PassNo Overtaking or No Crossing Line Ahead
Where: In the centre of the roadway in the stretch leading up to a barrier line — before blind rises, bends, bridges and intersections.
Purpose: To warn, through the markings themselves, that a solid barrier line is about to begin. The dashes get shorter and the gaps between them get longer as the barrier line approaches. It is a warning marking, not a regulatory one: it tells you what is coming rather than forbidding anything yet.
Action Required by Driver: Treat the shortening dashes as your last chance to decide. If you are thinking about overtaking, abandon it — there is no longer enough road to complete the manoeuvre and get back before the solid line. If you have already started, finish it promptly and return to your lane.
Reading the road surface ahead of the signs
This marking is one of the few that gives you information you cannot get any other way. A driver watching only for signs on poles sees nothing until the barrier line is already underfoot; a driver reading the road surface has several hundred metres of warning.