EN ISO 14819-3:2004

SLOVENSKI STANDARD
01-maj-2004
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Traffic and Travel Information (TTI) - TTI messages via traffic message coding - Part 3:
Location referencing for ALERT-C (ISO 14819-3:2004)
Verkehrs- und Reisinformtionen (TTI) - TTI-Meldungen über
Verkehrsmeldungscodierung - Teil 3: Ortskodierung für ALERT-C (ISO 14819-3:2004)
Information Trafic et Voyageurs (TTI) - Messages TTI via le codage de messages -
Partie 3: Localisants pour ALERT-C (ISO 14819-3:2004)
Ta slovenski standard je istoveten z: EN ISO 14819-3:2004
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 14819-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2004
ICS 03.220.20; 35.240.60
English version
Traffic and Travel Information (TTI) - TTI messages via traffic
message coding - Part 3: Location referencing for ALERT-C
(ISO 14819-3:2004)
Verkehrs- und Reisinformtionen (TTI) - TTI-Meldungen über
Verkehrsmeldungscodierung - Teil 3: Ortskodierung für
ALERT-C (ISO 14819-3:2004)
This European Standard was approved by CEN on 3 November 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14819-3:2004 E
worldwide for CEN national Members.

Contents
page
Contents. 2
Foreword. 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Abbreviations. 5
4 Location coding . 6
4.1 General. 6
4.2 Location tables . 6
4.3 TMC Location categories, types and subtypes . 10
4.4 Location table content . 10
4.5 Detailed junction referencing. 15
4.6 Detailed situation locations. 15
4.7 One and two way locations . 16
Annex A (normative) TMC Location categorie, types and subtypes. 19
A.1 Area locations . 19
A.2 Linear locations. 22
A.3 Point locations . 24
Annex B (normative) Location table numbers. 29
Annex C (informative) Background information. 30
C.1 Overall approach. 30
C.2 Methods . 32
Bibliography . 38
Foreword
This document (EN ISO 14819-3:2004) has been prepared by Technical Committee CEN/TC 278, "Road
transport and traffic telematics", the secretariat of which is held by NEN, in co-operation with ISO/TC 204
“Transport information and control systems”.
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 September 2004, and conflicting national standards shall be
withdrawn at the latest by September 2004.
This document supersedes ENV ISO 14819-3:2000
Annexes A and B are normative. Annex C is informative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain,
Sweden, Switzerland and the United Kingdom.
Introduction
This document sets out ways of specifying places and positions in traffic and travel information messages,
including RDS-TMC messages (the Radio Data System - Traffic Message Channel).
It defines the structure and semantics of location tables for Traffic Information Centres (TICs) and receivers.
b) TRAFFIC AND TRAVEL MESSAGES
1) Traffic and travel information is created and updated in an originating database, by human
operators or automated systems. Information is transferred to one or more remote systems by
means of messages.
2) In this context, a message is a collection of data which is exchanged to convey information for an
agreed purpose between two or more parties. Traffic and travel messages are digitally coded sets
of data exchanged by interested parties, which convey information about traffic, travel and/or
transport networks. Digital coding can be alphanumeric, as in EDIFACT, or binary, as in RDS-TMC.
3) The traffic and travel messages developed in programmes of the European Union are open, non-
proprietary proposals for standards intended to serve the public interest by facilitating
interconnection and interoperability of the relevant information systems.
c) LOCATION REFERENCING
1) Location references provide the means of saying where in traffic and travel messages.
1 Scope
This standard primarily addresses the needs of RDS-TMC ALERT-C messages, which are already being
implemented. However, the modular approach used here is intended to facilitate future extension of the
location referencing rules to other traffic and travel messaging systems.
The location referencing rules defined in this standard address the specific requirements of Traffic Message
Channel (TMC) systems, which use abbreviated coding formats to provide TTI messages over mobile
bearers (e.g. GSM, DAB) or via exchange protocols like DATEX. In particular, the rules address the Radio
Data System - Traffic Message Channel (RDS-TMC), a means of providing digitally-coded traffic and travel
information to travellers using a silent data channel (RDS) on FM radio stations, based on the ALERT-C
protocol.
