ISO/FDIS 25333

• Abstract:

  This document specifies a uniform, reproducible testing process for various drive units, chassis, constructions and attached parts as well as sweeping systems of the sweepers described in ISO 24147, with which a comparison of the energy consumption levels can be performed. This defines a representative test circuit and/or test bench cycle with which the energy consumption levels of the sweepers to be inspected can be evaluated and compared within the scope of reproducible test trips and/or test bench runs.

• Status: Not Published
• ICS: 27.015 - Energy efficiency. Energy conservation in general
• ICS: 43.160 - Special purpose vehicles
• Technical Committee: ISO/TC 195/SC 2 - Road operation machinery and associated equipment
• Drafting Committee: ISO/TC 195/SC 2/WG 2 - Sweeper
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 03-Aug-2026
• Completion Date: 03-Aug-2026

Overview

ISO/FDIS 25333: Road sweepers - Environmental efficiency - Requirements on the test procedure for energy consumption is an international standard developed by the International Organization for Standardization (ISO). This document establishes a consistent, reproducible method for measuring and comparing the energy consumption of road sweepers. Covering various technologies including combustion engines, electric drives, hybrids, and alternative-energy systems, ISO/FDIS 25333 applies to all sweeper configurations referenced in ISO 24147.

Energy consumption is a critical indicator of the environmental efficiency of road sweepers. As cities, municipalities, and manufacturers increasingly prioritize sustainability, having standardized measurement protocols enables fair product comparisons and informed purchasing decisions. The test procedures outlined in ISO/FDIS 25333 support compliance with procurement requirements and contribute to reduced emissions and operational costs.

Key Topics

• Uniform Testing Process: ISO/FDIS 25333 defines clear, reproducible methods for measuring energy consumption across a range of sweeper designs, chassis, and drive units.
• Test Procedures: The standard describes representative test circuits and test bench cycles designed to simulate typical road cleaning activities.
• Environmental Conditions: It specifies the environmental conditions under which tests must be conducted (e.g., temperature ranges, air pressure, wind speed, and road surface).
• Sweepers in Scope: Includes truck-mounted, self-propelled, towed, and pedestrian-controlled sweepers as defined in ISO 24147.
• Energy Source Coverage: Embraces conventional fuels (diesel, gasoline), alternative fuels (natural gas, LPG, biodiesel), electricity, and hydrogen.
• Data Collection: Annex A provides a sample data sheet for systematic recording of vehicle parameters and test results, ensuring consistency and traceability.
• Reproducibility & Validity: Requires multiple measurement runs to ensure result reliability, with strict criteria for variation between runs.

Applications

Applying ISO/FDIS 25333 yields significant practical and operational benefits:

• Product Comparison: Enables governments, municipalities, and purchasing authorities to make data-driven decisions when selecting road sweepers based on verified energy performance.
• Sustainability Initiatives: Supports efforts to reduce carbon emissions and energy use in public and private road maintenance operations.
• Environmental Compliance: Helps manufacturers demonstrate compliance with international environmental and energy efficiency requirements, facilitating access to global markets.
• Performance Benchmarking: Provides a fair basis for comparing different types of sweepers, drive technologies, and configurations.
• Procurement Support: Simplifies specification writing and tender evaluations for organizations aiming to procure environmentally efficient sweepers.
• Research & Development: Assists OEMs and developers in optimizing sweeper designs for improved energy efficiency.
• Quality Assurance: Incorporates systematic procedures for data collection and test execution, improving the reliability and consistency of test results.

Related Standards

• ISO 24147:2023 - Road operation machinery and associated equipment - Sweepers - Commercial specifications. Defines the types and commercial specifications of sweepers referenced in ISO/FDIS 25333.
• ISO 3448 - Industrial liquid lubricants - ISO viscosity classification. Referenced for viscosity measurement in related testing.
• VECTO (Vehicle Energy Consumption Calculation Tool) - While not an ISO standard, VECTO is an example of a regional tool referenced for energy measurement in Europe.

By adhering to ISO/FDIS 25333, stakeholders within the road cleaning sector ensure objective, transparent evaluation of sweeper energy efficiency, fostering innovation and advancing sustainable road maintenance practices worldwide.

FINAL DRAFT
International
Standard
ISO/TC 195/SC 2
Road sweepers — Environmental
Secretariat: DIN
efficiency — Requirements on
Voting begins on:
the test procedure for energy
2026-08-03
consumption
Voting terminates on:
2026-09-28
Balayeuses — Efficacité environnementale — Exigences relatives
à la méthode d’essai pour la mesure de la consommation
d’énergie
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 195/SC 2
Road sweepers — Environmental
Secretariat: DIN
efficiency — Requirements on
Voting begins on:
the test procedure for energy
consumption
Voting terminates on:
Balayeuses — Efficacité environnementale — Exigences relatives
à la méthode d’essai pour la mesure de la consommation
d’énergie
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 3
4.1 Sweeper (test unit) .3
4.2 Environmental conditions . .3
4.3 Test circuit .3
4.4 Test bench .3
5 Implementation . . 4
5.1 Measurements on the test track .4
5.1.1 Test method A .4
5.1.2 Test method B .5
5.2 On the test bench .6
5.2.1 General .6
5.2.2 Measurement on the test bench .6
Annex A (informative) Sample data collection sheet for measuring energy consumption of
truck mounted sweeper, self-propelled or towed sweeper . 8
Bibliography .10

iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 195, Building construction machinery and
equipment, Subcommittee SC 2, Road operation machinery and associated equipment.
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
Introduction
As a result of the development of new drive unit concepts for sweepers, as well as the provisions from
procurement guidelines from different regions, there is a demand for universal processes and provisions for
determining the environmental effects of sweepers, with the objective of achieving a uniform evaluation of
the environmental efficiency.
The environmental effects in the utilization phase for sweepers are essentially determined by their energy
consumption from which the relevant CO emissions result.
In order to define appropriate characteristic numbers for the environmental effect of sweepers, it is
necessary to differentiate between sweeping mode and general trips, for instance, to and from the work site.
The objective is to be able to issue an environmental efficiency ID for various vehicle models.
In the future, manufacturers and users should be able to decide whether the consumption measurement is
carried out as a simulation or within the scope of measurement runs.
EXAMPLE In Europe, the Vehicle Energy Consumption calculation tool (VECTO) is used.
NOTE Table 1 contains, in addition to the statutory units, the unit Nm (normal cubic metres). This unit is only
mentioned as an aid in official and commercial transactions (e.g. import/export) with nations that use this unit. 1 Nm
3 3 3 3
of gas is the amount of a gas in a volume of 1 m at 1,013 25 bar and 0 °C. The conversion rate with m is 1 Nm = 1 m .

v
FINAL DRAFT International Standard ISO/FDIS 25333:2026(en)
Road sweepers — Environmental efficiency — Requirements
on the test procedure for energy consumption
1 Scope
This document specifies a uniform, reproducible testing process for various drive units, chassis,
constructions and attached parts as well as sweeping systems of the sweepers described in ISO 24147, with
which a comparison of the energy consumption levels can be performed.
This document defines either a representative test circuit or a test bench cycle with which the energy
consumption levels of the sweepers can be evaluated and compared within the scope of reproducible
measurement runs or test bench runs, or all of these.
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 24147:2023, Road operation machinery and associated equipment — Sweepers — Commercial specifications
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
measuring turbine
measuring device to record fuel consumption using differential measurement in the fuel system
3.2
measurement run
test trip
sweeper (3.8) run in the sweeping mode and transporting mode (3.7) on the test circuit
3.3
test bench run
simulation of a measurement run (3.2) on the test bench
3.4
operating mass
OM
mass of the sweeper (3.8) ready to drive and ready for the operating and sweeping mode with equipment
(and attachment) and empty hopper (3.9) and debris water storage in the most usual configuration as
specified by the manufacturer, and with the operator mass
[SOURCE: ISO 24147:2023, 3.24, modified — "ready to drive and ready for the operating and sweeping mode"
has been added to the definition. The following has been removed from the definition "full fuel tank(s) and

all fluid systems (i.e. hydraulic oil, transmission oil, engine oil, engine coolant) at the levels specified by the
manufacturer and, when applicable, with full water tank(s)", and Notes to entry 3 to 6 have been added.]
Note 1 to entry: The mass of the operator can differ depending on the respective region.
Note 2 to entry: The mass of the operator is not included for pedestrian-controlled-sweepers.
Note 3 to entry: The operating mass of a combustion driven vehicle is the operating mass and full fuel tank(s) and all
fluid systems (i.e. hydraulic oil, transmission oil, engine oil, coolant, urea) at the levels specified by the manufacturer
and, when applicable, with full water tank(s).
Note 4 to entry: The operating mass of a battery
...

ISO/TC 195/SC 2
Secretariat: DIN
Road sweepers — Environmental efficiency — Requirements on the
test procedure for energy consumption
Balayeuses — Efficacité environnementale — Exigences relatives à la méthode d’essai pour la mesure de la
consommation d’énergie
FDIS stage
ISO/DISFDIS 25333:2025-062026(en)
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
E-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 3
4.1 Sweeper (test unit) . 3
4.2 Environmental conditions . 3
4.3 Test circuit . 3
4.4 Test bench . 4
5 Implementation . 4
5.1 Measurements on the test track . 4
5.2 On the test bench . 7
Annex A (informative) Sample data collection sheet for measuring energy consumption of truck
mounted sweeper, self-propelled or towed sweeper . 9
Bibliography . 11

