Road Signs | Width or Height Restriction

Arch bridge - DOT531.1
The maximum safe headroom at an arch bridge is shown on the triangular warning signs. Road markings guide high vehicles through the highest part of the arch. Drivers of all vehicles should give way to oncoming high vehicles in the middle of the road when there is insufficient room to pass. Drivers of cars and other low vehicles may keep to the left-hand side of the road, crossing the road markings, where this would enable them to pass oncoming vehicles in safety