Regulation No. 89-00

Name:Regulation No. 89-00
Description:Speed Limiters.
Official Title:Uniform Provisions Concerning the Approval of: I. Vehicles with Regard to Limitation of their Maximum Speed or their Adjustable Speed Limitation Function; II. Vehicles with Regard to the Installation of a Speed Limiting Device (SLD) or Adjustable Speed Limitation Device (ASLD) of an Approved Type; III. Speed Limitation Devices (SLD) and Adjustable Speed Limitation Device (ASLD).
Country:ECE - United Nations
Date of Issue:1993-03-31
Amendment Level:00 Series, Supplement 2
Number of Pages:39
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck
Subject Categories:Miscellaneous
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Keywords:

speed, approval, vehicle, regulation, type, sld, limitation, test, approved, production, tests, device, set, paragraph, requirements, granted, function, annex, vehicles, number, asld, service, technical, authority, adjustable, means, maximum, engine, control, part, agreement, communication, form, manufacturer, extension, time, conformity, competent, driver, regard, pursuant, submitted, mark, parties, range, discontinued, system, conducting, ensure, installation

Text Extract:

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E/ECE/324 )
E/ECE/TRANS/505 ) Rev.1/Add.88/Amend.2
February 24, 2011
STATUS OF UNITED NATIONS REGULATION
ECE 89-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
I. VEHICLES WITH REGARD TO LIMITATION OF THEIR MAXIMUM SPEED OR THEIR
ADJUSTABLE SPEED LIMITATION FUNCTION
II.
III.
VEHICLES WITH REGARD TO THE INSTALLATION OF A SPEED LIMITING DEVICE
(SLD) OR ADJUSTABLE SPEED LIMITATION DEVICE (ASLD) OF AN APPROVED
TYPE
SPEED LIMITATION DEVICES (SLD) AND ADJUSTABLE SPEED LIMITATION
DEVICE (ASLD)
Incorporating:
00 series of amendments
Date of Entry into Force: 01.10.92
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 12.08.02
Corr. 1 to the 00 series of amendments
Dated: 08.04.08
Supplement 2 to the 00 series of amendments
Date of Entry into Force: 30.01.11

REGULATION NO. 89
UNIFORM PRESCRIPTIONS FOR APPROVAL OF:
I. VEHICLES WITH REGARD TO LIMITATION OF THEIR MAXIMUM SPEED OR THEIR
ADJUSTABLE SPEED LIMITATION FUNCTION
II.
VEHICLES WITH REGARD TO THE INSTALLATION OF A SPEED LIMITING DEVICE (SLD)
OR ADJUSTABLE SPEED LIMITATION DEVICE (ASLD) OF AN APPROVED TYPE
III.SPEED LIMITATION DEVICES (SLD) AND ADJUSTABLE SPEED LIMITATION DEVICE (ASLD)
REGULATION
1.
Scope
2.
Definitions
CONTENTS
Part I:
Approval of vehicles with regard to limitation of their maximum speed
3.
Application for approval
4.
Approval
5.
Requirements
6.
Modifications of vehicle type and extension of approval
7.
Conformity of production
8.
Penalties for non-conformity of production
9.
Production definitely discontinued
10.
Names and addresses of technical services responsible for conducting approval tests and of
administrative departments .
Part II:
Approval of vehicles with regard to the installation of a speed limitation device (SLD)
of an approved type
11.
Application for approval
12.
Approval
13.
Requirements for installation of an approved SLD
14.
Modifications of vehicle type and extension of approval
15.
Conformity of production
16.
Penalties for non-conformity of production
17.
Production definitely discontinued
18.
Names and addresses of technical services responsible for conducting approval tests and of
administrative departments

