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 14819-2:2021)

ISO 14819-1 describes the ALERT-C protocol concept and message structure used to achieve densely
coded messages to be carried in the RDS-TMC feature. This document specifies the ‘Events List’ to be
used in coding those messages.

Intelligente Transportsysteme - Verkehrs- und Reiseinformationen über Verkehrsmeldungskodierung - Teil 2: Ereignis- und Informationscodes für den digitalen Radiokanal für Verkehrsmeldungen (RDS-TMC) unter Nutzung von ALERT-C (ISO 14819-2:2021)

Systèmes intelligents de transport - Informations sur le trafic et le tourisme via le codage de messages sur le trafic - Partie 2: Codes d'événements et d'informations pour le système de radiodiffusion de données (RDS) - Canal de messages d'informations sur le trafic (RDS-TMC) avec ALERT-C (ISO 14819-2:2021)

Inteligentni transportni sistemi - Sporočila prometnih in potovalnih informacij prek kodiranih prometnih sporočil - 2. del: Kode za dogodke in informacije za radijski podatkovni sistem (RDS) - Prometni informacijski kanal (RDS-TMC), ki uporablja sistem ALERT-C (ISO 14819-2:2021)

General Information

Status
Published
Public Enquiry End Date
10-Nov-2019
Publication Date
04-May-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
29-Mar-2021
Due Date
03-Jun-2021
Completion Date
05-May-2021

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SLOVENSKI STANDARD
SIST EN ISO 14819-2:2021
01-junij-2021
Nadomešča:
SIST EN ISO 14819-2:2014

Inteligentni transportni sistemi - Sporočila prometnih in potovalnih informacij prek

kodiranih prometnih sporočil - 2. del: Kode za dogodke in informacije za radijski

podatkovni sistem (RDS) - Prometni informacijski kanal (RDS-TMC), ki uporablja
sistem ALERT-C (ISO 14819-2:2021)

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 14819-2:2021)
Intelligente Transportsysteme - Verkehrs- und Reiseinformationen über

Verkehrsmeldungskodierung - Teil 2: Ereignis- und Informationscodes für den digitalen

Radiokanal für Verkehrsmeldungen (RDS-TMC) unter Nutzung von ALERT-C (ISO
14819-2:2021)

Systèmes intelligents de transport - Informations sur le trafic et le tourisme via le codage

de messages sur le trafic - Partie 2: Codes d'événements et d'informations pour le

système de radiodiffusion de données (RDS) - Canal de messages d'informations sur le

trafic (RDS-TMC) avec ALERT-C (ISO 14819-2:2021)
Ta slovenski standard je istoveten z: EN ISO 14819-2:2021
ICS:
03.220.20 Cestni transport Road transport
35.240.60 Uporabniške rešitve IT v IT applications in transport
prometu
SIST EN ISO 14819-2:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 14819-2:2021
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SIST EN ISO 14819-2:2021
EN ISO 14819-2
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2021
EUROPÄISCHE NORM
ICS 03.220.20; 35.240.60 Supersedes EN ISO 14819-2:2013
English Version
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-
2:2021)

Systèmes de transport intelligents - Informations sur le Intelligente Transportsysteme - Verkehrs- und

trafic et les déplacements via le codage de messages Reiseinformationen über Verkehrsmeldungskodierung

sur le trafic - Partie 2 : Codes d'évènements et - Teil 2: Ereignis- und Informationscodes für den

d'informations pour le système de radiodiffusion de digitalen Radiokanal für Verkehrsmeldungen (RDS-

données - canal de messages d'informations sur le TMC) unter Nutzung von ALERT-C (ISO 14819-2:2021)

trafic (RDS-TMC) avec Alert-C (ISO 14819-2:2021)
This European Standard was approved by CEN on 30 July 2020.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14819-2:2021 E

worldwide for CEN national Members.
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SIST EN ISO 14819-2:2021
EN ISO 14819-2:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 14819-2:2021
EN ISO 14819-2:2021 (E)
European foreword

This document (EN ISO 14819-2:2021) 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 September 2021, and conflicting national standards

shall be withdrawn at the latest by September 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 14819-2:2013.

