EN ISO 14819-1:2013

SLOVENSKI STANDARD
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Intelligent transport systems - Traffic and travel information messages via traffic
message coding - Part 1: Coding protocol for Radio Data System - Traffic Message
Channel (RDS-TMC) using ALERT-C (ISO 14819-1:2013)
Intelligente Transportsysteme - Verkehrs- und Reiseinformationsbotschaften über
Verkehrsbotschaftskodierung - Teil 1: Kodier Protokoll für Radiodatensysteme -
Verkehrsbotschaftskanal (RDS-TMC) unter Nutzung von ALERT-C (ISO 14819-1:2013)
Systèmes intelligents de transport - Informations sur le trafic et le tourisme via le codage
de messages sur le trafic - Partie 1: Protocole de codage pour le système de
radiodiffusion de données (RDS) - Canal de messages d'informations sur le trafic (RDS-
TMC) avec ALERT-C (ISO 14819-1:2013)
Ta slovenski standard je istoveten z: EN ISO 14819-1:2013
ICS:
03.220.20 Cestni transport Road transport
35.240.60 Uporabniške rešitve IT v IT applications in transport
transportu in trgovini and trade
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 14819-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2013
ICS 03.220.20; 35.240.60 Supersedes EN ISO 14819-1:2003
English Version
Intelligent transport systems - Traffic and travel information
messages via traffic message coding - Part 1: Coding protocol
for Radio Data System - Traffic Message Channel (RDS-TMC)
using ALERT-C (ISO 14819-1:2013)
Systèmes intelligents de transport - Informations sur le trafic Intelligente Transportsysteme - Verkehrs- und
et le tourisme via le codage de messages sur le trafic - Reiseinformationen über Verkehrsmeldungskodierung - Teil
Partie 1: Protocole de codage pour le système de 1: Kodierungsprotokoll für den digitalen Radiokanal für
radiodiffusion de données (RDS) - Canal de messages Verkehrsmeldungen (RDS-TMC) unter Nutzung von
d'informations sur le trafic (RDS-TMC) avec ALERT-C(ISO ALERT-C (ISO 14819-1:2013)
14819-1:2013)
This European Standard was approved by CEN on 26 October 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14819-1:2013 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Foreword
This document (EN ISO 14819-1:2013) has been prepared by Technical Committee ISO/TC 204 “Intelligent
transport systems” in collaboration with Technical Committee CEN/TC 278 “Road transport and traffic
telematics” the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by June 2014, and conflicting national standards shall be withdrawn at
the latest by June 2014.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 14819-1:2003.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 14819-1:2013 has been approved by CEN as EN ISO 14819-1:2013 without any modification.

INTERNATIONAL ISO
STANDARD 14819-1
Second edition
2013-12-01
Intelligent transport systems — Traffic
and travel information messages via
traffic message coding —
Part 1:
Coding protocol for Radio Data System —
Traffic Message Channel (RDS-TMC)
using ALERT-C
Systèmes intelligents de transport — Informations sur le trafic et le
tourisme via le codage de messages sur le trafic —
Partie 1: Protocole de codage pour le système de radiodiffusion de
données (RDS) — Canal de messages d'informations sur le trafic
(RDS-TMC) avec ALERT-C
Reference number
ISO 14819-1:2013(E)
©
ISO 2013
ISO 14819-1:2013(E)
©  ISO 2013
All rights reserved. Unless otherwise specified, 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
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