REGULATION NO. 89
UNIFORM PRESCRIPTIONS FOR APPROVAL OF:
I. VEHICLES WITH REGARD TO LIMITATION OF THEIR MAXIMUM SPEED OR THEIR
ADJUSTABLE SPEED LIMITATION FUNCTION
II.
VEHICLES WITH REGARD TO THE INSTALLATION OF A SPEED LIMITING DEVICE (SLD)
OR ADJUSTABLE SPEED LIMITATION DEVICE (ASLD) OF AN APPROVED TYPE
III.SPEED LIMITATION DEVICES (SLD) AND ADJUSTABLE SPEED LIMITATION DEVICE (ASLD)
1. SCOPE
1.1. This regulation applies to:
1.1.1. Part I: Vehicles of Categories M , M , N and N equipped with an SLD and to vehicles
of Categories M and N equipped with an adjustable speed limitation device ASLD which
have not been separately approved according to Part III of this Regulation, or to vehicles so
designed and/or equipped that their component parts can be regarded as totally or partially
fulfilling the function of an SLD or ASLD, as appropriate.
1.1.2. Part II: The installation on vehicles of Categories M , M , N and N of SLDs and installation
on vehicles of Categories M and N of ASLD which have been type approved to Part III of
this Regulation.
1.1.3. Part III: SLDs which are intended to be fitted to vehicles of Categories M , M , N and N
and ASLD which are intended to be fitted to vehicles of Categories M and N.
1.2. Purpose
The purpose of this Regulation is to limit the road speed of vehicles by means of a vehicle
system which has the primary function of controlling the fuel feed to the engine or via the
engine management.
1.2.1. A speed limitation device (SLD) or function (SLF) shall limit the maximum speed of vehicles
of Categories M , M , N and N .
1.2.2. When fitted, the adjustable speed limitation device (ASLD) or function (ASLF) shall limit the
speed of vehicles of Categories M and N to a speed voluntarily set by the driver when it is
activated.

2.6. For the purpose of Part III of this Regulation:
2.6.1. "Speed limitation device (SLD)" means a device whose primary function is to control the
fuel feed to the engine in order to limit the vehicle speed to the specified value;
2.6.2. "Approval of an SLD" means the approval of a type of SLD with respect to the
requirements laid down in Paragraph 21 below;
2.6.3. "Type of an SLD" means SLDs which do not differ with respect to the essential
characteristics such as:
The make and type of the device,
The range of speed values at which the SLD may be set,
The method used to control the fuel feed of the engine.
PART I
APPROVAL OF VEHICLES WITH REGARD TO LIMITATION OF THEIR MAXIMUM SPEED
3. APPLICATION FOR APPROVAL
3.1. The application for approval of a vehicle type with regard to speed limitation shall be
submitted by the vehicle manufacturer or by his duly accredited representative.
3.2. It shall be accompanied by the under-mentioned documents in triplicate and by the following
particulars:
3.2.1. A detailed description of the vehicle type and of vehicle parts related to the speed limitation,
comprising the particulars and documents referred to in Annex 1 to this Regulation;
3.2.2. A vehicle representative of the type to be approved shall be submitted to the technical
service responsible for conducting the approval tests;
3.2.3. A vehicle not comprising all the components proper to the type may be accepted for test
provided that it can be shown by the applicant to the satisfaction of the competent authority
that the absence of the components omitted has no effect on the results of the verifications,
so far as the requirements of this Regulation are concerned.
3.3. The competent authority shall verify the existence of satisfactory arrangements for ensuring
effective checks on conformity of production before type approval is granted.
4. APPROVAL
4.1. If the vehicle submitted for approval pursuant to this Regulation meets the requirements of
Paragraph 5 below, approval of that vehicle type shall be granted.

4.9. In addition to the marking requirements of Paragraph 4.4. above Contracting Parties to this
Regulation may require the vehicle to be equipped with a plate which is in a conspicuous
and readily accessible position within the driving compartment and which shows clearly and
indelibly:
4.9.1. The words "SPEED LIMITER FITTED" (or other words to similar effect),
4.9.2. The name or trade mark of the SLD calibrator (if applicable),
4.9.3. A circle surrounding the Letter "E" followed by the distinguishing number of the country
which has granted approval and the number of this Regulation, followed by the Letter "R",
and
4.9.4. The set speed in km/h (and mile/h if requested) at which the vehicle is calibrated.
5. REQUIREMENTS
5.1. Requirements for vehicles of Categories M , M , N and N equipped with SLF.
5.1.1. The speed limitation must be such that the vehicle in normal use, despite the vibrations to
which it may be subjected, complies with the provisions of Part I of this Regulation.
5.1.2. In particular, the vehicle's SLD must be so designed, constructed and assembled as to
resist corrosion and ageing phenomena to which it may be exposed and to resist tempering
in accordance with Paragraph 5.1.6. below.
5.1.2.1. The limitation threshold must not, in any case, be capable of being increased or removed
temporarily or permanently on vehicles in use. The inviolability shall be demonstrated to the
technical service with documentation analysing the failure mode in which the system will be
globally examined. The analysis shall show, taking into account the different states taken
by the system, the consequences of a modification of the input or output states on the
functioning, the possibilities to obtain these modifications by failures or by voluntary violation
and the possibility of their occurrence. The analysis level will be always to the first failure.
5.1.2.2. The speed limitation function and the connections necessary for its operation, except those
essential for the running of the vehicle, shall be capable of being protected from any
unauthorised adjustments or the interruption of its energy supply by the attachment of
sealing devices and/or the need to use special tools.
5.1.3. The speed limitation function shall not actuate the vehicle's service braking system. A
permanent brake (e.g. retarder) may be incorporated only if it operates after the speed
limitation function has restricted the fuel feed to the minimum fuel position.
5.1.4. The speed limitation function must be such that it does not affect the vehicle's road speed if
a positive action on the accelerator is applied when the vehicle is running at its set speed.
5.1.5. The speed limitation function may allow normal accelerator control for the purposes of gear
changing.
5.1.6. No malfunction or unauthorised interference shall result in an increase in engine power
above that demanded by the position of the driver's accelerator.

