6 meter hydraulic CADO guide rail

The 6 meter hydraulic CADO guide rail was the first automatic highway median emergency access gate. Actually there was a 4 meter prototype designed and build together with the Dutch Road Authorities (Rijkswaterstaat) but during the installation they found out that the access opening was too narrow so the decision was made to enlarged it up to 6 meter. Unless the few demand nowadays you still find them well functioning on several spots in the Netherlands.

Especially with a couple of hydraulic calamity passages CADO’s next to each other there is a cost advantage in operating them on one same hydraulic unit.