Traffic sign B21: Narrow passage: priority

The B21 sign stands before a narrow passage and means: you have priority over oncoming traffic. It always goes together with the B19 sign on the other side of the narrowing.

Priority signs decide who goes first. At roadworks they mostly appear where the carriageway is reduced to a single lane: B19 on one side, B21 on the other, so both directions know who has right of way.

Anyone who puts up a traffic sign on the public road for works needs the consent of the road authority: through the occupation permit or through a signage permit with a signage plan. Without that consent you may not put up the sign.