What else can happen when you can't raise the roof of the tunnel,you can lower the vehicle.
http://www.livetrucking.com/a-truck-got-stuck-at-an-airport-terminal-and-held-up-traffic-overnight/
http://www.livetrucking.com/a-truck-got-stuck-at-an-airport-terminal-and-held-up-traffic-overnight/