Alcohol interlocks - Test methods and performance requirements - Part 3: Guidance for authorities, decision makers, purchasers and users

An alcohol interlock is a system comprising a breath alcohol measuring instrument and an immobiliser which may be easily installed in motor vehicles as passenger cars, coaches, taxis, hazardous goods transporters, lorries, trams, trains, motorcycles, boats, or snow mobiles. Before the vehicle motor can be started or the vehicle can be moved, a breath sample needs to be provided to the alcohol interlock, normally through a mouthpiece. Once the breath alcohol measurement has been performed, the alcohol interlock will prevent drivers from starting the motor if they have an alcohol concentration above a predetermined limit value. This limit may be set at the legal limit of a respective country or lower. Alcohol interlocks that meet the relevant European Standards detect, for example, if the sample is delivered by a human being. They are also capable of preventing and detecting tampering with the instrument. Additional parts of the system may include identity checking or recording mechanisms. The purpose of this European Standard is to give practical guidance for selection, installation, use and maintenance of alcohol interlocks. It is directed to all those who have an interest in alcohol interlocks as well as companies selling and installing alcohol interlocks, purchasers and users for commercial, professional or private use. The European Standard gives information about the alcohol interlock and how it is to be used. This European Standard describes alcohol interlocks for use in vehicles as a general preventive measure in traffic safety as well as for use in drink driving offender programmes. However, information provided may also be useful for alcohol interlocks in other applications.

Alkohol-Interlocks - Prüfverfahren und Anforderungen an das Betriebsverhalten - Teil 3: Leitfaden für Behörden, Entscheider, Käufer und Nutzer

Ein Alkohol Interlock ist ein aus einem Atemalkoholmessgerät und einer Wegfahrsperre bestehendes System, das sich ohne Schwierigkeiten in Motorfahrzeuge wie Personenkraftwagen, Busse, Taxis, Gefahrguttransporter, Lastwagen Straßenbahnen, Züge, Motorräder, Boote oder Schneemobile einbauen lässt. Bevor der Fahrzeugmotor gestartet oder das Fahrzeug bewegt werden kann, muss eine Atemprobe in das Alkohol Interlock abgegeben werden, was normalerweise durch ein Mundstück erfolgt. Sobald die Atemalkoholmessung erfolgt ist, hindert das Alkohol Interlock Fahrer am Starten des Motors, wenn ihre Alkoholkonzentration über einem vorher festgelegten Grenzwert liegt. Dieser Grenzwert kann auf den gesetzlich festgelegten Grenzwert eines jeweiligen Landes oder darunter eingestellt werden. Alkohol Interlocks, die die zutreffenden Europäischen Normen erfüllen, erkennen z. B., ob die Probe von einem Menschen abgegeben wurde. Sie sind auch in der Lage, Manipulationen am Gerät zu verhindern und zu erkennen. Zusatzteile des Systems können Einrichtungen zur Identitätsüberprüfung oder Aufzeichnungsvorrichtungen enthalten. Zweck dieser europäischen Norm ist es, eine praktische Anleitung zu Auswahl, Einbau, Einsatz und Wartung von Alkohol Interlocks zu geben. Sie richtet sich an all jene, die an Alkohol Interlocks interessiert sind, an Firmen, die Alkohol Interlocks vertreiben und einbauen, sowie an Käufer und Nutzer beim gewerblichen, beruflichen als auch privaten Einsatz. Die europäische Norm liefert Informationen zum Alkohol Interlock und wie dieses Gerät anzuwenden ist. Diese europäische Norm beschreibt Alkohol Interlocks zur Nutzung in Fahrzeugen als allgemein präventive Maßnahme für die Verkehrssicherheit sowie zur Nutzung in Programmen für Trunkenheitsfahrer. Die gegebenen Informationen können jedoch auch für Alkohol Interlocks in anderen Anwendungen von Nutzen sein.

