Regulatory signs
Mandatory Height
At non-arch bridges mandatory signs may be used; it is unlawful for an overheight vehicle to pass one of these. They are placed on the bridge and at the side of the road in front of the bridge. Some height restrictions may still show imperial units of measurement only. These signs will be replaced when they reach the end of their life.
Advance warning of a mandatory height restriction ahead; the sign may include an arrow, if the restriction is on a side road.
Warning sign