ISO 14819-1:2013(E)
Contents Page
Foreword . v
Introduction . vii
1 Scope . 1
1.1 General scope . 1
1.2 Content . 1
1.3 Message management . 2
1.4 Transmission . 2
1.5 Event list . 2
2 Normative references . 2
3 Terms, definitions and abbreviated terms . 2
3.1 Terms and definitions . 2
3.2 Abbreviated terms . 5
4 Application . 7
4.1 General . 7
4.2 Definition of the TMC "travel service" . 7
4.3 TMC virtual terminal . 8
4.4 Event-oriented end-user information messages . 8
4.5 Strategic and tactical information . 8
4.6 Geographic relevance . 9
4.7 Transmitted message priority . 9
4.8 Event List . 10
4.9 Future extensions . 10
5 Presentation . 10
5.1 General . 10
5.2 TMC virtual language . 10
5.3 Message content . 11
5.3.1 General . 11
5.3.2 Event Description (11 bits) . 11
5.3.3 Primary Location (16 bits) . 11
5.3.4 Direction and Extent (4 bits) . 12
5.3.5 Duration (3 bits) . 13
5.3.6 Diversion Advice (1 bit) . 14
5.4 Implicit information . 15
5.4.1 Road class and road number . 15
5.4.2 Road segment . 15
5.4.3 Area, region and country . 15
5.4.4 Pre-assigned diversion advice . 15
5.4.5 Urgency within the terminal . 15
5.4.6 Directionality . 15
5.4.7 Duration type . 16
5.4.8 Nature . 16
5.4.9 Update class . 16
5.4.10 Quantifier type . 16
5.5 Optional message content. 16
5.5.1 General . 16
5.5.2 Combination of additional information . 17
5.5.3 Control codes (label 1) . 18
5.5.4 Length of route affected (label 2) . 18
5.5.5 Speed limit (label 3) . 18
ISO 14819-1:2013(E)
5.5.6 Additional quantifiers (labels 4 and 5) .19
5.5.7 Supplementary information (label 6) .19
5.5.8 Start and stop times (labels 7 and 8) .19
5.5.9 Multi-event messages (label 9) .19
5.5.10 Detailed diversion instructions (label 10) .20
5.5.11 Destinations (label 11) .20
5.5.12 Precise location reference (label 12) .20
5.5.13 Cross linkage to source of problem (label 13) .21
5.5.14 Separator (label 14) .22
5.5.15 Other information as defined by sub-labels (label 15) .22
5.5.16 Reference to telephone services (label 15, sub-label 1-2) .22
6 Message management .25
6.1 General .25
6.2 System messages .26
6.2.1 General .26
6.2.2 Location table .26
6.2.3 Terminal requirements .26
6.2.4 Change of database numbers .27
6.3 Message repetition .27
6.4 Message updating.28
6.5 Message deletion .28
6.5.1 General .28
6.5.2 Message persistence .28
6.5.3 Detailed stop-time .29
6.5.4 Silent cancellation message .29
6.5.5 Null message .29
6.6 Message presentation .30
6.7 Out of area referencing .30
6.7.1 Structure of the INTER-ROAD concept.30
6.7.2 INTER-ROAD messages .31
6.7.3 Updating and cancellation of INTER-ROAD messages .31
7 Transmission .32
7.1 General .32
7.2 Format of type 8A groups .32
7.3 Immediate repetition .32
7.4 Single-group user messages .33
7.5 System messages .34
7.5.1 General .34
7.5.2 System information .34
7.5.3 Tuning information .38
7.6 Multi-group messages .40
7.6.1 First group .40
7.6.2 Subsequent groups .41
7.7 Summary of X-bit usage in RDS-TMC type 8A groups .43

iv © ISO 2013 – All rights reserved

ISO 14819-1:2013(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 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. 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. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO's adherence to the WTO principles in the Technical Barriers to Trade (TBT)
see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 204, Intelligent transport systems.
This second edition cancels and replaces the first edition (ISO 14819-1:2003), which has been technically
revised.
ISO 14819 consists of the following parts, under the general title Intelligent transport systems — Traffic and
travel information messages via traffic message coding:
 Part 1: Coding protocol for Radio Data System — Traffic Message Channel (RDS-TMC) using ALERT-C
 Part 2: Event and information codes for Radio Data System — Traffic Message Channel (RDS-TMC)
using ALERT-C
 Part 3: Location referencing for Radio Data System — Traffic Message Channel (RDS-TMC) using
ALERT-C
 Part 6: Encryption and conditional access for the Radio Data System — Traffic Message Channel ALERT
C coding
Compared to previous releases, this version includes the following additions:
 Precise location referencing
 Tendencies of Traffic Queue Lengths (TTQL)
 Coding of parking POIs
 Coding of interrupted roads
ISO 14819-1:2013(E)
 Coding of other isolated POIs (except parking POIs)
 Coding of parallel roads
 Version identification of TMC location tables
 Location Table Exchange Format
 North American Safety Events in TMC
 Explicit Location Table Country Code transmission in TMC
 Guidelines for Service Providers and Terminal Manufacturers for Implementation of explicit Location
Table Country Code transmission
 Coding of link roads
 GB-English - List of Quantifiers
 Additional Event Codes identified by Germany
 Additional TMC Events from Danish proposal
 Additional TMC Supplementary Information: Unconfirmed Report
 RDS-TMC delivery of IVR Telephone Number
 Coding of link roads
vi © ISO 2013 – All rights reserved