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, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 14819-2:2021 has been approved by CEN as EN ISO 14819-2:2021 without any

modification.
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SIST EN ISO 14819-2:2021
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SIST EN ISO 14819-2:2021
INTERNATIONAL ISO
STANDARD 14819-2
Third edition
2021-02
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
Systèmes de transport intelligents — Informations sur le trafic et les
déplacements via le codage de messages sur le trafic —
Partie 2: Codes d'évènements et d'informations pour le système de
radiodiffusion de données - canal de messages d'informations sur le
trafic (RDS-TMC) avec Alert-C
Reference number
ISO 14819-2:2021(E)
ISO 2021
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SIST EN ISO 14819-2:2021
ISO 14819-2:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

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 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
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SIST EN ISO 14819-2:2021
ISO 14819-2:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Event and Information codes for Traffic Message Channel ...................................................................................... 1

4.1 Event List...................................................................................................................................................................................................... 1

4.1.1 Explanatory notes ........................................................................................................................................................... 1

4.1.2 List of quantifiers ........................................................................................................................................................... 4

4.1.3 Event list ...................................................................... ............................................................................................................ 5

4.2 Supplementary information .....................................................................................................................................................48

4.2.1 Explanatory notes ........................................................................................................................................................48

4.2.2 Supplementary information list ......................................................................................................................49

4.3 Forecast event list ..............................................................................................................................................................................56

4.3.1 Explanatory notes ........................................................................................................................................................56

4.3.2 Forecast event list ........................................................................................................................................................56

Annex A (informative) GB-English with non-metric units - List of quantifiers ......................................................62

Annex B (informative) GB-English with non-metric units - Event List ...........................................................................64

Annex C (informative) GB-English - Supplementary information list .........................................................................106

Annex D (informative) GB-English - Forecast event list .............................................................................................................114

Bibliography .........................................................................................................................................................................................................................119

© ISO 2021 – All rights reserved iii
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SIST EN ISO 14819-2:2021
ISO 14819-2:2021(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 (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

constitute an endorsement.

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, in

collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/

TC 278, Intelligent transport systems, in accordance with the Agreement on technical cooperation

between ISO and CEN (Vienna Agreement).

This third edition cancels and replaces the second edition (ISO 14819-2:2013) which has been

technically revised. The main changes compared to the previous edition are as follows:

— in the Event List, the column “P” for ‘phased-out codes’ has been added;
— a small number of additional events have been added to the Event List;
— a small number of additional events have been added to the Supplementary List;
— wording has been improved for greater clarity;
— several minor typographical errors have been corrected.
A list of all parts in the ISO 14819 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.
iv © ISO 2021 – All rights reserved
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SIST EN ISO 14819-2:2021
ISO 14819-2:2021(E)
Introduction

This document is the second part of the ISO 14819 series of standards, covering the ‘ALERT-C’ protocol

which describes how traffic messages are coded for transmission as an ‘Open Data Application’ over the

Radio Data System (RDS), a sub-carrier on FM radio transmissions. A complete understanding of RDS-

TMC is only possible by reading this document (Part 2) together with the other parts of the ISO 14819

series of standards, which are:

— ISO 14819-1, which describes the ALERT-C protocol concept and relationship with the RDS standards,

IEC 62106 (all parts);

— ISO 14819-3, which describes ways in which position and places are coded using ALERT-C; and

— ISO 14819-6, which describes how messages may be optionally encrypted for conditional access.

This document contains the special meta-language which technical experts agreed would be the sole

source for all coded descriptions used in RDS-TMC. This methodology has allowed agreement over

important details for the many hundreds of event phrases so included, even though subtle linguistic

differences were perceived and allowed for in terms of end-user presentation.
© ISO 2021 – All rights reserved v
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SIST EN ISO 14819-2:2021
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SIST EN ISO 14819-2:2021
INTERNATIONAL STANDARD ISO 14819-2:2021(E)
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
1 Scope

ISO 14819-1 describes the ALERT-C protocol concept and message structure used to achieve densely

coded messages to be carried in the RDS-TMC feature. This document specifies the ‘Events List’ to be

used in coding those messages.
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 14819-1, 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

IEC 62106 (all parts), Specification of the Radio Data System (RDS) for VHF/FM sound broadcasting in the

frequency range from 64,0 to 108,0 MHz
3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Event and Information codes for Traffic Message Channel
4.1 Event List
4.1.1 Explanatory notes

a) The event list is divided into update classes, indicated by the various sections. These update classes

are used for terminal message management, as indicated in ISO 14819-1:2021, 6.1. The event list is

shown in the format of a database.

