The vehicle height measurement system is mounted on the extension of the portal before extending the plateau in front of the tunnel or when entering the highway. Built-in high-end detection detectors are based on active infrared technology. The system is connected to a software module that will prohibit the entry of a too-expensive vehicle into either the tunnel or the motorway itself.

In the case of vehicle height detection, the authorized system automatically activates the equipment for redirecting the vehicle via the specified algorithms.