ISO 14819-1:2013(E)
Introduction
Traffic and traveller information (TTI) may be disseminated through a number of services and means of
communication to the end user, including static displays (e.g. Variable Message Signs), broadcast audio to
car radios, broadcast data services to in-vehicle equipment (e.g. installed navigation system) and to nomadic
device terminals (e.g. portable navigation device).
For all such services, the data to be disseminated and the message structure involved in the various
interfaces require clear definition and standard formats, in order to allow competitive products to operate with
any received data.
This part of ISO 14819 describes the data specification for TTI messages, together with their network layer
and their service layer, which shall be conveyed by the RDS-TMC feature, specified in IEC 62106 (Second
edition - 2009).
The TTI information chain, from event to end-user is quite complex and the TISA (the Traveller Information
Services Association) value chain shown in Figure 1 helps to understand the key components:

Figure 1 — The Traveller Information Services Association TTI value chain
A number of entities (e.g. companies, businesses) take part in one or more activities to complete the activities
shown in the value chain. Two, in particular are described, for improved understanding:
Service Provider: An organisation that constructs a data service, by gathering data, processing data
and supplying the data service. A Service Provider then negotiates for the use of the necessary data
bandwidth with a Broadcaster and/or Transmission Operator. A Service Provider is responsible for the
"quality" of the content to his customers and must provide suitable customer support.
Broadcaster: A traditionally incorporated organisation responsible for a continuous strand of audio
programmes and their quality. A broadcaster may also be responsible for overall co-ordination of
"broadcast transmissions" (often a Broadcaster is the licensee of a national regulator). A Broadcaster
may also be a Service Provider.
TTI services for travellers, using spoken radio reports and in-vision reports occupy broadcast air-time and
whilst valuable to some, they are considered less useful by others. Furthermore, only some are useful for
travellers on the move. Due to the widespread adoption of the Radio Data System, in VHF/FM broadcasting
on Band II there is the possibility of transmitting coded TTI messages digitally and "silently" using the RDS-
TMC feature, which avoids the interruption of planned programmes. This TTI delivery method has a number of
advantages: TTI messages can be decoded into the language of the end user, regardless of location, more
messages can be made available and planned broadcast programme interruption is avoided, so make
delivery of TTI messages more timely and topical.
The ALERT-C protocol defined in this part of ISO 14819 supports a data broadcasting service for travellers,
providing information about many kinds of traffic and travel events. Messages include traffic incident
information relating to national and regional routes and some urban roads and other information required by a
traveller, such as roadworks and weather information.
ISO 14819-1:2013(E)
This part of ISO 14819 is based on the ALERT-C traffic message coding protocol, which was a product of
DRIVE Project V1029, "RDS Advice and Problem Location for European Road Traffic". The RDS-ALERT
project aimed to define standards for RDS-TMC, working in conjunction with the European Broadcasting
Union (EBU) and the European Conference of Ministers of Transport (ECMT).
The international standard has been implemented in many countries worldwide and, as a result of very
extensive implementation experience, it has matured with many changes from the earliest version of the
ALERT-C proposal of 1990. At that time CEN TC 278 Sub-working group (SWG) 4.1 developed the coding
protocol, herein and the event list described in ISO 14819-2; meanwhile CEN TC 278 SWG 7.3 developed the
location referencing method which is described in ISO 14819-3. Subsequently the TMC Forum was
responsible for collecting specific additions and improvements intended for inclusion in this part of ISO 14819.
Latterly, the Traveller Information Services Association (TISA) took over all responsibility (including TMC
Forum legacy) for maintenance of this part of ISO 14819, which now includes an up to date set of industry
supported enhancements to RDS-TMC.
The RDS system is fully described in IEC 62106 (Second edition, 2009) and it contains the 'hooks' to RDS-
TMC, detailed in this part of ISO 14819. It employs a group structured data protocol. It uses type 3A groups
defined to carry Open Data Application (ODA) identification and service and network layer information. This
enables signalling of the TMC feature in other data groups. It uses type 8A groups defined to carry RDS-TMC
messages and location information, together with TMC service tuning information.
Broadly, two types of RDS-TMC services are required: one that is, in effect, free of charge at the point of use
by an end user and thus uses un-encrypted data, and one that is paid-for using encrypted data. The
conditional access capability was developed by the TMC Forum and is described in ISO 14819-6.
viii © ISO 2013 – All rights reserved