NOTE The first column of the Event list in 4.1.3 (Table 2) shows line numbers to assist reading and use

of the database.

b) The second column gives a ‘technical language’ (so-called CEN-English) description of the event

code, the code of which is shown in the third field. Appropriate authorities of each country have

been responsible for the exact descriptions in other languages, in conformity with the definitions

© ISO 2021 – All rights reserved 1
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SIST EN ISO 14819-2:2021
ISO 14819-2:2021(E)

given in the DATEX Data Dictionary. This document uses the English language and metric units by

default, but is essentially both language- and unit-independent, as presentation to the end-user’s

preference is made by the client device: the recommended conversions from metric to non-metric

(i.e. imperial) units are given in Annexes A, B, C and D.

This ensures precise definitions and use of the event codes in the transmission layer. Individual

terminal implementations may handle these (translated) descriptions with some flexibility in

order to allow a more effective presentation, but without altering the meaning.

c) The third column gives the decimal equivalent of the actual binary event code to be transmitted

(see ISO 14819-1:2021, 5.3.2). These codes are purely internal to the RDS-TMC system and should

not be used for referencing events or composing messages in other operator systems. Undefined

codes are reserved for future system additions.

d) The fourth column, "N", is the nature of the event. The general meaning of the codes is as follows:

(blank) - Information
F - Forecast
S - Silent: no message shall be presented to the end-user

e) The fifth column, "Q", is the quantifier field, containing the reference numbers of quantifiers listed

in the table at the end of the event list. The position of the quantifier in the event, plus in some

cases some accompanying words, is shown by (...Q...) within the text. Use of these quantifiers is

usually optional. However, a few event messages have no meaning without the quantifier. The use

of quantifiers is described in ISO 14819-1:2021, 5.5.6.

f) The sixth column, "T", is the duration type. "D" indicates "dynamic" events of short duration and "L"

indicates longer-lasting events (see ISO 14819-1:2021, 5.4.7). If this code is bracketed ( ), or if the

time-of-day quantifier (no.7) is actually used in the message, no duration shall be presented to the

user. In these cases, the duration indicates persistence, used for message management only.

g) The seventh column, "D", is the default directionality of the event. "1" indicates that one direction

of traffic is normally affected by the event. "2" indicates that both directions of traffic are normally

affected by the event. TMC terminals can use this field to help to determine which events to present

to the driver and how to present them.

h) The eighth column, "U", is the default terminal urgency, with values "X" for extremely urgent, "U"

for urgent, and blank for normal events (see ISO 14819-1:2021, 5.4.5).

i) The ninth column, "C", gives a numerical representation of the update class to which the event

belongs. Update classes 1…31 are listed in 4.1.3. Update classes 32…39 are exclusively for events of

the forecast nature "F" with duration type L or (L). These are in subclause 4.3.2. Other than events

of type S, these classes contain no other events.

j) The tenth column, “P”, if it contains a code, indicates an event that experience has shown can be

misinterpreted. As such, this event may be deprecated in due course. The code in this cell indicates

the code that should be used in preference, as it better represents the event.

k) The final column, "R", gives phrase codes (references) for use by TMC operators. An event may be

a single phrase event, or a combination of two or more phrases. Each phrase is allocated a phrase

code consisting of at least of a single code letter (A - Z) and a code number (1 - 999). Single phrase

events are indicated by a single code letter and a one or two digit number (e.g. A1 - A99); expected

events are indicated by the normal phrase code followed by "E" (e.g. A1E), and where a risk of

danger exists by a following "D" (e.g. G6D); events with quantifiers can have three digits (e.g. A101).

Longer lasting forecasts are indicated by the letter "F".

