I knew somebody was going to point out that oversized vehicles won't fit. For your knowledge, these vehicles are not normally legal to drive(in the EU), they need to have special permissions, display "oversized" badge on the back and on the front, but most importantly, they need to have their route planned and approved days in advance from actually driving anywhere. So none of these vehicles would ever crash into a tunnel, because such a route would not be approved in the first place.
By "any" I mean any of the sizes approved for legal road use, and there is not many of them. Trailers can only be of a certain height and width, and most tunnels are built to accomodate for those dimensions.
And usually, tunnels are built to either make the route shorter, or redirect traffic out of the city. So if the biggest vehicles on the road cannot use them, and have to go through the city, then it defeats the point of building the tunnel altogether.
By "any" I mean any of the sizes approved for legal road use, and there is not many of them. Trailers can only be of a certain height and width, and most tunnels are built to accomodate for those dimensions. And usually, tunnels are built to either make the route shorter, or redirect traffic out of the city. So if the biggest vehicles on the road cannot use them, and have to go through the city, then it defeats the point of building the tunnel altogether.