We have these in the US too because we have a ton of Semi's and big rigs. They can get stuck. Usually the signs include the clearance too, like 12'8". There's

We have these in the US too because we have a ton of Semi's and big rigs. They can get stuck. Usually the signs include the clearance too, like 12'8". There's some funny videos online of trucks getting a haircut from these. So seems necessary to me.