Road narrows

Right-hand lane narrowing to calm traffic in a residential area in Hamburg

A lane narrowing is different from a lane closure if at least one lane per directional lane remains open. It can be displayed on both sides according to § 40 StVO by sign 120 (narrowed lane) or sign 121 (one-sided right narrowed lane).

Roadways narrowed on both sides are often a less wide bridge , underpass or a traffic-calmed area . Roadways narrowed on one side (right) are often a work place or a traffic obstacle, especially on inner-city and extra-urban roads.

Slowly approach the bottleneck is indicated. Often the traffic signs 308 or 309 regulate the right of way.

On multi-lane roads, especially on federal motorways , the zip fastener method is to be used if several lanes end abruptly in each direction and at least one continuous lane is omitted.

Norms and standards

Germany

Guidelines for Securing Workplaces on Roads (RSA)

Austria

RVS 05.05.40 ff. - Construction site protection

Switzerland

SN 640 885c - Signalization of construction sites on motorways and motorways