EN ISO 14819-3:2013

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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 (ISO 14819-3:2013)
Intelligente Transportsysteme - Verkehrs- und Reiseinformationen über
Verkehrsmeldungskodierung - Teil 3:Ortsreferenzierung für den digitalen Radio für
Verkehrsmeldungen (RDS-TMC) unter Nutzung von ALERT-C (ISO 14819-3:2013)
Systèmes intelligents de transport - Informations sur le trafic et le tourisme via le codage
de messages sur le trafic - Partie 3: Références de localisants pour le système de
radiodiffusion de données (RDS) - Canal de messages d'informations sur le trafic (RDS-
TMC) avec ALERT-C ((ISO 14819-3:2013)
Ta slovenski standard je istoveten z: EN ISO 14819-3:2013
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 14819-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2013
ICS 03.220.20; 35.240.60 Supersedes EN ISO 14819-3:2004
English Version
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 (ISO 14819-3:2013)
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 3: Références de localisants pour le système de 3: Ortsreferenzierung für den digitalen Radio 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 14819-3:2013)
14819-3:2013)
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 14819-3:2013 E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 14819-3:2013) has been prepared by Technical Committee ISO/TC 204 “Intelligent
transport systems” in collaboration with Technical Committee CEN/TC 278 “Intelligent transport systems” 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 14819-3:2004.
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 14819-3:2013 has been approved by CEN as EN ISO 14819-3:2013 without any modification.

INTERNATIONAL ISO
STANDARD 14819-3
Second edition
2013-12-01
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
Systèmes intelligents de transport — Informations sur le trafic et le
tourisme via le codage de messages sur le trafic —
Partie 3: Références de localisants pour le système de radiodiffusion de
données (RDS) — Canal de messages d'informations sur le trafic
(RDS-TMC) avec ALERT-C
Reference number
ISO 14819-3:2013(E)
©
ISO 2013
ISO 14819-3:2013(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
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Published in Switzerland
ii © ISO 2013 – All rights reserved

ISO 14819-3:2013(E)
Contents Page
Foreword . v
Introduction . vii
1 Scope . 1
2 Normative references . 1
3 Abbreviated terms . 1
4 Location coding . 2
4.1 General . 2
4.2 Location tables . 3
4.2.1 General . 3
4.2.2 Versions and versioning of location tables . 3
4.2.3 Exchanging location tables . 4
4.2.4 Hierarchical structure . 4
4.2.5 Offsets . 5
4.2.6 Location types . 6
4.2.7 Direction of the road . 6
4.2.8 Country codes and location table numbers . 6
4.2.9 Constraints . 7
4.3 TMC Location categories, types and subtypes . 7
4.4 Location table content . 7
4.4.1 General . 7
4.4.2 Nominal record content . 7
4.4.3 Road descriptions . 12
4.4.4 Names . 12
4.4.5 Upward references . 12
4.4.6 Offsets . 13
4.4.7 Urban . 13
4.4.8 Intersection reference . 13
4.4.9 WGS 84 co-ordinates . 13
4.4.10 InterruptsRoad . 13
4.5 Detailed junction referencing . 14
4.5.1 Conventional junctions . 14
4.5.2 Complex junctions . 14
4.5.3 Detailed coding of link roads . 14
4.6 Detailed situation locations . 15
4.6.1 Normal location referencing . 15
4.6.2 Detailed location referencing . 15
4.6.3 Precise location referencing . 15
4.7 One and two way locations . 15
4.7.1 Basic principles . 15
4.7.2 Junctions . 15
4.7.3 Locations having only an exit or entry and locations occurring on one side only . 15
Annex A (normative) TMC Location categories, types and subtypes . 18
A.1 General . 18
A.2 Area locations . 18
A.3 Linear locations . 20
A.4 Point locations . 22
Annex B (normative) Location table numbers . 28
Annex C (normative) Detailed methods for the usage of location tables . 31
ISO 14819-3:2013(E)
C.1 Methods for referencing affected road sections .31
C.1.1 General .31
C.1.2 Pre-defined primary location + extent .31
C.1.3 Pre-defined primary and secondary locations .32
C.1.4 Distance markers (primary location + extent).32
C.1.5 Distance markers (primary + secondary location) .33
C.1.6 Primary and secondary locations using pre-defined location, extent and distances .33
C.1.7 Primary and secondary locations using pre-defined locations + distances .34
C.1.8 Describing the extent of an event in ALERT-C .34
C.1.9 Co-ordinates (primary + secondary locations) .36
C.1.10 Proprietary referencing systems, e.g. GDF .36
C.1.11 Text location naming .36
C.1.12 Precise location referencing .36
C.2 Methods for referencing specific features .40
C.2.1 Parking facilities .40
C.2.2 Other isolated POIs .42
C.2.3 Parallel Roads .43
C.2.4 Interrupted Roads .45
C.3 Methods for identifying and exchanging location tables .46
C.3.1 Identifying versions of a location table .46
C.3.2 Exchanging location tables – the Location Table Exchange Format .46
Annex D (informative) Background information .66
D.1 Overall approach.66
D.1.1 General .66
D.1.2 Pre-defined locations .66
D.1.3 GDF features .67
Bibliography . Error! Bookmark not defined.