5.2.6. Setting of V :
5.2.6.1. It shall be possible to set V value by steps not greater than 10 km/h between 30 km/h and
the maximum design speed of the vehicle.
5.2.6.2. In the case of vehicles manufactured for sale in any country where imperial units are used, it
shall be possible to set V value by steps not greater than 5 mph between 20 mph and the
maximum design speed of the vehicle.
5.2.6.3. This shall be achieved by a control device operated directly by the driver.
5.2.7. Activation/de-activation:
5.2.7.1. The ASLF must be capable of being activated/de-activated at any time.
5.2.7.2. The ASLF must be de-activated each time the engine is stopped by a deliberate action of
the driver.
5.2.7.3.
When the ASLF is activated the initial setting of V
shall not be less than the current
vehicle speed.
5.3. Tests
5.3.1. The speed limitation tests to which the vehicle presented for approval is submitted as well
as the limitation performances required, are described in Annex 5 of this Regulation. At the
request of the manufacturer and with the agreement of the type approval authority, vehicles
whose theoretical limitation speed V does not exceed the set speed Vset defined for those
vehicles may be exempt from the testing of Annex 5 providing the requirements of this
Regulation are met.
5.3.2. The adjustable speed limitation tests to which the vehicle presented for approval are
submitted are described in Annex 6 of this Regulation.
5.3.2.1. Three different speeds will be chosen for the tests at the discretion of the technical service.
6. MODIFICATIONS OF VEHICLE TYPE AND EXTENSION OF APPROVAL
6.1. Every modification of the vehicle type shall be notified to the administrative department
which approved the vehicle type. The department may then either:
6.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect and
that in any case the vehicle still complies with the requirements, or
6.1.2. Require a further test report from the technical service responsible for conducting the tests.
6.2. Confirmation or refusal of approval, specifying the alteration, shall be communicated by the
procedure specified in Paragraph 4.3. above to the Parties to the 1958 Agreement which
apply this Regulation.
6.3. The competent authority issuing an extension of approval shall assign a series number to
each communication form drawn up for such an extension and inform thereof the other
Parties to the 1958 Agreement applying this Regulation by means of a communication form
conforming to the model in Annex 1 to this Regulation.

8. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
8.1. The approval granted in respect of a vehicle type pursuant to this Regulation may be
withdrawn if the requirements laid down in Paragraph 5 above are not complied with.
8.2. If a Contracting Party to the 1958 Agreement applying this Regulation withdraws an
approval it has previously granted, it shall forthwith so notify the other Contracting Parties
applying this Regulation, by means of a communication form conforming to the model in
Annex 1 to this Regulation.
9. PRODUCTION DEFINITELY DISCONTINUED
9.1. If the holder of the approval completely ceases to manufacture a type of vehicle approved in
accordance with this Regulation, he shall so inform the authority which granted the
approval. Upon receiving the relevant communication, that authority shall inform thereof the
other Parties to the 1958 Agreement applying this Regulation by means of a communication
form conforming to the model in Annex 1 to this Regulation.
10. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS AND OF ADMINISTRATIVE DEPARTMENTS
10.1. The Contracting Parties to the 1958 Agreement applying this Regulation shall communicate
to the United Nations secretariat the names and addresses of the technical services
responsible for conducting approval tests and of the administrative departments which grant
approval and to which forms certifying approval or extension, or refusal or withdrawal of
approval or production definitely discontinued, issued in other countries, are to be sent.
PART II
APPROVAL OF VEHICLES WITH REGARD TO THE INSTALLATION OF
A SPEED LIMITATION DEVICE (SLD) OF AN APPROVED TYPE
11. APPLICATION FOR APPROVAL
11.1. The application for approval of a vehicle type with regard to the installation of an SLD of an
approved type shall be submitted by the vehicle manufacturer or by his duly accredited
representative.
11.2. It shall be accompanied by the under-mentioned documents in triplicate and by the following
particulars:
11.2.1. A detailed description of the vehicle type and of vehicle parts related to the speed limitation,
comprising the particulars and documentation referred to in Annex 2 to this Regulation.
11.2.2. At the request of the competent authority the type approval communication form
(i.e. Annex 3 of this Regulation) of each type of SLD shall also be supplied.