2 Normative references
This European Standard incorporates, by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply
to this European Standard only when incorporated in it by amendment or revision. For undated references
the latest edition of the publication referred to applies (including amendments).
IEC 62106 Specification of the radio data system (RDS) for VHF/FM sound broadcasting in
the frequency range from 87,5 to 108,0 MHz (IEC 62106:2000)
EN ISO 14819-1 Traffic and Travel Information (TTI) - TTI Messages via traffic message coding -
Part 1: Coding protocol for Radio Data System - Traffic Message Channel
(RDS-TMC) using ALERT – C (ISO 14819-1:2003)
Geographic Data Files (ISO 14825:1996)
ENV ISO 14825
3 Abbreviations
For the purposes of this European Standard, the following abbreviations apply:
CENELEC Comité Européen de Normalisation ELECtrotechnique
DATEX DATa Exchange protocol for exchange of traffic and travel information between traffic centres
ECC Extended Country Code (an RDS feature)
EDIFACT Electronic Data Interchange For Administration Commerce and Transport
GDF Geographic Data Files (ENV ISO 14825 for modelling and exchange of geographic data for
transport telematics applications.)
RDS Radio Data System (digital information channel on FM sub carrier)
TIC Traffic Information Centre
TMC Traffic Message Channel
TTI Traffic and Travel Information
WGS 84 World Geodetic System 1984
4 Location coding
4.1 General
Location references used by RDS-TMC are covered by the location referencing rules defined in this section.
The ALERT-C coding protocol for RDS-TMC is defined in EN ISO 14819-1.
ALERT-C supports a digital, silent data broadcast service for motorists, providing information about many
kinds of traffic situations. This includes roadwork, weather and traffic incident information relating to major
national and international roads, regional roads and local or urban roads.
4.2 Location tables
4.2.1 General
Within RDS-TMC, locations are identified and referenced by their location code. A given RDS-TMC service
uses a pre-defined location table, containing the pre-stored details of the locations that can be referenced in
messages from that service.
A location code in such a message refers and serves as a tabular ‘address’ of the pre-stored location details
in the location table used by the service. A real world location may have more than one location code within
the same location table. However, within a given location table, each location code refers to one and only
one location. A location code has a number in the range 1 to 63,487.
Note: In ALERT-C, a further 2048 numbers are reserved for INTER-ROAD (see EN ISO 14819-1) and other forms of
referencing.
A table may contain a maximum number of 65,536 codes allocated in the following way:
Location code Use
0 reserved
1 - 63,487 free for normal location coding
63,488 - 64,511 for special purposes
64,512 - 65,532 for INTER-ROAD
64,533 - 65,535 special functions
Note: INTER-ROAD is a coding mechanism within ALERT-C to reference in a specific type of ALERT-C message (the
INTER-ROAD message) a location belonging to a different location table. This can be a table in the same country as well
as a table in another country.
4.2.2 Hierarchical structure
RDS-TMC location tables use a hierarchical structure of pre-defined locations. A system of pointers provides
upward references to higher-level locations of which the specified location forms a part.
Example: Kent would have an upward area reference to south-east England. South-east England may be referenced up
to the UK, then the British Isles, then Europe, etc. (Figure 1).
Key
A County of Kent
B South East England
C United Kingdom
D British Isles
E Europe
Figure 1 — Upward Area Referencing
Junction 25 on the M1 motorway in UK would have a linear reference to a motorway segment, e.g.
Leicester - Sheffield. This segment could then be referenced up to the whole road (the M1 Motorway).
Hierarchical tables help to make location referencing simple and unambiguous. A major benefit of
hierarchical tables is that they facilitate automated sorting and selection of information for users. However,
both hierarchical and unstructured tables are currently used in various applications.
4.2.3 Offsets
Most point l
...