Ethylotests antidémarrage - Méthodes d'essais et exigences de performance - Partie 3 : Document d'orientation pour les autorités, les décideurs, les acheteurs et les utilisateurs

Un éthylotest antidémarrage est un système composé d'un appareil mesurant le taux d'alcoolémie de l'air expiré et d'un dispositif d'immobilisation qui peut être facilement installé dans les véhicules à moteur comme les véhicules de tourisme, les autocars, les taxis, les véhicules de transport de marchandises dangereuses, les camions, les tramways, les trains, les motos, les bateaux ou les motoneiges. Avant de pouvoir démarrer le moteur du véhicule ou de pouvoir déplacer le véhicule, un échantillon d'air expiré par le conducteur doit être fourni à l'éthylotest antidémarrage, en utilisant en règle générale un embout. Lorsque la mesure du taux d'alcoolémie de l'air expiré a été réalisée, l'éthylotest antidémarrage empêche les conducteurs de démarrer le moteur si leur concentration d'alcool est supérieure à une valeur limite prédéterminée. Cette limite peut être fixée à une valeur inférieure ou égale à la limite légale d'un pays donné. Par exemple, les éthylotests antidémarrage qui satisfont aux Normes européennes applicables détectent si l'échantillon est fourni par un être humain. Ils peuvent également empêcher et détecter l'altération de l'appareil. Des parties supplémentaires du système peuvent intégrer la vérification d'identité ou des mécanismes d'enregistrement. La présente Norme européenne a pour objet de donner des préconisations pratiques pour le choix, l'installation, l'usage et la maintenance des éthylotests antidémarrage. Elle est destinée à toutes les parties intéressées par les éthylotests antidémarrage comme aux sociétés qui vendent et installent ces produits, aux acheteurs et aux utilisateurs pour un usage commercial, professionnel ou privé. La présente Norme européenne donne des informations sur les éthylotests antidémarrage et sur la manière dont ils doivent être utilisés. La présente Norme européenne décrit les éthylotests antidémarrage destinés aux véhicules comme mesure de prévention générale de sécurité routière ainsi que ceux destinés aux programmes de lutte contre la conduite en état d'ivresse. Toutefois, les informations fournies peuvent également être utiles pour les éthylotests antidémarrage destinés à d'autres applications.

Alkoholne zapore - Preskusne metode in zahtevane lastnosti - 3. del: Navodilo za upravne organe, nosilce odločanja, kupce in uporabnike

Alkoholna zapora je sistem, ki je sestavljen iz instrumenta za merjenje alkohola v sapi in imobilizatorja, ki se lahko zlahka namesti v motorna vozila, kot so osebna vozila, avtobusi, taksiji, transporterji za nevarno blago, tovornjaki, tramvaji, vlaki, motorna kolesa, čolni ali snežne sani. Preden je motor vozila mogoče zagnati ali je vozilo mogoče premakniti, je treba v alkoholno zaporo vpihniti vzorec sape, in sicer običajno skozi ustnik. Ko je izvedena meritev alkohola v sapi, alkoholna zapora prepreči voznikom zagon motorja, če je koncentracija alkohola nad vnaprej določeno mejno vrednostjo. To omejitev se lahko nastavi na zakonsko določeno omejitev v zadevni državi ali nižje.
Alkoholne zapore, ki izpolnjujejo zahteve ustreznih evropskih standardov, zaznajo, ali je npr. vzorec vnesel človek. Poleg tega lahko zaznajo in preprečijo poseganje v instrument.
Dodatni deli sistema lahko zajemajo mehanizme za preverjanje identitete ali beleženje dejavnosti.
Namen tega evropskega standarda je ponuditi praktične smernice za izbiro, namestitev, uporabo in vzdrževanje alkoholnih zapor. Namenjen je vsem, ki jih zanimajo alkoholne zapore, podjetjem, ki prodajajo ter nameščajo alkoholne zapore, kupcem in uporabnikom za komercialno, profesionalno ali zasebno uporabo. Ta evropski standard podaja informacije o alkoholnih zaporah in njihovi uporabi.
Ta evropski standard opisuje alkoholne zapore za uporabo v vozilih kot splošni preventivni ukrep za varnost v prometu in za uporabo v programih za prevzgojo voznikov, ki so vozili pod vplivom alkohola. Vendar te informacije so lahko uporabne tudi pri drugih načinih uporabe alkoholnih zapor.

