The Chesapeake Bay Bridge-Tunnel is currently operating under level two wind restrictions, according to the CBBT Twitter page.
That means winds are in excess of 47 m.p.h.
The following types of vehicles will not be allowed to cross the facility during level two wind restrictions:
Large pick-up campers
Anything being towed
Automobiles with car top carriers, luggage racks, etc.
Vehicles with any exterior cargo
Empty tractor trailers, not to include empty tanker trucks
Small six-wheel trucks such as moving vans, rental trucks, school buses, etc.