12.5. If the vehicle conforms to a vehicle type approved, under one or more other Regulations
annexed to the Agreement, in the country which has granted approval under this
Regulation, the symbol prescribed in Paragraph 12.4.1 need not be repeated; in such a
case the Regulation and approval numbers and the additional symbols of all the Regulations
under which approval has been granted in the country which has granted approval under
this Regulation shall be placed in vertical columns to the right of the symbol prescribed in
Paragraph 12.4.1.
12.6. The approval mark shall be clearly legible and indelible.
12.7. The approval mark shall be placed close to or on the vehicle data plate affixed by the
manufacturer.
12.8. Models B and C of Annex 4 to this Regulation give examples of arrangements of approval
marks.
12.9. In addition to the marking requirements of Paragraph 12.4. above, Contracting Parties to
this Regulation may require the vehicle to be equipped with a plate which is in a
conspicuous and readily accessible position within the driving compartment and which
shows clearly and indelibly:
12.9.1. The words "SPEED LIMITER FITTED" (or other words to similar effect),
12.9.2. The name or trade mark of the SLD calibrator (if applicable),
12.9.3. A circle surrounding the Letter "E" followed by the distinguishing number of the country
which has granted approval and the number of this regulation, followed by the Letter "R",
and
12.9.4. The set speed in km/h (and mile/h if requested) at which the vehicle is calibrated.
13. REQUIREMENTS
13.1. Requirements concerning the installation of an approved SLD.
13.1.1. The SLD shall be so installed as to enable the vehicle in normal use, despite the vibrations
to which it may be subjected, to comply with the provisions of Part II of this Regulation.
13.1.2. The information document shall indicate how inviolability of the SLD is assured. The
analysis level will be always to the first failure.
13.1.3. The speed limitation function shall be obtained regardless of the accelerator control used if
there is more than one such control which may be reached from the driver's seating
position.
13.1.4. The applicant for approval shall provide documentation describing checking and calibration
procedures. It shall be possible to check the functioning of the speed limitation function
whilst the vehicle is stationary, (e.g. for conformity of production or periodic inspection).

15.4. The competent authority which granted type approval may at any time verify the conformity
control methods applied for each production unit. The authority may also carry out random
checks on serially manufactured vehicles in respect to the requirements set out in
Paragraph 13 above.
15.5. Where unsatisfactory results are found during verifications and checks pursuant to
Paragraph 15.4. above, the competent authority shall ensure that all necessary steps are
taken to restore conformity of production as rapidly as possible.
15.6. The normal frequency of inspections authorized by the competent authority shall be one
every two years. In cases where unsatisfactory results are found during one of these
inspections, the competent authority shall ensure that all necessary steps are taken to
restore conformity of production as rapidly as possible.
16. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
16.1. The approval granted in respect of a vehicle type pursuant to this Regulation may be
withdrawn if the requirements laid down in Paragraph 13 above are not complied with.
16.2. If a Contracting Party to the 1958 Agreement applying this Regulation withdraws an
approval it has previously granted, it shall forthwith so notify the other Contracting Parties
applying this Regulation, by means of a communication form conforming to the model in
Annex 2 to this Regulation.
17. PRODUCTION DEFINITELY DISCONTINUED
17.1. If the holder of the approval completely ceases to manufacture a type of vehicle approved in
accordance with this Regulation, he shall so inform the authority which granted the
approval. Upon receiving the relevant communication, that authority shall inform thereof the
other Parties to the 1958 Agreement applying this Regulation by means of a communication
form conforming to the model in Annex 2 to this Regulation.
18. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS AND OF ADMINISTRATIVE DEPARTMENTS
18.1. The Contracting Parties to the 1958 Agreement applying this Regulation shall communicate
to the United Nations secretariat the names and addresses of the technical services
responsible for conducting approval tests and of the administrative departments which grant
approval and to which forms certifying approval or extension or refusal or withdrawal of
approval or production definitely discontinued issued in other countries, are to be sent.