General Information

Status
Published
Publication Date
22-Dec-2016
Current Stage
6060 - Document made available
Due Date
17-Jan-2017

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SLOVENSKI STANDARD
SIST EN 50436-3:2017
01-februar-2017
1DGRPHãþD
SIST-TP CLC/TR 50436-3:2011
$ONRKROQH]DSRUH3UHVNXVQHPHWRGHLQ]DKWHYDQHODVWQRVWLGHO1DYRGLOR]D
XSUDYQHRUJDQHQRVLOFHRGORþDQMDNXSFHLQXSRUDEQLNH

Alcohol interlocks - Test methods and performance requirements - Part 3: Guidance for

authorities, decision makers, purchasers and users

Alkohol-Interlocks - Prüfverfahren und Anforderungen an das Betriebsverhalten Teil 3:

Leitfaden für Behörden, Entscheider, Käufer und Nutzer
Alcootests électroniques anti-démarrage - Méthodes d'essai et exigences de

performance - Partie 3: Lignes directrices pour décideurs, acheteurs et utilisateurs

Ta slovenski standard je istoveten z: EN 50436-3:2016
ICS:
13.200 3UHSUHþHYDQMHQHVUHþLQ Accident and disaster control
NDWDVWURI
43.040.80 6LVWHPL]D]DãþLWRSULWUNXLQ Crash protection and
VLVWHPL]D]DGUåHYDQMH restraint systems
SRWQLNRY
SIST EN 50436-3:2017 en

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

---------------------- Page: 1 ----------------------
SIST EN 50436-3:2017
---------------------- Page: 2 ----------------------
SIST EN 50436-3:2017
EUROPEAN STANDARD
EN 50436-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2016
ICS 71.040.40; 43.040.10 Supersedes CLC/TR 50436-3:2010
English Version
Alcohol interlocks - Test methods and performance
requirements - Part 3: Guidance for authorities, decision
makers, purchasers and users

thylotests antidémarrage - Méthodes d'essais et Alkohol-Interlocks - Prüfverfahren und Anforderungen an

exigences de performance - Partie 3 : Document das Betriebsverhalten - Teil 3: Leitfaden für Behörden,

d'orientation pour les autorités, les décideurs, les Entscheider, Käufer und Nutzer

acheteurs et les utilisateurs

This European Standard was approved by CENELEC on 2016-10-31. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50436-3:2016 E
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SIST EN 50436-3:2017
EN 50436-3:2016 (E)
Contents Page

European foreword ................................................................................................................................. 5

Introduction ............................................................................................................................................. 6

1 Scope ............................................................................................................................................. 7

2 Normative references ................................................................................................................... 7

3 Terms and definitions .................................................................................................................. 8

4 Application of alcohol interlocks as a road safety measure .................................................. 10

4.1 General ............................................................................................................................ 10

4.2 Primary preventive application ..................................................................................... 10

4.3 Secondary preventive application ................................................................................ 11

5 Application of alcohol interlocks for automatic access control ............................................ 11

6 Introduction of alcohol interlocks for commercial and professional use ............................ 12

6.1 Alcohol interlocks, a way to ensure quality ................................................................ 12

6.2 International Standard ISO 39001 ................................................................................. 12

6.3 Systematic procedures to introduce alcohol interlocks ............................................ 12

6.4 Dialogue with unions or other representatives .......................................................... 13

6.5 Dealing with alcohol problems ..................................................................................... 14

7 Alcohol interlocks in drink driving offender programmes ..................................................... 14

7.1 Overview ......................................................................................................................... 14

7.2 Participation rate ............................................................................................................ 15

8 Criteria for selection .................................................................................................................. 15

8.1 Approvals and performance testing ............................................................................ 15

8.1.1 EMC legislation ......................................................................................................................... 15

