ISO 21219-17:2023

INTERNATIONAL ISO
STANDARD 21219-17
First edition
2023-05
Intelligent transport systems — Traffic
and travel information via transport
protocol experts group, generation 2
(TPEG2) —
Part 17:
Speed information (TPEG2-SPI)
Systèmes intelligents de transport — Informations sur le trafic et le
tourisme via le groupe expert du protocole de transport, génération 2
(TPEG2) —
Partie 17: Information de vitesse (TPEG2-SPI)
Reference number
© ISO 2023
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 2
5 Application specific constraints . .3
5.1 Application identification . 3
5.2 Version number signalling . 3
5.3 Ordered components . . 3
5.4 Extensibility . 3
5.5 TPEG service component frame . 4
6 SPI structure . 4
7 SPI message components .4
7.1 SpeedInformationMessage . 4
7.2 SpeedInformation . 5
7.3 MMCSwitch . 5
7.4 MessageManagementContainerLink . 5
7.5 MMCMasterLink . 6
7.6 MMCPartLink . 6
7.7 LocationReferencingLink . 6
8 SPI datatypes .6
8.1 LaneNumber . 6
8.2 SpeedLimitSegment . 7
9 SPI tables .8
9.1 spi001:SpeedInformationType . 8
9.2 spi002:Context . 9
9.3 spi003:VehicleType . . 10
9.4 spi004:InformationUnit . 11
Annex A (normative) TPEG application, TPEG-binary representation .13
Annex B (normative) TPEG application, tpegML representation.18
Annex C (informative) Speed limit road signs (examples) .24
Annex D (informative) Modelling examples .25
Bibliography .35
iii
Foreword
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This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
A list of all parts in the ISO 21219 series can be found on the ISO website.
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iv
Introduction
0.1 History
TPEG technology was originally proposed by the European Broadcasting Union (EBU) Broadcast
Management Committee, who established the B/TPEG project group in the autumn of 1997 with a brief
to develop, as soon as possible, a new protocol for broadcasting traffic and travel-related information in
the multimedia environment. TPEG technology, its applications and service features were designed to
enable travel-related messages to be coded, decoded, filtered and understood by humans (visually and/
or audibly in the user’s language) and by agent systems. Originally, a byte-oriented data stream format,
which can be carried on almost any digital bearer with an appropriate adaptation layer, was developed.
Hierarchically structured TPEG messages from service providers to end-users were designed to
transfer information from the service provider database to an end-user’s equipment.
One year later, in December 1998, the B/TPEG group produced its first EBU specifications. Two
documents were released. Part 2 (TPEG-SSF, which became ISO/TS 18234-2) described the syntax,
semantics and framing structure which was used for all TPEG applications. Meanwhile, Part 4 (TPEG-
RTM, which became ISO/TS 18234-4) described the first application for road traffic messages.
Subsequently, in March 1999, CEN/TC 278, in conjunction with ISO/TC 204, established a group
comprising members of the former EBU B/TPEG and this working group continued development
work. Further parts were developed to make the initial set of four parts, enabling the implementation
of a consistent service. Part 3 (TPEG-SNI, later ISO/TS 18234-3) described the service and network
information application used by all service implementations to ensure appropriate referencing from
one service source to another.
Part 1 (TPEG-INV, later ISO/TS 18234-1) completed the series by describing the other parts and their
relationship; it also contained the application IDs used within the other parts. Additionally, Part 5, the
public transport information application (TPEG-PTI, later ISO/TS 18234-5), was developed. The so-
called TPEG-LOC location referencing method, which enabled both map-based TPEG-decoders and non-
map-based ones to deliver either map-based location referencing or human-readable text information,
was issued as ISO/TS 18234-6 to be used in association with the other applications of parts of the
ISO 18234 series to provide location referencing.
The ISO 18234 series has become known as TPEG Generation 1.
0.2 TPEG Generation 2
When the Traveller Information Services Association (TISA), derived from former forums, was
inaugurated in December 2007, TPEG development was taken over by TISA and continued in the TPEG
applications working group.
It was about this time that the (then) new Unified Modelling Language (UML) was seen as having major
advantages for the development of new TPEG applications in communities who would not necessarily
have the binary physical format skills required to extend the original TPEG TS work. It was also realized
that the XML format for TPEG described within the ISO 24530 series (now superseded) had a greater
significance than previously foreseen, especially in the content-generation segment, and that keeping
two physical formats in synchronism, in different standards series, would be rather difficult.
As a result, TISA set about the development of a new TPEG structure that would be UML-based. This has
subsequently become known as TPEG Generation 2 (TPEG2).
TPEG2 is embodied in the ISO 21219 series and it comprises many parts that cover an introduction,
rules, toolkit and application components. TPEG2 is built around UML modelling and has a core of
rules that contain the modelling strategy covered in ISO 21219-2, ISO 21219-3 and ISO 21219-4 and the
conversion to two current physical formats: binary (see Annex A) and XML (see Annex B); others can
be added in the future. TISA uses an automated tool to convert from the agreed UML model XMI file
directly into an MS Word document file, to minimize drafting errors; this file forms the annex for each
physical format.
v
TPEG2 has a three-container conceptual structure: message management (ISO 21219-6), application
(several parts) and location referencing (ISO/TS 21219-7).
...