iii
ISO/DISFDIS 25333:2025-062026(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 195, Building construction machinery and
equipment, Subcommittee SC 2, Road operation machinery and associated equipment.
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
Introduction
As a result of the development of new drive unit concepts for sweepers, as well as the provisions from
procurement guidelines from different regions, there is a demand for universal processes and provisions for
determining the environmental effects of sweepers, with the objective of achieving a uniform evaluation of
the environmental efficiency.
The environmental effects in the utilisationutilization phase for sweepers are essentially determined by their
energy consumption from which the relevant CO emissions result.
In order to define appropriate characteristic numbers for the environmental effect of sweepers, it is necessary
to differentiate between sweeping mode and general trips, for instance, to and from the work site.
The objective is to be able to issue an environmental efficiency ID for various vehicle models.
In the future, manufacturers and users should be able to decide whether the consumption measurement is
carried out as a simulation or within the scope of measurement runs.
EXAMPLE : In Europe, the Vehicle Energy Consumption calculation tool (VECTO) is used.
NOTE Table 1 contains, in addition to the statutory units, the unit Nm (normal cubic metres). This unit is only
mentioned as an aid in official and commercial transactions (e.g.,. import/export) with nations that use this unit. 1 Nm
3 3 3 3
of gas is the amount of a gas in a volume of 1 m at 1,013 25 bar and 0 °C. The conversion rate with m is 1 Nm = 1 m .
v
Road sweepers — Environmental efficiency — Requirements on the
test procedure for energy consumption
1 Scope
This document specifies a uniform, reproducible testing process for various drive units, chassis, constructions
and attached parts as well as sweeping systems of the sweepers described in ISO 24147, with which a
comparison of the energy consumption levels can be performed.
This document defines either a representative test circuit or a test bench cycle with which the energy
consumption levels of the sweepers can be evaluated and compared within the scope of reproducible
measurement runs or test bench runs, or all of these.
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 24147:2023, Road operation machinery and associated equipment — Sweepers — Commercial
specifications
3 Terms and definitions
For the purposes of this document, the following terms and definitions are listed in this documentapply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
measuring turbine
measuring device to record fuel consumption using differential measurement in the fuel system
3.2
measurement run
test trip
sweeper (3.8) run in the sweeping mode and transporting mode (3.7) on the test circuit
3.3
test bench run
simulation of a measurement run (3.2) on the test bench
3.4
operating mass
OM
mass of the sweeper (3.8) ready to drive and ready for the operating and sweeping mode with equipment (and
attachment) and empty hopper (3.9) and debris water storage in the most usual configuration as specified by
the manufacturer, and with the operator mass
[SOURCE: ISO 24147:2024, 3.24, modified]

[SOURCE: ISO 24147:2023, 3.24, modified — "ready to drive and ready for the operating and sweeping mode"
has been added to the definition. The following has been removed from the definition "full fuel tank(s) and all
fluid systems (i.e. hydraulic oil, transmission oil, engine oil, engine coolant) at the levels specified by the
manufacturer and, when applicable, with full water tank(s)", and Notes to entry 3 to 6 have been added.]
Note 1 to entry: The mass of the operator can differ depending on the respective region.
Note 2 to entry: The mass of the operator is not included for pedestrian-controlled-sweepers.
Note 3 to entry: The operating mass of a combustion driven vehicle is the operating mass (3.4) and full fuel tank(s) and
all fluid systems (i.e. hydraulic oil, transmission oil, engine oil, coolant, urea) at the levels specified by the manufacturer
and, when applicable, with full water tank(s).
Note 4 to entry: The operating mass of a battery electric vehicle is the operating mass (3.4) and a fully loadenloaded
battery and all fluid systems (i.e. hydraulic oil, transmission oil, coolant) at the levels specified by the manufacturer and,
when applicable, with full water tank(s).
Note 5 to entry: The operating mass of a plug-in hybrid electric vehicle is the operating mass (3.4) and full fuel tank(s)
and fully loadenloaded battery and all fluid systems (i.e. hydraulic oil, transmission oil, engine oil, coolant, urea) at the
levels specified by the manufacturer and, when applicable, with full water tank(s).
Note 6 to entry: The operating mass of a fuel-cell electicalelectrical vehicle is the operating mass (3.4) and full hydrogen
tank(s) and all fluid systems (i.e. hydraulic oil, transmission oil, coolant) at the levels specified by the manufacturer and,
when applicable, with full water tank(s).
3.5
steady state
Statestate in which all operating fluids are at a temperature level that does not vary either during the test
bench run (3.3) or measurement run (3.2) or both.
3.6
sweeping mode
operating mode
state in which the sweeper (3.8) executes cleaning or sweeping activities, if used properly and under the
conditions specified by the manufacturer
3.7
transporting mode
drive mode
state in which the sweeper (3.8) is moved between work sites
3.8
sweeper
road surface cleaning machine
machine designed for cleaning debris from improved surfaces
Note 1 to entry: Sweepers can move debris to a hopper (3.9(3.9)) or other type of disposal container which is attached to
the machine by either mechanical or pneumatic means, or a combination of both.
Note 2 to entry: Combinations of these
...