8.1.2 Performance standards ........................................................................................................... 16

8.2 Breath alcohol measurement techniques .................................................................... 17

8.2.1 General ...................................................................................................................................... 17

8.2.2 Electrochemical sensors ......................................................................................................... 17

8.2.3 Semiconductor sensors .......................................................................................................... 18

8.2.4 Optical sensors ........................................................................................................................ 18

8.3 Quality demands and choice of products ................................................................... 18

8.4 Parameter settings ......................................................................................................... 20

8.4.1 Alcohol concentration limit ..................................................................................................... 20

8.4.2 Other parameters ..................................................................................................................... 20

8.5 Circumvention, manipulation and tampering ............................................................. 21

8.6 Data memory, download and analysis ......................................................................... 22

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SIST EN 50436-3:2017
EN 50436-3:2016 (E)

9 Installation in vehicles ............................................................................................................... 22

9.1 General ............................................................................................................................ 22

9.2 Instructions for installation ........................................................................................... 22

9.3 Criteria for placement .................................................................................................... 23

10 Use ............................................................................................................................................... 24

10.1 Education and information for the user....................................................................... 24

10.2 Instructions for use ....................................................................................................... 25

10.3 Environmental conditions ............................................................................................. 26

10.4 Override function ........................................................................................................... 26

10.4.1 Override function for emergency situations ......................................................................... 26

10.4.2 Override function for technical service ................................................................................. 26

10.5 Retest function ............................................................................................................... 26

10.6 Change driver function .................................................................................................. 27

10.7 Effects of mouth alcohol and environmental contamination .................................... 27

10.8 Interfering substances .................................................................................................. 28

11 Maintenance ................................................................................................................................ 28

11.1 Training ........................................................................................................................... 28

11.2 Periodic inspection, functional tests and calibration ................................................ 28

11.3 Instructions for service ................................................................................................. 28

12 Removal ...................................................................................................................................... 29

13 Conclusion .................................................................................................................................. 29

Annex A (informative) Questions and answers ................................................................................ 30

A.1 What is an alcohol interlock ? ................................................................................................... 30

A.2 Where are alcohol interlocks used ? ........................................................................................ 30

A.3 Is it difficult to install an alcohol interlock ? ........................................................................... 30

A.4 Is it possible to install an alcohol interlock in motorcycles ? ............................................... 30

A.5 Can an alcohol interlock be circumvented ? ........................................................................... 30

A.6 Can a sober person blow into the alcohol interlock to allow an impaired person to

drive ? .......................................................................................................................................... 30

A.7 Do alcohol interlocks detect tampering or attempts to bypass them ?................................ 31

A.8 Can any person use a car with an alcohol interlock ? ........................................................... 31

A.9 Is it necessary to deliver a breath test after a short stop ? ................................................... 31

A.10 What is a retest ? ........................................................................................................................ 31

A.11 Is it dangerous to deliver a retest during driving ? ................................................................ 31

A.12 Should an alcohol interlock be calibrated regularly ? ............................................................ 31

A.13 What happens if the alcohol interlock is defective ? Can the motor then be started ? ...... 31

A.14 What happens if the alcohol interlock becomes defective while the motor is

running ? ..................................................................................................................................... 32

A.15 Can a sober person have a positive test result ? ................................................................... 32

A.16 How long does it take until residual mouth alcohol disappears ? ........................................ 32

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SIST EN 50436-3:2017
EN 50436-3:2016 (E)

A.17 What happens if a person has taken medicines containing alcohol ? ................................. 33

A.18 How effective are alcohol interlocks in preventing (repeat) drink driving ? ........................ 33

A.19 Can alcohol dependent drivers benefit from alcohol interlocks ? ........................................ 33

A.20 Are there further beneficial effects apart from road safety ? ................................................. 33

Annex B (informative) Items to be considered when selecting an alcohol interlock ................... 34

Annex C (informative) Description of basic parameter settings..................................................... 35

Annex D (informative) Basic steps of a drink-driving-offender programme ................................. 39

Bibliography .......................................................................................................................................... 44

Tables

Table C.1 – Summary of typical parameter settings of alcohol interlocks ..................................... 35

Table D.1 – Summary of typical steps of drink-driving-offender programme ................................ 39

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SIST EN 50436-3:2017
EN 50436-3:2016 (E)
European foreword

This document (EN 50436-3:2016) has been prepared by CLC/BTTF 116-2 “Alcohol interlocks”.

