12,480 M SINGLE-TUBE TUNNEL. 4 PERSONS IN BROKEN-DOWN CAR. 1 QUICK INTERVENTION. TUNNEL INTERCOM | Optimal emergency call and hazard management.
12,480 M SINGLE-TUBE TUNNEL. 4 PERSONS IN BROKEN-DOWN CAR. 1 QUICK INTERVENTION. TUNNEL INTERCOM | Optimal emergency call and hazard management.