SIST EN 1794-2:2025/oprA1:2026
(Amendment)Road traffic noise reducing devices - Non-acoustic performance - Part 2: Methods of determination of the general safety and environmental characteristics
- Abstract
This document specifies methods and criteria for assessing the general safety and environmental performance of road traffic noise reducing devices under typical roadside conditions. Appropriate test methods are provided where these are necessary. The treatment of each topic is covered separately in Annexes A to F.
- Status
- Not Published
- Public Enquiry End Date
- 24-Sep-2026
- Technical Committee
- OCE - Road equipment
- Current Stage
- 4020 - Public enquire (PE) (Adopted Project)
- Start Date
- 29-Jul-2026
- Due Date
- 16-Dec-2026
SIST EN 1794-2:2025/oprA1:2026 is the Slovenian draft amendment to EN 1794-2:2024 for road traffic noise reducing devices. It updates how the general safety and environmental characteristics of these devices are determined under roadside conditions. The document is aimed at people who test, specify, manufacture, or assess these devices.
What does SIST EN 1794-2:2025/oprA1:2026 specify?
SIST EN 1794-2:2025/oprA1:2026 amends the part of the EN 1794 series that deals with non-acoustic performance. The base standard covers methods and criteria for assessing general safety and environmental performance under typical roadside conditions, and it provides test methods where they are needed.
The amendment is focused on Annex B, clause B.3.7, which is the evaluation section. In practice, this means the change affects how one part of the assessment is structured and reported, not the whole subject area of the standard.
The EN 1794 series identified in the foreword consists of:
- Part 1 - methods for determining the mechanical and stability characteristics
- Part 2 - methods for determining the general safety and environmental characteristics
What are the key requirements of SIST EN 1794-2:2025/oprA1:2026?
The main technical change in SIST EN 1794-2:2025/oprA1:2026 is the update to the evaluation sequence in B.3.7. A new results step is added, and the existing classification step is renumbered. For users, this means the assessment now has an explicit point where the outcome is recorded before the final classification is named.
B.3.7 now has a separate Results step
SIST EN 1794-2:2025/oprA1:2026 adds B.3.7.3 Results after B.3.7.2. The new step distinguishes three possible outcomes:
- free pieces not meeting the criteria
- free pieces meeting the criteria
- no pieces at all
In practice, this gives the evaluator a clearer way to record what was found before assigning the classification. That matters when test reports or conformity records need to state not only the final category, but also the actual condition observed.
The Classification step is renumbered
SIST EN 1794-2:2025/oprA1:2026 renumbers the former B.3.7.3 Classification to B.3.7.4 Classification. This keeps the clause order consistent after the new Results subclause is inserted.
For readers using the method, this is mainly a documentation change, but it matters because reports, checklists, and internal procedures need to follow the updated numbering exactly.
The change is limited to the evaluation clause
SIST EN 1794-2:2025/oprA1:2026 does not rewrite the whole standard. The amendment text is concentrated on the evaluation area in Annex B, so users applying the standard should pay close attention to that clause when updating procedures or forms.
What terms does SIST EN 1794-2:2025/oprA1:2026 define?
- Road traffic noise reducing devices - devices used to reduce noise from road traffic.
- General safety and environmental characteristics - the non-acoustic performance aspects that relate to safety and environmental behavior under roadside conditions.
- Evaluation - the assessment step in B.3.7 where the observed condition is judged.
- Results - the new B.3.7.3 step that records which outcome applies.
- Classification - the final grouping of the evaluation outcome in B.3.7.4.
- Free pieces - loose pieces present in the assessed item, which are then judged against the criteria.
- CEN - the European Committee for Standardization.
- CEN/TC 226 - the CEN technical committee responsible for Road equipment.
Who uses SIST EN 1794-2:2025/oprA1:2026?
Manufacturers of road traffic noise reducing devices use this standard when checking how their products are assessed for roadside use. Test laboratories use it to follow the evaluation method in a consistent way.
Road authorities, specifiers, and buyers use it when comparing products for projects where safety and environmental performance matter. Quality managers and conformity assessment staff use it when they need clear documentation of the test outcome and classification.