The following dates are fixed:
• latest date by which this document (dop) [2017-10-31]
has to be implemented
at national level by publication of an identical
national standard or by endorsement
• latest date by which the national standards (dow) [2019-10-31]
conflicting with this document
have to be withdrawn
This document supersedes CLC/TR 50436-3:2010.

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

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

EN 50436-3:2016 includes the following significant technical changes with respect to

CLC/TR 50436-3:2010:

– Clause 3: definitions are added for primary prevention and secondary prevention.

– Clause 4: this clause has been revised including primary prevention and secondary prevention.

– Clause 5: the former content for automatic access control is now in a separate clause.

– Subclause 6.2: the chapter on International Standard ISO 39001 is added.

– Clause 7: the chapter on alcohol interlocks in drink driving offender programmes is added.

– Subclause 8.1: the text is updated with respect to the current legislation.
– Informative Annex C with a description of basic parameter settings is added.

– Informative Annex D with a description of basic steps of a drink driving offender programme is

added.
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SIST EN 50436-3:2017
EN 50436-3:2016 (E)
Introduction

According to the European Transport Safety Council (ETSC), in about a quarter of the fatal accidents

that occur in traffic on European roads, alcohol impairment has been a contributory factor. Drink-

driving is found in all social classes and professional categories, often without their families, friends,

colleagues or supervisors knowing about it. In those cases where there actually is an awareness, it is

often difficult to know how to act or confront the problem. A strategy has been drawn up within the

European Commission to decrease alcohol related injuries as well as to support countries that are

working in different ways to tackle the problem of drink-driving.

One strategy to decrease alcohol-related accidents is to implement the use of alcohol interlocks. The

main purpose of alcohol interlocks is to prevent persons with breath alcohol concentrations exceeding

a set limit value from driving a vehicle.

The use of alcohol interlocks in the vehicles of drink-driving offenders was started in the USA in 1985

and followed a few years later in Canada. From the end of the 1990s, the use of alcohol interlocks has

spread worldwide, especially in Australia and several European countries. In Sweden, offender

programmes started in 1999, followed closely by the use of alcohol interlocks for quality assurance of

transportation. Further examples for the implementation of alcohol interlocks saving human lives every

year in Europe are Finland, France and the Netherlands. A continuously updated overview is published

by ETSC (www.etsc.eu).
There are several areas in which alcohol interlocks may be used:

– installed in a vehicle as a general preventive measure for the promotion of traffic safety; or

– in vehicles as ordered by a court or an administrative authority as part of a drink-driving offender

programme; or
– for persons subject to a medical or rehabilitation programme; or
– as a safety measure for the access to machinery or certain restricted areas.

This guidance for authorities, governments, political decision makers, transport companies,

purchasers, unions and users contains numerous recommendations for those interested in the use of

alcohol interlocks. However, it is not mandatory and it does not contain any requirements.

This European Standard is part of a series of European Standards which mainly describe test methods

and requirements for alcohol interlocks. It is assumed that the recommendations given in this

document are used for alcohol interlocks fulfilling the requirements of one or more of the performance

standards of this series.
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SIST EN 50436-3:2017
EN 50436-3:2016 (E)
1 Scope

An alcohol interlock is a system comprising a breath alcohol measuring instrument and an immobiliser

which may be easily installed in motor vehicles as passenger cars, coaches, taxis, hazardous goods

transporters, lorries, trams, trains, motorcycles, boats, or snow mobiles. Before the vehicle motor can

be started or the vehicle can be moved, a breath sample needs to be provided to the alcohol interlock,

normally through a mouthpiece. Once the breath alcohol measurement has been performed, the

alcohol interlock will prevent drivers from starting the motor if they have an alcohol concentration above

a predetermined limit value. This limit may be set at the legal limit of a respective country or lower.