iv © ISO 2013 – All rights reserved

ISO 14819-3:2013(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 14819-3:2004), 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 14819-3:2013(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 14819-3:2013(E)
Introduction
This part of ISO 14819 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.
a) 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.
b) Location referencing.
The location referencing component of a traffic and travel message enables a service provider to indicate the
physical location of the event being described. The management of TMC location databases requires on-
going maintenance. It is necessary to both manage location database ID allocation for countries implementing
TMC services and to validate new and updated location databases when ground features change. These
activities are led by service providers who also need to ensure that their end-users are kept up-to-date. The
Traveller Information Services Association (www.tisa.org) manages the ID allocation on a worldwide basis.
TISA provides location database validation for service providers who generally arrange location database
updates on a bi-annual cycle.
INTERNATIONAL STANDARD ISO 14819-3:2013(E)

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
1 Scope
This part of ISO 14819 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 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 part of ISO 14819 address the specific requirements of Traffic
Message Channel (TMC) systems, which use abbreviated coding formats to provide TTI messages. 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
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/IEC 8859-15:1999, Information technology — 8-bit single-byte coded graphic character sets — Part 15:
Latin alphabet No. 9
ISO/IEC 10646:2012, Information technology — Universal Coded Character Set (UCS)
ISO 14819-1:2013, 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 14825:2011, Intelligent transport systems — Geographic Data Files (GDF) — GDF5.0
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
NIMA Technical Report TR8350.2, US Department of Defense
3 Abbreviated terms
For the purposes of this document, the following abbreviated terms apply:
ISO 14819-3:2013(E)
ALERT-C Advice and problem Location for European Road Traffic, Version C
ASCII American Standard Code for Information Interchange
CCD Country code
CID Country Identifier
CLST Code of Location Subtype
CNAME Country name
ECC Extended Country Code (an RDS feature)
EDIFACT Electronic Data Interchange For Administration Commerce and Transport
GDF Geographic Data Files (ISO 14825 for modelling and exchange of geographic data for
transport telematics applications.)
LC Location Code
LTCC Location Table Country Code
LTN Location Table Number
NIMA National Imagery and Mapping Agency (US)
POI Point of Interest
RDS Radio Data System (digital information channel on FM sub carrier)
TIC Traffic Information Centre
TISA Traveller Information Services Association
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 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/IEC 8859-15:1999, Information technology — 8-bit single-byte coded graphic character sets — Part 15:
Latin alphabet No. 9
ISO/IEC 10646:2012, Information technology — Universal Coded Character Set (UCS)
2 © ISO 2013 – All rights reserved

