SIST EN 1794-2:2025/oprA1:2026

Overview

SIST EN 1794-2:2025/oprA1:2026 specifies the assessment methods and criteria for determining the general safety and environmental characteristics of road traffic noise reducing devices, focusing on non-acoustic performance. Developed under the auspices of the Slovenian Institute for Standardization (SIST), this European standard applies to typical roadside conditions. The document delivers concrete test methods where required, ensuring objective evaluation of barriers and similar devices used for reducing noise from road transport infrastructure.

This amendment modifies and supplements the existing EN 1794-2:2024, integrating improved approaches to non-acoustic assessment aligned with contemporary safety and environmental expectations.

Key Topics

The standard covers key areas essential for the non-acoustic evaluation of noise reducing devices in road environments, including:

• General Safety Assessment:

  • Evaluation of device integrity and stability under everyday roadway conditions.
  • Classification of the physical response of materials and structural features.

• Environmental Performance:

  • Assessment of environmental impacts, such as effects on local habitats and emissions other than noise.
  • Review of surface treatments and construction practices in relation to environmental protection.

• Test Methods & Criteria:

  • Objectively defined procedures for laboratory and field evaluation.
  • Criteria for evaluating the presence or absence of free or unsecured components following relevant incidents.

• Evaluation Procedures:

  • Procedures for classifying the performance of devices with regard to both safety and environmental criteria, including detailed result reporting.

Each topic is addressed within dedicated annexes providing comprehensive guidance for practitioners and regulatory bodies.

Applications

The methods and criteria defined in SIST EN 1794-2:2025/oprA1:2026 are applicable throughout the lifecycle of road traffic noise reducing devices, including:

• Product Development:
  Manufacturers can ensure that products meet essential non-acoustic safety and environmental requirements before entering the market.

• Infrastructure Design and Procurement:
  Road planners, engineers, and government authorities rely on this standard to specify, select, and approve noise reducing barriers and similar devices that comply with up-to-date European norms.

• Compliance Verification & Maintenance:
  Periodic assessment using standard methods ensures ongoing compliance, device integrity, and minimized environmental impact across the operational life of infrastructure.

• Regulatory Reference:
  The standard provides a harmonized reference for national and regional regulations in the European Union and wider international contexts.

By embedding these methods in procurement and maintenance plans, stakeholders ensure road safety, protect nearby communities and ecosystems, and support sustainable infrastructure development.

Related Standards

SIST EN 1794-2:2025/oprA1:2026 is part of a suite of standards addressing road traffic noise and related equipment, including:

• EN 1794-1: Road traffic noise reducing devices - Non-acoustic performance - Part 1: Methods of determination of mechanical and stability characteristics.
• EN 1793 Series: Assessment of the acoustic performance of noise reducing devices for road traffic.
• Other Relevant ICS (International Classification for Standards) Codes:
  • 13.020.99 (Environmental protection)
  • 17.140.30 (Noise emitted by means of transport)
  • 93.080.30 (Road equipment and installations)

These documents collectively provide a complete framework for the design, evaluation, and maintenance of effective and safe road noise barriers, ensuring integration of both acoustic and non-acoustic performance requirements.

Adhering to SIST EN 1794-2:2025/oprA1:2026 ensures the provision of road noise barriers that are not only effective in reducing noise but are also safe, environmentally responsible, and compliant with the latest European standards.