20.4. There shall be affixed, conspicuously and in a readily accessible place specified on the
approval form, to every SLD conforming to a type of SLD approved under this Regulation an
international approval mark consisting of:
20.4.1. A circle surrounding the Letter "E" followed by the distinguishing number of the country
which has granted approval;
20.4.2. The number of this Regulation, followed by the Letter "R", a dash and the approval number
to the right of the circle prescribed in Paragraph 20.4.1.
20.5. The approval mark shall be clearly legible and indelible.
20.6. Model A of Annex 4 to this Regulation gives examples of arrangements of approval marks.
21. REQUIREMENTS
21.1. General
21.1.1. The SLD shall be so designed, constructed and assembled as to enable the vehicle in
normal use, fitted with the SLD, to comply with the provisions of Part III of this Regulation.
21.1.2. In particular, the SLD must be so designed, constructed and assembled as to resist
corrosion and ageing phenomena to which it may be exposed and to resist tampering in
accordance with Paragraph 21.1.6.
21.1.2.1. The set speed V must not, in any case, be capable of being increased or removed
temporarily or permanently on vehicles in use. The inviolability shall be demonstrated to the
technical service with documentation analysing the failure mode in which the system will be
globally examined. The analysis shall show, taking into account the different states taken
by the system, the consequences of a modification of the input or output states on the
functioning, the possibilities to obtain these modifications by failures or by voluntary violation
and the possibility of their occurrence. The analysis level will be always to the first failure.
21.1.2.2. The SLD and the connections necessary for its operation, except those essential for the
running of the vehicle, shall be capable of being protected from any unauthorised
adjustments or the interruption of its energy supply by the attachment of seals and/or the
need to use special tools.
21.1.3. The SLD shall not actuate the vehicle's service braking system. A permanent brake
(e.g. retarder) may be actuated only if it operates after the speed limitation device has
restricted the fuel feed to the minimum fuel position.

21.2.6. Setting of V :
21.2.6.1. It shall be possible to set V value by steps no greater than 10 km/h (5 mph) between
30 km/h (20 mph) and the maximum design max speed of the vehicle.
21.2.6.2. In the case of vehicles manufactured for sale in any country where imperial units are used, it
shall be possible to set V value by steps not greater than 5 mph between 20 mph and the
maximum design speed of the vehicle.
21.2.6.3. This shall be achieved by a control device operated by the driver.
21.2.7. Activation/de-activation
21.2.7.1. When V is set by the driver it shall not be capable of being modified by any means other
than the designated control device.
21.2.7.2. The ASLD must be capable to be activated/de-activated at any time.
21.2.7.3. The ASLD must be de-activated at each engine stop and the key removed.
21.3. Tests
21.3.1. The speed limitation tests to which the SLD presented for approval is submitted as well as
the performances required are described in Annex 5 to this Regulation.
21.3.2. The adjustable speed limitation tests to which the ASLD presented for approval are
submitted are described in Annex 6 of this Regulation.
21.3.2.1. Three different speeds will be chosen for the tests at the discretion of the technical service.
22. MODIFICATION OF THE SLD TYPE AND EXTENSION OF APPROVAL
22.1. Every modification of the SLD type shall be notified to the administrative department which
approved this type of SLD. The department may then either:
22.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect and
that in any case the SLD still complies with the requirements, or
22.1.2. Require a further test report for some or all the tests described in Annex 5 to this Regulation
from the technical service responsible for conducting the tests.
22.2. Confirmation or refusal of approval, specifying the alteration, shall be communicated by the
procedure specified in Paragraph 20.3. above to the Parties to the 1958 Agreement which
apply this Regulation.
22.3. The competent authority issuing the extension of approval shall assign a series number to
each communication form drawn up for such an extension and inform thereof the other
Parties to the 1958 Agreement applying this Regulation by means of a communication form
conforming to the model in Annex 3 to this Regulation.
23. CONFORMITY OF PRODUCTION
23.1. Every SLD approved under this Regulation shall be so manufactured as to conform to the
type approved by meeting the requirements set out in Paragraph 21 above.