The Event List also contains several predefined combinations of single phrase events to make

better use of the available channel capacity. These combined events are indicated by the combined

codes of the constituent phrases (e.g. B11.C1).
2 © ISO 2021 – All rights reserved
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SIST EN ISO 14819-2:2021
ISO 14819-2:2021(E)

Note that although the event lists (Main, Forecast and Supplementary) together contain around

1,700 messages, as explained above, most are composed by combining two or more single phrase

messages, so in practice there are only a few hundred unique phrases that need to be stored by the

terminal, which when combined form the longer composite messages.

Note also that the phrases used in combined events are not always word for word identical to the

corresponding phrases used in the single events. Binding words or small changes to the wording

are sometimes necessary.

The code letters are not related to the update classes, but have the following meaning:

A: Level of Service
B: Incidents/Accidents
C: Closures
D: Lane Restrictions
E: Roadworks
F: Obstruction Hazards
G: Road Conditions
H: Weather
J: Winds
L: Environment
M: Temperature
P: Activities
Q: Delays/Cancellations
R: Dangerous Vehicles
S: Exceptional Loads
T: Traffic Equipment Status
U: Traffic Regulations
X: Parking
Y: Information
Z: Indicates phrases from the List of Supplementary Information (see 4.2.1).

The phrase codes are not normative, but are only given as additional information about the contents

of a given event and should be helpful when implementing software.

l) The Event List is comprehensive and contains many messages that may be rarely or even never used

by particular service providers. In general, each service provider will use a sub-set of the complete

list, according to their needs and the needs of the road network for which they are providing

information.

Although individual service providers may use only a sub-set of messages, terminal manufacturers

are encouraged to support all messages in the event list to ensure messages from any service

provider can be presented to the end-user.
© ISO 2021 – All rights reserved 3
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SIST EN ISO 14819-2:2021
ISO 14819-2:2021(E)
4.1.2 List of quantifiers
Table 1 — List of quantifiers
No Meaning Range Examples
Value Binary code
0 n (small number) ( n = 1 , 2 , . . . , 28 ; 1 00001
30, 32, ...36); 2 00010
36 00000
1 N (number) (N = 1, 2, 3, 4; 1 00001
2 00010
10, 20, ... 100; 10 00101
20 00110
150, 200, ... 1000) 150 01111
200 10000
1000 00000
2 less than V metres (V = 10, 20, ... 300) 10 00001
20 00010
300 11110
3 P percent (P = 0, 5, ... 100) 0 00001
5 00010
100 10101
4 of up to S km/h (S = 5, 10, ... 160) 5 00001
10 00010
160 00000
5 of up to M minutes (M = 5, 10, ... 50; 5 00001
10 00010
or H hours H = 1, 2, ... 12; 1 01011
2 01100
18, 24, ... 72) 18 10111
24 11000
72 00000
6 T degrees Celsius (T = -50, -49, ... +50) -50 0000 0001
-49 0000 0010
+50 0110 0101
7 H time-of-day (H = 00.00, 00.10, ... 23.50) 00.00 0000 0001
00.10 0000 0010
23.50 1000 1111
8 W tonnes (W = 0.1, 0.2, ... 10.0; 0.1 0000 0001
0.2 0000 0010
10.5, 11.0, ... 60.0) 10.5 0110 0101
11.0 0110 0110
60.0 1100 1000
9 L metres (L = 0.1, 0.2, ... 10.0; 0.1 0000 0001
0.2 0000 0010
10.5, 11.0, ... 80.0) 10.5 0110 0101
11.0 0110 0110
80.0 1111 0000
10 of up to D millimetres (D = 1, 2, ... 255) 1 0000 0001
2 0000 0010
255 1111 1111
11 M MHz (as defined in ISO 14819-1, IEC 87.6 0000 0001
62106 [all parts]) 87.7 0000 0010
107.9 1100 1100
4 © ISO 2021 – All rights reserved
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SIST EN ISO 14819-2:2021
ISO 14819-2:2021(E)
Table 1 (continued)
No Meaning Range Examples
Value Binary code
12 k kHz (as defined in ISO 14819-1, IEC ITU Regions
62106 [all parts]) 1 & 3
153 0000 0001
162 0000 0010
279 0000 1111
531 0001 0000
540 0001 0001
1602 1000 0111
ITU Region 2
530 0001 0000
540 0001 0001
1610 0111 1100
Quantifiers 0…5 use a 5-bit data field.

