The extra aspect you have with a two arm system is that the second arm guides your traffic back two their own lane after the redirection should finish.
This VEVA is a modular system, built of standard modules, and carried out with the Step Barrier Profile. This modular system guarantees an easy replacement in case of damage.
The movable barrier is full scale tested according to the newest European directions and guidelines and it fully meets the standards of traffic safety class H2. That is why the VEVA needlessly links up with the dynamic developments in traffic safety control.