25. PRODUCTION DEFINITELY DISCONTINUED
25.1. If the holder of the approval completely ceases to manufacture a type of SLD approved in
accordance with this Regulation, he shall so inform the authority which granted the
approval. Upon receiving the relevant communication, that authority shall inform thereof the
other Parties to the 1958 Agreement applying this Regulation by means of a communication
form conforming to the model in Annex 3 to this Regulation.
26. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS AND OF ADMINISTRATIVE DEPARTMENTS
26.1. The Contracting Parties to the 1958 Agreement applying this Regulation shall communicate
to the United Nations secretariat the names and addresses of the technical services
responsible for conducting approval tests and of the administrative departments which grant
approval and to which forms certifying approval or extension or refusal or withdrawal of
approval or production definitely discontinued issued in other countries, are to be sent.

13. Approval granted/extended/refused/withdrawn ................................................................................
14. Position of approval mark on the vehicle .............................................................................................
15. Place.....................................................................................................................................................
16. Date......................................................................................................................................................
17. Signature ..............................................................................................................................................
18. The list of documents filed with the administrative service which has granted approval and
available on request is annexed to this communication.

13. Number of report issued by that service ..............................................................................................
14. Approval granted/refused/extended/withdrawn ................................................................................
15. Position of approval mark on the vehicle .............................................................................................
16. Place.....................................................................................................................................................
17. Date......................................................................................................................................................
18. Signature ..............................................................................................................................................
19. The list of documents filed with the administration service which has granted approval and
available on request is annexed to this communication.

12. Ratio of maximum engine power/unladen mass of the vehicle type(s) on which the device may be
installed ................................................................................................................................................
13. Highest ratio of engine speed/vehicle speed in top gear of the vehicle type(s) on which the device
may be installed ...................................................................................................................................
14. Device submitted for approval on.........................................................................................................
15. Technical service responsible for conducting approval tests...............................................................
16. Date of report issued by that service....................................................................................................
17. Number of report issued by that service ..............................................................................................
18. Approval has been granted/refused/extended/withdrawn in respect of the SLD/ASLD ...................
19. Position of approval mark on device ....................................................................................................
20. Place.....................................................................................................................................................
21. Date......................................................................................................................................................
22. Signature ..............................................................................................................................................
23. The list of documents filed with the administration service which has granted approval and
available on request is annexed to this communication.

Model C
The above approval mark affixed to a vehicle shows that the vehicle has been approved in the
Netherlands (E4), pursuant to Regulations Nos. 89 and 31. The first two digits of the approval number
indicate that, at the dates when the respective approvals were given, Regulation No. 31 already included
the 01 series of amendments, and Regulation No. 89 was in its original form. The figure and range of
figures, expressed in km/h, surrounded by a rectangle, show the set speed to which the vehicle is
limited, and the range of set speeds within which the vehicle may be limited.

1.1.4.2.1. The stabilised speed reached by the vehicle shall not exceed the set speed
(V ≤ V ). However, a tolerance of 5% of the V value, or 5 km/h, whichever is the
greater, is acceptable;
1.1.4.2.2. After the stabilised speed is reached for the first time:
1.1.4.2.2.1. V shall not exceed V by more than 5%;
1.1.4.2.2.2. the rate of change of speed shall not exceed 0.5 m/s when measured on a period
greater than 0.1 s;
1.1.4.2.2.3. the stabilised speed conditions specified in 1.1.4.2.3. shall be attained within 10 s of first
reaching V ;
1.1.4.2.3. When stable speed control has been achieved:
1.1.4.2.3.1. speed shall not vary by more than 4% of V or 2 km/h whichever is greater;
1.1.4.2.3.2. the rate of change of speed shall not exceed 0.2 m/s when measured on a period
greater than 0.1 s;
1.1.4.2.3.3. V is the average speed calculated for a minimum time interval of 20 seconds
beginning 10 seconds after first reaching V ;
1.1.4.2.4, Tests in acceleration shall be carried out and the acceptance criteria verified for each
gear ratio allowing in theory the set speed to be exceeded.
V is the maximum speed reached by the vehicle in the first half period of the response
curve.
Figure