ISO 14819-3:2013(E)
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 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/IEC 8859-15:1999, Information technology — 8-bit single-byte coded graphic character sets — Part 15: Latin
alphabet No. 9
ISO/IEC 10646:2012, Information technology — Universal Coded Character Set (UCS)
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 Versions and versioning of location tables
Once a location has been allocated, it cannot easily be re-allocated (in an RDS-TMC/ALERT-C environment).
Therefore, all existing locations and their associated location codes in a given location table should be
regarded as fixed. However, other attributes of a location may, within certain constraints, sometimes change
(e.g. name, positive offset, negative offset).
Within each location table, space (unallocated location codes) shall be left to accommodate future
requirements for additional locations (to deal with new construction, and location referencing requirements not
originally foreseen).
Whenever new locations are added to, or removed from, a location table (for example to extend coverage or
to reflect changes to the road network), the resulting table shall be treated as a new version. The creation and
tracking of versions of a location table allows the evolution of a location table to be understood and supports
ISO 14819-3:2013(E)
the successful use of the table and associated TMC service. A new version of an existing location table must
remain compatible with the previous versions of the same location table – the changes must not be such that
the location of a TMC message could be wrongly interpreted by a receiver. For example, location codes which
are deleted should not be used for a long period. Also changing the attributes class and type of a location
might cause an incompatible version of the table. It is part of TISA's location certification process to judge if a
table is backwards compatible.
The method for identifying and labelling different versions of a location table is shown in Annex C.3.1
TISA has established an allocation of location tables to show which are in use or available for use in each
country. The responsible agency in a country can apply for additional location table numbers in future, to
support further applications or more detailed, regional location tables. New tables can also be issued
occasionally to allow for complete updates to existing tables. Such major changes will however be very
disruptive for users, as existing receivers will not recognise TMC messages relating to the new location table
unless the same location table is also installed in the receiver. Switches from one location table to a different
one (rather than a new version of the same table) should therefore be avoided as far as possible, especially in
established markets.
4.2.3 Exchanging location tables
For TMC services to work well, the different organisations involved need to be able to understand the location
table number, version and contents. To achieve this, a Location Table Exchange Format has been defined.
This format will be used for the exchange of TMC Location Tables between the various functional areas, e.g.
receiver manufactures, map providers, certification of TMC location tables, Traffic Information Centres and
service providers.
The Location Table Exchange Format specifies the information that must be provided as part of a location
table, and the way in which it is to be presented. The Location Table Exchange Format aims to provide a
complete and precise description of a TMC Location table, that is readable from software programs without
any changes or adaptations.
A location table defined using the Location Table Exchange Format consists of a series of text files, each
containing a set of records made up of predefined fields. The method for using the Location Table Exchange
Format is defined in Annex C.3.2.
4.2.4 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).
4 © ISO 2013 – All rights reserved

ISO 14819-3:2013(E)
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.
4.2.5 Offsets
Most point locations and certain linear locations point to previous and next locations of the same type. This is
indicated by negative and positive offsets.
Example Junction 25 on a motorway may be offset to Junction 26 in the positive direction, and to Junction 24 in
the negative direction. A sign convention adopted at the time of coding locations specifies the positive direction of travel
along each road (Figure 2).
ISO 14819-3:2013(E)
Key
a positive direction
b negative offset
c positive offset
Figure 2 — Offsets
4.2.6 Location types
Location types and subtypes are required for language independence of the information given, and to tell the
receiving system what data fields to expect.
At the highest level, locations fall into three categories:
a) area locations
b) linear locations
c) point locations
Within each category, location types are distinguished (in principle) whenever a location is functionally distinct
in the way it shall be handled by the message recipient. Therefore a set of predefined location types and
subtypes is set out in Annex A.
Subtypes can be used to give further details of (for example) facilities available at a particular location, such
as a service area. The current list, in Annex A, will be added to as further needs are agreed.
Official translations of the language-independent terms that describe location types and subtypes should be
agreed on a national level.
4.2.7 Direction of the road
The predefined direction of the road (see 4.2.3) is reflected in the positive and negative offsets in the location
table and in the order of the names of the end points of a road or road segment (see Table 1).
When newly specifying positive directions along roads within pre-defined tables, it is recommended to use
geographic positive directions relative to the co-ordinate system, i.e. on the Northern Hemisphere from south
to north and from west to east.
For ring roads the clockwise travel direction is recommended positive.
In any case it is not allowed to reverse the direction along continuous and / or connecting segments of a road,
e.g. at administrative borders.
4.2.8 Country codes and location table numbers
With ALERT-C, it is assumed that RDS-TMC service and location tables are organised and defined on a
country-by-country basis. Therefore each service and each location table is associated to a country code in
the range 1-15 (hexadecimal 1-F) as described in IEC 62106. A service and the location table it uses shall
6 © ISO 2013 – All rights reserved