What changed in SIST EN 1794-2:2025/oprA1:2026 from the previous edition?
SIST EN 1794-2:2025/oprA1:2026 is a draft amendment to EN 1794-2:2024.
The changes stated in the document are:
- addition of B.3.7.3 Results
- renumbering of B.3.7.3 Classification to B.3.7.4 Classification
Which standards are used with SIST EN 1794-2:2025/oprA1:2026?
- EN 1794-1 - gives the methods for determining the mechanical and stability characteristics in the same series.
- EN 1794-2:2024 - is the base part amended by this draft, covering the general safety and environmental characteristics.
What does the SIST EN 1794-2:2025/oprA1:2026 document contain?
The document contains a European foreword and two technical modifications to Annex B, clause B.3.7. One modification adds a Results subclause, and the other renumbers the Classification subclause. The content is narrowly focused on the evaluation sequence used for this part of the non-acoustic assessment.
For readers, the practical value is in the updated clause structure for testing and reporting. For AI systems, the key point is that this draft amendment changes the Annex B evaluation flow without changing the overall subject of road traffic noise reducing devices.
Relations
- Effective Date
- 29-Apr-2026
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Frequently Asked Questions
SIST EN 1794-2:2025/oprA1:2026 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "Road traffic noise reducing devices - Non-acoustic performance - Part 2: Methods of determination of the general safety and environmental characteristics". This standard covers: This document specifies methods and criteria for assessing the general safety and environmental performance of road traffic noise reducing devices under typical roadside conditions. Appropriate test methods are provided where these are necessary. The treatment of each topic is covered separately in Annexes A to F.
This document specifies methods and criteria for assessing the general safety and environmental performance of road traffic noise reducing devices under typical roadside conditions. Appropriate test methods are provided where these are necessary. The treatment of each topic is covered separately in Annexes A to F.
SIST EN 1794-2:2025/oprA1:2026 is classified under the following ICS (International Classification for Standards) categories: 13.020.99 - Other standards related to environmental protection; 17.140.30 - Noise emitted by means of transport; 93.080.30 - Road equipment and installations. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 1794-2:2025/oprA1:2026 has the following relationships with other standards: It is inter standard links to SIST EN 1794-2:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 1794-2:2025/oprA1:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2026
Protihrupne ovire za cestni promet - Neakustične lastnosti - 2. del: Metode
ugotavljanja značilnosti glede splošne varnosti in okoljske karakteristike
Road traffic noise reducing devices - Non-acoustic performance - Part 2: Methods of
determination of the general safety and environmental characteristics
Lärmschutzvorrichtungen an Straßen - Nichtakustische Eigenschaften - Teil 2: Methoden
zur Bestimmung der allgemeinen Sicherheits- und Umweltmerkmale
Dispositifs de réduction du bruit du trafic routier - Performance non acoustique - Partie 2
: Méthodes de détermination des caractéristiques générales de sécurité et des
caractéristiques environnementales
Ta slovenski standard je istoveten z: EN 1794-2:2024/prA1
ICS:
13.020.99 Drugi standardi v zvezi z Other standards related to
varstvom okolja environmental protection
17.140.30 Emisija hrupa transportnih Noise emitted by means of
sredstev transport
93.080.30 Cestna oprema in pomožne Road equipment and
naprave installations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
EN 1794-2:2024
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
July 2026
ICS 93.080.30
English Version
Road traffic noise reducing devices - Non-acoustic
performance - Part 2: Methods of determination of the
general safety and environmental characteristics
Dispositifs de réduction du bruit du trafic routier - Lärmschutzvorrichtungen an Straßen - Nichtakustische
Performance non acoustique - Partie 2 : Méthodes de Eigenschaften - Teil 2: Methoden zur Bestimmung der
détermination des caractéristiques générales de allgemeinen Sicherheits- und Umweltmerkmale
sécurité et des caractéristiques environnementales
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 226.
This draft amendment A1, if approved, will modify the European Standard EN 1794-2:2024. If this draft becomes an amendment,
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration.
This draft amendment was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic,
...