INTERNATIONAL STANDARD ISO 14819-1:2013(E)

Intelligent transport systems — Traffic and travel information
messages via traffic message coding —
Part 1:
Coding protocol for Radio Data System — Traffic Message
Channel (RDS-TMC) using ALERT-C
1 Scope
1.1 General scope
The ALERT-C protocol is designed to provide mostly event-oriented road end-user information messages.
Many "hooks" have been left for future development and a few status-orientated road end-user information
messages were included.
1.2 Content
The presentation section of the ALERT-C protocol specifies messages that may be presented to the user in
accordance with the general requirements set out above. It defines the message structure and content, and its
presentation to the end-user.
RDS-TMC messages are language-independent, and can be presented in the language of the user's choice.
The ALERT-C protocol utilises a standardised Event List (ISO 14819-2) of event messages with their code
values, which also includes general traffic problems and weather situations.
ALERT-C defines two categories of information within messages: basic and optional items. In principle, basic
information is present in all messages. Optional information can be added to messages where necessary.
Standard RDS-TMC user messages provide the following five basic items of explicit, broadcast information:
1. Event description, giving details of road event situations, general traffic problems and weather situations
(e.g. congestion caused by accident) and where appropriate its severity (e.g. resulting queue length).
2. Location, indicating the area, road segment or point location where the source of the problem is situated.
3. Direction and Extent, identifying the adjacent segments or specific point locations also affected by the
incident, and where appropriate the direction of traffic affected.
4. Duration, giving an indication of how long the problem is expected to last.
5. Diversion advice, showing whether or not end-users are recommended to find and follow an alternative
route.
Optional information can be added to any message using one or more additional RDS data groups. This
optional addition can give greater detail or can deal with unusual situations. Any number of additional fields
can in principle be added to each basic message, subject only to a maximum message length of five RDS
data groups.
ISO 14819-1:2013(E)
1.3 Message management
The message management component deals with the message management functions of RDS-TMC. The
ALERT-C protocol distinguishes between user messages and system messages. User messages are those
potentially made known to the end-user, as defined in the presentation section. System messages are of use
only to the RDS-TMC terminal, for message management purposes.
1.4 Transmission
The transmission component conveys the messages over-air. The ALERT-C protocol, which RDS-TMC uses,
retains the fundamental approach of earlier work, which aims to code most messages entirely within a single
RDS group.
RDS-TMC information comprises both ‘system information’ and ‘user messages’. System information relates
to the particular TMC service, and details the parameters that the terminal needs to be able to find identify and
decode the TMC information. System information is transmitted in type 3A groups and in type 8A groups.
User messages contain the details of the traffic events; these may use one or more type 8A groups. Most
messages may be transmitted using a single type 8A group, however messages with more detail (e.g.
diversion advice) may use up to a total of five, type 8A groups.
1.5 Event list
The ALERT-C Event List contains all event descriptions. It is described in ISO 14819-2.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 4217:2008, Codes for the representation of currencies and funds
ISO 8601:2004, Data elements and interchange formats — Information interchange — Representation of
dates and times
ISO 14819-2, Intelligent transport systems — Traffic and travel information messages via traffic message
coding — Part 2: Event and information codes for Radio Data System — Traffic Message Channel (RDS-
TMC) using ALERT-C
ISO 14819-3, Intelligent transport systems — Traffic and travel information messages via traffic message
coding — Part 3: Location referencing for Radio Data System — Traffic message Channel (RDS-TMC) using
ALERT-C
IEC 62106:2009, Specification of the radio data system (RDS) for VHF/FM sound broadcasting in the
frequency range from 87.5 to 108.0 MHz
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2 © ISO 2013 – All rights reserved