1.2.3. Test Method for Steady Speed Test
1.2.3.1. The vehicle shall be installed on the chassis dynamometer. The following acceptance
criteria should be met for power absorbed by the chassis dynamometer varying
progressively from the maximum power P to a value equal to 0.2 P . The speed of
the vehicle shall be recorded in the full range of power defined above. The maximum
speed of the vehicle shall be determined on this range. Test and record defined above
should be made five times.
1.2.3.2. The tests shall be considered satisfactory if the provisions of the preceding
Paragraph 1.1.5.2. and its subparagraphs are satisfied
1.3. Test on Engine Test Bench
This test procedure can be used only when the applicant can demonstrate to the
satisfaction of the technical services that this method is equivalent to the measurement
on a test track.
2. TEST OF ENDURANCE
The speed limiting function or the SLD, as appropriate, shall be submitted to the
durability test prescribed below. However, this may be omitted if the applicant
demonstrates resistance to those effects.
2.1. The device is cycled on a bench simulating the attitude and the movement which the
SLD would experience on the vehicle.
2.2. A functioning cycle is maintained by means of a control system supplied by the
manufacturer. The diagram of the cycle is given below:
t - t , t - t , t - t , t - t : the time taken to do this operation
t - t = 2 seconds
t - t = 1 second
t - t = 2 seconds
t - t = 1 second

2.2.5.2. Sinusoidal vibrations shall be applied in all three planes. Logarithmic sweep shall be
l octave per minute;
2.2.5.2.1. First test: frequency range 10-24 Hz, amplitude ± 2 mm;
2.2.5.2.2. Second test: frequency range 24-1,000 Hz for chassis and cab-mounted components,
input 2.5 g. For engine-mounted components, input 5 g.
2.3. Acceptance Criteria of the Endurance Tests
2.3.1. At the end of the endurance tests, no modification of the device's performances shall be
observed regarding the set speed;
2.3.2. However, if any breaking down of the device occurs during one of the endurance tests, a
second device can be submitted to the considered endurance tests at the manufacturer's
request.

1.4.5. The test shall be considered satisfactory if the following conditions are met:
1.4.5.1. The driver is informed by a warning signal when the actual speed of the vehicle is
exceeding V by more than 3 km/h.
1.4.5.2.
The driver continues to be informed for the duration of the time that V
is exceeded by
more than 3 km/h.
1.5. Test of the Adjustable Speed Limitation Function/Device
1.5.1. With the ASLF/D deactivated, for each gear ratio selected for the chosen test speed V ,
the technical service shall measure the forces required on the accelerator control to
maintain V and a speed (V ), which is 20% or 20 km/h (whichever is the greater) faster
than V .
1.5.2. With the ASLF/D activated and set at V , the vehicle shall be run at a speed of 10 km/h
below V . The vehicle shall then be accelerated by increasing the force on the
accelerator control over a period of 1 s ± 0.2 s to that required to attain V . This force
shall then be maintained for a period of at least 30 seconds, after the vehicle speed has
stabilised.
1.5.3. The instantaneous vehicle speed shall be recorded during the test in order to establish the
curve of the speed versus the time and during the operation of the ASLF/D as
appropriate. The accuracy of the speed measurement shall be ± 1%. The accuracy of the
time measurement shall be less than 0.1 s.
1.5.4. The test shall be considered satisfactory if the following conditions are met:
1.5.4.1.
The stabilised speed (V
) reached by the vehicle shall not exceed V
by more than
3 km/h.
1.5.4.1.1. After V is reached for the first time:
1.5.4.1.1.1. V shall not exceed V by more than 5%;
1.5.4.1.1.2. The rate of change of speed shall not exceed 0.5 m/s when measured over a period
greater than 0.1 s;
1.5.4.1.1.3. The stabilised speed conditions specified in 1.5.4.1.2. shall be attained within 10 s of first
reaching V ;
1.5.4.1.2. When stable speed control has been achieved:
1.5.4.1.2.1. Speed shall not vary by more than 3 km/h of V ;
1.5.4.1.2.2. The rate of change of speed shall not exceed 0.2 m/s when measured over a period
greater than 0.1 s;
1.5.4.1.2.3. V is the average speed calculated for a minimum time interval of 20 seconds beginning
10 seconds after first reaching V ;
1.5.4.1.3. Tests in acceleration shall be carried out and the acceptance criteria verified for each gear
ratio allowing in theory V , to be achieved.
Speed Limiters.