The SN Parapet Series is a high-performance range of steel vehicle restraint systems (VRS) designed for the UK highways network. Tested and certified to EN 1317 standards, the SN family delivers reliable containment for motorways, bridges, and high-risk carriageway environments. With multiple containment levels and working widths—including SN1W1, SN2W1, SN2W2, SN2W4, SNH2W4, and SNH4a—the SN Parapet Series provides a flexible, compliant solution for modern infrastructure projects, offering long-term durability and proven performance.
The SN Parapet family includes a comprehensive range of systems designed to meet varying containment and working width requirements:
System | Containment Level | Working Width |
SN1W1 | N1 | W1 |
SN2W1 | N2 | W1 |
SN2W2 | N2 | W2 |
SN2W4 | N2 | W4 |
SNH2W4 | H2 | W4 |
SNH4a | H4a | W3 |
Each variant is engineered to integrate with UK highway standards and can be installed in conjunction with both proprietary and Non-Proprietary Safety Barrier Systems (NPSBS).
EN 1317 Certified – Fully tested for N1, N2, H2, and H4a containment levels
Multiple Containment & Working Width Options – SN1 to SNH4a
Modular Steel Construction – Simplifies installation and future maintenance
Galvanised Components – Ensures long-term corrosion resistance and durability
UK Highway Network Compatibility – Suitable for motorways, bridges, and high-risk carriageway environments
The SNH4a Parapet is a high-containment variant within the SN family, engineered for locations where maximum vehicle restraint is required, such as motorways, trunk roads, and bridges.
To install any SN Parapet system, operatives must complete the relevant Saferoad installation training course.
This ensures safe, compliant, and effective installation in line with UK highway standards.
Visit our Training Page for more information on available courses and certification requirements.
The SN Parapet Series provides flexible, high-performance roadside safety solutions for a wide range of infrastructure projects.