ISO 14819-1:2013(E)
3.1.1
Application Identifier
signals the specific group type used by the Open Data Application
Note 1 to entry: Defined in the RDS specification IEC 62106.
3.1.2
Continuity Index Field
helps distinguish between different multi-group messages
Note 1 to entry: All groups within any particular multi-group message contain the same value of this continuity index.
3.1.3
Country Code
assigns a code to each country
Note 1 to entry: Country codes are not unique to one country and can be repeated in non-neighbouring countries.
Note 2 to entry: In RDS, The Country Code is transmitted in the first 4-bits of the PI code to signal the origin of the audio
programme, which may be different to the country where the transmitter is located.
Note 3 to entry: Defined in the RDS specification IEC 62106.
3.1.4
Direction and Extent
identifies the adjacent segments or specific point locations also affected by the incident, and where
appropriate the direction of traffic affected
3.1.5
Diversion Advice
shows whether or not end-users are recommended to find and follow an alternative route
3.1.6
Duration
gives an indication of how long the problem is expected to last
3.1.7
End-user
covers the meaning for all possible terminal clients
Note 1 to entry: This could be a vehicle driver, a user of a portable or fixed TMC receiver or an intelligent client that
processes the information such as in a navigation system.
3.1.8
Event Description
gives details of the traffic problem (e.g. congestion caused by accident) and where appropriate its severity (e.g.
resulting queue length) or weather situation
3.1.9
Event List
agreed table of event descriptions and parameters, assigning an event code value and giving the details of
traffic problem (e.g. congestion caused by accident) and where appropriate its severity (e.g. resulting queue
length) or the weather situation
Note 1 to entry: Defined in ISO 4217:2008.
3.1.10
Foreign Location Table
location table which is different from the default location table used by the transmitter
ISO 14819-1:2013(E)
3.1.11
INTER-ROAD
way of referencing locations from other location tables via special multi-group messages
Note 1 to entry: These messages can be used to inform end-users about problems in other areas, in particular in
neighbouring countries.
3.1.12
Extended Country Code
assigns a unique code to each country
Note 1 to entry: The combination of ECC and CC algother assigns a unique code for each country.
Note 2 to entry: Defined in the RDS specification IEC 62106.
3.1.13
Location
indicates the area, road segment or point location where the source of the problem is situated
3.1.14
Location Table
agreed table which contains for each service information the area, road segment or point location where the
source of the problem is situated
Note 1 to entry: Each location table is identified by three elements: a Number – Location Table Number, a Location Table
Country Code, and a Location Table Extended Country Code. The combination of these three elements identifies a
Location Table uniquely. Each service has a Location Table defined by Location Table Number, a Location Table Country
Code and Location Table Extended Country Code.
3.1.15
Location Table Country Code
assigns a code to each location table, based on the country of origin of the locations referenced in this table
3.1.16
Location Table Extended Country Code
assigns a code to each location table, based on the country of origin of the locations referenced in this table
Note 1 to entry: Together the LTECC, LTCC and LTN identify a location database uniquely.
3.1.17
Open Data Application
provides the means for adding applications to an RDS transmission
Note 1 to entry: Defined in the RDS specification IEC 62106.
3.1.18
Programme Identifier
assigns a unique value to each audio programme source
Note 1 to entry: Defined in the RDS specification IEC 62106.
3.1.19
Programme Identifier Country Code
first four bits of the Programme Identifier are identical with Country Code if the RDS specification IEC 62106 is
implemented
Note 1 to entry: The CC is signalled in the RDS PI Code for purposes of identifying the country of origin of the audio
programme.
Note 2 to entry: Usually the Programme Identifier Country Code and the Location Table Country Code on an RDS-TMC
transmission have the same value, but not always nor necessarily.
4 © ISO 2013 – All rights reserved