The first value uses binary code 00001 and the second value uses 00010. The values increment

according to the steps shown. Where binary code 11111 has been reached the final (highest) value uses

code 00000.
Quantifiers 6…12 use an 8-bit data field.

The first value uses binary code 0000 0001 and the second value uses 0000 0010. The values increment

according to the steps shown.
4.1.3 Event list
NOTE The first column shows line numbers to assist reading of the database.
Table 2 — Event list
Line Text (metric units) Code N Q T D U C P R
1 EVENT LIST
3 1. LEVEL OF SERVICE
5 traffic problem 1 D 1 U 1 A50
6 stationary traffic 101 D 1 U 1 A1
7 stationary traffic for 1 km 102 D 1 U 1 A101
8 stationary traffic for 2 km 103 D 1 U 1 A102
9 stationary traffic for 3 km 129 D 1 U 1 A103
10 stationary traffic for 4 km 104 D 1 U 1 A104
11 stationary traffic for 6 km 105 D 1 U 1 A106
12 stationary traffic for 10 km 106 D 1 U 1 A110
13 risk of stationary traffic 130 D 1 U 1 A1D
14 queuing traffic (with average speeds Q) 108 4 D 1 U 1 A2
queuing traffic for 1 km (with average 109 4 D 1 U 1 A201
15 speeds Q)
queuing traffic for 2 km (with average 110 4 D 1 U 1 A202
16 speeds Q)
© ISO 2021 – All rights reserved 5
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SIST EN ISO 14819-2:2021
ISO 14819-2:2021(E)
Table 2 (continued)
Line Text (metric units) Code N Q T D U C P R
queuing traffic for 3 km (with average 131 4 D 1 U 1 A203
17 speeds Q)
queuing traffic for 4 km (with average 111 4 D 1 U 1 A204
18 speeds Q)
queuing traffic for 6 km (with average 112 4 D 1 U 1 A206
19 speeds Q)
queuing traffic for 10 km (with average 113 4 D 1 U 1 A210
20 speeds Q)
21 risk of queuing traffic (with average speeds Q) 132 4 D 1 U 1 A2D
22 long queues (with average speeds Q) 133 4 D 1 U 1 A7
23 slow traffic (with average speeds Q) 115 4 D 1 U 1 A3
24 slow traffic for 1 km (with average speeds Q) 116 4 D 1 U 1 A301
25 slow traffic for 2 km (with average speeds Q) 117 4 D 1 U 1 A302
26 slow traffic for 3 km (with average speeds Q) 134 4 D 1 U 1 A303
27 slow traffic for 4 km (with average speeds Q) 118 4 D 1 U 1 A304
28 slow traffic for 6 km (with average speeds Q) 119 4 D 1 U 1 A306
29 slow traffic for 10 km (with average speeds Q) 120 4 D 1 U 1 A310
30 heavy traffic (with average speeds Q) 122 4 D 1 1 A4
traffic heavier than normal (with average 142 4 D 1 1 A11
31 speeds Q)
traffic very much heavier than normal (with 143 4 D 1 1 A12
32 average speeds Q)
33 traffic flowing freely (with average speeds Q) 124 4 (D) 1 1 A5
34 traffic building up (with average speeds Q) 125 4 D 1 1 A6
35 traffic easing 135 (D) 1 1 A8
36 traffic congestion (with average speeds Q) 136 4 D 1 1 A9
37 traffic congestion, average speed of 10 km/h 70 D 1 U 1 A910
38 traffic congestion, average speed of 20 km/h 71 D 1 U 1 A920
39 traffic congestion, average speed of 30 km/h 72 D 1 U 1 A930
40 traffic congestion, average speed of 40 km/h 73 D 1 U 1 A940
41 traffic congestion, average speed of 50 km/h 74 D 1 1 A950
42 traffic congestion, average speed of 60 km/h 75 D 1 1 A960
43 traffic congestion, average speed of 70 km/h 76 D 1 1 A970
44 traffic congestion, average speed of 80 km/h 77 D 1 1 A980
45 traffic congestion, average speed of 90 km/h 78 D 1 1 A990
46 traffic congestion, average speed of 100 km/h 79 D 1 1 A9100
traffi
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