ISO 14819-3:2013(E)
have the same country code. There can be more than 1 location table per country. They are distinguished by
an additional location table number in the range 1-63. Country codes are not unique. The extended country
code (ECC, see IEC 62106) is therefore available in addition. The combination of extended country code
(8 bits), country code (4 bits), location table number (6 bits) and location code (16 bits) defines an extended
location code, which is unique worldwide.
TISA has established an allocation of location table numbers for each country, given in Annex B. As far as
possible, the allocated combinations of country code and location table number define a location table
uniquely, regardless of extended country code. This ensures support for countries where, for historical
reasons, the extended country code is not in use. As can be concluded from Annex B, a country like e.g.
Austria can have at most 8 location tables.
4.2.9 Constraints
Constraints on location coding may in future be agreed, modelled and documented. At present, however,
national authorities and/or service providers are free to allocate location codes within a location table as they
wish, to locations specified in accordance with these rules.
4.3 TMC Location categories, types and subtypes
Location categories, types and location subtypes are standardised, and specified in Annex A. Each location is
described by a code, which is composed of:
 a character (A, L or P), indicating the location category (area, linear or point),
 a number indicating the type,
 a dot,
 a number indicating a subtype.
EXAMPLE 1 P1.8 - roundabout (P = point, P1 = junction)
For types for which not a subtype is defined, the subtype code 0 (zero) has to be used to define the type as a
subtype.
EXAMPLE 2 A3.0 – country
4.4 Location table content
4.4.1 General
The location table content is fixed only for the purposes of definition and exchange. The information used
within specific applications or by individual manufacturers is not fixed, and is not within the scope of these
specifications.
For international consistency, one single location table content shall be adhered to for definition and exchange
purposes. In this structure, some items are mandatory; some items are mandatory where they exist; and some
items are optional.
4.4.2 Nominal record content
The nominal content of each record in the location table is as follows:
 location code,
 code of location (sub) type,
ISO 14819-3:2013(E)
 road/junction number,
 road name,
 first name,
 second name,
 area reference,
 linear reference,
 negative offset,
 positive offset,
 urban,
 intersection reference,
 WGS 84 co-ordinates (longitude and latitude) conforming to NIMA Technical Report TR8350.2.
Not all of these items shall be present in every record. Table 1 indicates which references are required and/or
allowed, according to location type.

8 © ISO 2013 – All rights reserved

ISO 14819-3:2013(E)
Table 1 — Content of location table for ALERT-C
inter-
loc- road/ WGS 84
code of location road section Interrupts
ation junction first name second name area reference linear reference negative offset positive offset urban co-
(sub) type name refer- Road
code number ordinates
ence
(M) continent - - name (M) - - - - - - - - -
Area
(M) country group - - name (M) - country group or - - - - - - -
continent (M)
(M) country - - name (M) - country group or - - - - - - -
continent (M)
(M) other area (water - - name (M) - lowest order - - - - - - -
area, fuzzy area, administrative area
application or other area (m)
region)
(M) nth order area - - name (M) - nth order area (M) - - - - - - -
(n = 1 to 5)
2 2
(M) road (m) (m) negative end positive end nth order area or - - - - - - -
name (M) name (M) country (M)
Linear
2 2
(M) ring road (m) (m) name (O) - nth order area or - - - - - - -
country (M)
2 2
(M) nth order segment (m) (m) negative end positive end nth order area or first order segment, preceding subsequent - - - -
(n = 1, 2) name (M) name (M) country or other road or ring road (M) nth order nth order
area (O) segment (m) segment (m)
(M) urban street - (M) name (O) name (O) nth order area or - - - - - - -
other area (M)
(M) vehicular link - (m) negative end positive end nth order area or - - - - - - -
name (M) name (M) other area (O)
(M) link road - - origin road destination lowest order - - - - - - -
administrative area
number and road number
origin end and or other area of the
name (M) destination intersection to
end name which the link road
(M) belongs (m)
11 11
(M) parallel road (m) (m) negative end positive end lowest order - - - - - - -
12 12
name (M) name (M) administrative area
or other area (M)
ISO 14819-3:2013(E)
10 © ISO 2013 – All rights reserved
inter-
loc- road/ WGS 84
code of location road section Interrupts
ation junction first name second name area reference linear reference negative offset positive offset urban co-
(sub) type name refer- Road
code number ordinates
ence
3 3 9
(M) junction (m) (O) junction name road number lowest order lowest order preceding subsequent (M) (m) (M) (m)
(m) or name of administrative area segment, road or point (m) point (m)
Point
intersecting or other area (M) ring road (M)
road (O)
(M) intermediate point - - point descriptor - lowest order lowest order preceding subsequent (M) - (M) (m)
(M) administrative area segment, road or point (m) point (m)
or other area (M) ring road (M)
...