ISO 14819-1:2013(E)
3.1.20
Silent Cancellation Message
used to delete messages from the end-user terminal
3.1.21
Service-ID
used to uniquely identify a particular TMC service from a service provider
3.1.22
System Information
enables an RDS-TMC terminal to decode and evaluate essential data, which describes the transmission being
received
Note 1 to entry: System Information indicates an RDS-TMC service and comprises some service characteristics needed to
select the RDS-TMC service.
3.1.23
Terminal
provides the user interfaces with the TMC service
Note 1 to entry: Their functionality may cover a range of terminal functions from simple terminals with a limited message
repertoire and restricted location database to more sophisticated terminals offering full TMC message features and/or a
wide range of strategic and tactical location databases.
3.1.24
Tuning Information
enables a RDS-TMC terminal to change from one transmitter to another at boundaries of a particular
transmitter’s coverage
Note 1 to entry: Each transmitter should direct the RDS-TMC terminal to specific frequencies or TMC services in adjacent
areas.
3.1.25
User Message
describes the messages which are potentially made known to the end-user
Note 1 to entry: They contain event, location, direction and extent, duration etc. descriptions.
3.1.26
TISA
not-for-profit membership organisation established under Belgian law aiming at developing and maintaining
worldwide traffic and traveller information standards such TMC and TPEG
3.2 Abbreviated terms
For the purposes of this document, the following abbreviated terms apply.
3.2.1
AF
Alternative Frequency - an RDS feature
3.2.2
AFI
Alternative Frequency Information - an RDS-TMC feature
3.2.3
AID
Application Identifier - an RDS feature
ISO 14819-1:2013(E)
3.2.4
ALERT-C
Advice and Problem Location for European Road Traffic, Version C
3.2.5
CC
Country Code - an RDS feature
3.2.6
CT
Clock Time - an RDS feature
3.2.7
EBU
European Broadcasting Union
3.2.8
ECC
Extended Country Code -an RDS feature
3.2.9
ECMT
European Conference of Ministers of Transport
3.2.10
IVR
Interactive Voice Response – an information telephone call, typically automated
3.2.11
LTCC
Location Table Country Code
3.2.12
LTECC
Location Table Extended Country Code
3.2.13
LTN
Location Table Number
3.2.14
MGS
Message Geographical Scope
3.2.15
ODA
Open Data Application –an RDS feature
3.2.16
ON
Other Network - an RDS feature
3.2.17
PI
Programme Identifier - an RDS feature
3.2.18
PICC
Programme Identifier Country Code
6 © ISO 2013 – All rights reserved

ISO 14819-1:2013(E)
3.2.19
RDS
Radio Data System
3.2.20
rfu
Reserved for future use
3.2.21
SID
Service-ID
3.2.22
TISA
Traveller Information Services Association
3.2.23
TMC
Traffic Message Channel
3.2.24
TN
Tuned Network
3.2.25
UTC
Universal Co-ordinated Time
4 Application
4.1 General
Spoken broadcast traffic messages already provide a valuable information service to motorists in countries
throughout Europe. Digital broadcasting techniques have now become available due to the widespread
adoption of the Radio Data System (RDS). RDS enables traffic messages to be carried digitally and silently by
a Traffic Message Channel (TMC), without necessarily interrupting the audio programme.
The ALERT-C protocol defined in this specification supports a digital, s
...