Alcohol interlocks that meet the relevant European Standards detect, for example, if the sample is

delivered by a human being. They are also capable of preventing and detecting tampering with the

instrument.

Additional parts of the system may include identity checking or recording mechanisms.

The purpose of this European Standard is to give practical guidance for selection, installation, use and

maintenance of alcohol interlocks. It is directed to all those who have an interest in alcohol interlocks

as well as companies selling and installing alcohol interlocks, purchasers and users for commercial,

professional or private use. The European Standard gives information about the alcohol interlock and

how it is to be used.

This European Standard describes alcohol interlocks for use in vehicles as a general preventive

measure in traffic safety as well as for use in drink driving offender programmes. However, information

provided may also be useful for alcohol interlocks in other applications.
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.

EN 50436-1:2014, Alcohol interlocks - Test methods and performance requirements - Part 1:

Instruments for drink-driving-offender programs

EN 50436-2:2014, Alcohol interlocks - Test methods and performance requirements - Part 2:

Instruments having a mouthpiece and measuring breath alcohol for general preventive use

EN 50436-6:2015, Alcohol interlocks - Test methods and performance requirements - Part 6: Data

security

NOTE The technology of alcohol interlocks is rapidly evolving, and further innovations can be expected,

which could be considered in future amendments or new parts of these European Standards.

ISO 39001:2012, Road traffic safety (RTS) management systems - Requirements with guidance for

use
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SIST EN 50436-3:2017
EN 50436-3:2016 (E)
3 Terms and definitions

For the purposes of this document, the following terms and definitions, given in EN 50436-1:2014,

apply.
3.1
alcohol interlock

device which is normally in the blocking state when installed to prevent the starting of the vehicle

motor, and which can be brought into the not-blocking state only after the presentation and analysis of

a breath sample with an alcohol concentration below a limit value

Note 1 to entry: It normally consists of a handset and a control unit electrically connected to the vehicle.

Note 2 to entry: In this European Standard the expression “starting of the vehicle motor” includes provision of an

output signal from the alcohol interlock to the vehicle to enable the starting, operation or movement of the

vehicle.
3.2
Breath Alcohol Concentration
BrAC

mass concentration of ethanol, expressed in mg/l (milligram ethanol per litre breath air), in a breath

sample delivered into an alcohol interlock
3.3
breath sample
breath air sample taken under forced expiration
3.4
accepted breath sample

breath sample fulfilling set requirements for volume, flow, exhalation time and other human breath

sample characteristics

NOTE 1 to entry: The acceptance of a breath sample is independent from the alcohol concentration.

3.5
breath test
providing a breath sample to an alcohol interlock
3.6
mouthpiece
part through which the breath sample is delivered into the alcohol interlock
3.7
blocking state
state in which the alcohol interlock inhibits the starting of the vehicle motor
3.8
not-blocking state
state in which the vehicle motor can be started
3.9
breath alcohol concentration limit

set value of the breath alcohol concentration at or above which the vehicle motor will be prevented

from being started
3.10
initial test
breath test provided before the vehicle motor is started
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SIST EN 50436-3:2017
EN 50436-3:2016 (E)
3.11
retest
breath test provided after the vehicle motor has started

NOTE 1 to entry: The retest function is a measure to assist in the detection of circumvention.

