PAS 68 (Publicly Available Specification) is a British standard that specifies the performance criteria required to assess the impact resilience of vehicle security barriers.

Specifically, it outlines the requirements for testing vehicle security barriers to classify their ability to resist various types and sizes of vehicles traveling at different speeds.

The PAS 68 standard is internationally recognized and commonly used by manufacturers, designers, and installers of vehicle security barriers to ensure their products meet the necessary safety and security standards.

Key aspects of PAS 68 include:

  • Defining the classification of vehicle impact testing, standardizing the test methods and criteria for evaluating barrier performance, and setting requirements for rating and certifying the barriers based on their tested performance levels.
  • The standard helps ensure consistency in barrier design and testing, providing a reliable way to compare different products in terms of their effectiveness in protecting against hostile vehicle attacks.

Overall, PAS 68 plays a crucial role in enhancing physical security measures at sites that require protection from unauthorized vehicle access, such as critical infrastructure, government buildings, embassies, and high-security facilities.

Compliance with PAS 68 provides reassurance to stakeholders that the vehicle security barriers in place have been rigorously tested and proven to meet the necessary standards for impact resistance.

In the UK, PAS standards are developed and overseen by the BSI (British Standards Institute)

The ARX STOPPER!™ carries a PAS68 tested rating of V/7475(N2)/48/90:20/0.0


V means the barrier was tested against an actual Vehicle. If that letter is a D the barrier underwent a simulated test of the Design of the barrier.


7475(N2) equates to the mass and the vehicle type. The weight is stated in Kg and type of vehicle. This test was carried out using an N2 class vehicle (see vehicle classifications below)


48 is the test speed of the vehicle in KMH


90 is the angle of attack which was 90° to the barrier although this could be tested at a 45° angle for example.


20 equates to the impact penetration in meters and is the distance the load carrying part of the vehicle travelled after contact with the barrier measured from the Datum Line or back face of the product being tested. 


0.0 relates to the dispersion distance of any major debris and is measured in meters.