond) should be
carefully designed and the various communication paths between LSADS and infrastructure should
be according to relevant International Standards.
— Infrastructure support levels for automated driving (ISAD) system service categorization per
infrastructure support platform utilization levels shall be according to the Level A (highest level:
cooperative driving) to level E (basic level: conventional infrastructure/no AV support), as developed
by the EU INFRAMIX project.
NOTE A technical report issued by the EU INFRAMIX project proposes the careful study of LSAD operation
according to the ISAD concept, and it is recommended that adoption of this concept be thoroughly discussed in
order to classify the levels for automated driving for supports from infrastructure facilities (see Annex A).
7 Role and functional model
7.1 Objective
This clause describes a generic role and functional model for the provision of ITS service applications
for LSADS services. It explains the general concept of role and functional model operations. It also
provides a definition for the role and functional model and the elaboration of the model at a conceptual
level.
7.2 National variations
The definition of what comprises an ITS service application is an issue for national decision and can
vary from country to country. The instantiation of interoperable on-board platforms (or nomadic
devices such as smart phones) for ITS service application with common features is ideal but varies
between countries, as does the provision of services. It is possible that certain countries will mandate
the use of such a platform, while other
...