3.12
start period

time interval after an accepted breath sample with an alcohol concentration below the breath alcohol

concentration limit has been delivered, during which the vehicle motor may be started

3.13
restart period

time interval after the ignition is switched off during which the vehicle motor may be started again

without the delivery of another breath sample

NOTE 1 to entry: This restart period is intended to ensure the drivers ability to restart the vehicle motor after a

stall situation.
3.14
override

method of allowing the start of the vehicle motor without providing a breath sample

NOTE 1 to entry: The override function is for use in exceptional circumstances only, for example in case of a

device malfunction.
3.15
bypass

starting the vehicle motor without providing a breath sample or without engaging the override function

3.16
tampering

unauthorised change to or interference with the alcohol interlock or its installation in the vehicle or its

functioning
3.17
violation

act of doing something that is not allowed by the rules of a drink-driving-offender programme

3.18
data memory

record of breath test results and other events with date and time stored in the internal memory of the

alcohol interlock
3.19
supply voltage

voltage obtained from the electric power source of the vehicle for operation of the alcohol interlock

3.20
calibration interval

time period between calibrations during which the alcohol interlock fulfils the stability requirements for

the measurement of the breath alcohol concentration
3.21
manufacturer

person or organisation responsible for the design, construction and/or production of the alcohol

interlock
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SIST EN 50436-3:2017
EN 50436-3:2016 (E)
3.22
warm-up time

duration from power-up of the alcohol interlock until it is ready to accept a breath sample and to fulfil

the functional test requirements
3.23
primary prevention

prevention of a driver with no current alcohol related driving licence restriction from starting the vehicle

motor while under the influence of alcohol
3.24
secondary prevention

prevention of a driver with a current alcohol related driving licence restriction from starting the vehicle

motor while under the influence of alcohol
4 Application of alcohol interlocks as a road safety measure
4.1 General

To date, alcohol interlocks have been applied predominantly in the framework of road safety policies, in

the beginning exclusively aimed at the secondary prevention of drink-driving among arrested offenders.

In recent years, however, especially in Europe, the primary prevention among commercial,

professional and even private drivers has become more and more important.
4.2 Primary preventive application
Commercial and professional use

Installing an alcohol interlock as a general preventive measure in vehicles for the safe transport of

persons or goods such as hazardous goods transporters, lorries, coaches, taxis, trams, trains,

motorcycles, boats, snow mobiles or other modes of transportation can reduce accidents and related

downtime. An installation can also improve the image of the transport company by increasing road

safety, and improve their customers perception of their own safety. Alcohol interlocks may be used as

a transport quality instrument for vehicles operated by companies or authorities. They may also be a

requirement of employment within an alcohol policy of a company or authority, where they may be used

for compliance monitoring.

Several countries have required legally to install alcohol interlocks in certain vehicles (e.g. buses) as a

primary preventive application.
Private use by the general driving population

The control of drink-driving behaviour through alcohol interlocks may also be proposed for private use

on a personal voluntary decision basis. In private vehicles, boats, snow mobiles or recreational

vehicles the voluntary installation of an alcohol interlock as a preventive measure can help to ensure

that vehicle drivers are sober. Furthermore, they can offer reassurance to partners or for example to

parents whose children may also drive a vehicle. Interlocks may also be applicable with regard to self-

control for families who wish to avoid drink driving under any circumstances, or to insurance

companies which may allow a reduced insurance premium for drivers, especially young drivers or

drivers with a personal history of alcohol problems.

The self-evaluation of alcohol levels is considered as a major factor in the prevention of alcohol related

accidents. If alcohol interlocks are installed in private vehicles, then this will provide an additional

means for self-evaluation.
Private use as part of addiction treatment

In European countries, the number of problem drinkers who voluntarily enter addiction care and have a

valid driver's license, is much larger than the number of drink-driving offenders who are eligible to enter

a mandatory alcohol interlock programme. These persons are probably higher motivated to use an

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SIST EN 50436-3:2017
EN 50436-3:2016 (E)

alcohol interlock than arrested offenders. Furthermore, the alcohol interlock may be helpful in the

process of rehabilitation, both as a diagnostic instrument and as a remedial tool. The type of

programme for this category of high-risk drivers shall be more or less similar to an offender

programme. This means that the costs will be relatively high compared to the cost of a primary

prevention programme which does not need close monitoring. But the cost-benefit rate may be even

better than the one associated with offender programmes.
4.3 Secondary preventive application

The secondary preventive application of alcohol interlocks always has a more or less mandatory

character. Participation in an alcohol interlock programme is ordered by the court or by an

administrative body. Targe
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