Art. 14 Ordinance of September 5, 1979 on Road Signs (OSR) - Traffic Lights, ... Traffic Jam

The signal "Traffic Lights" (1.27) indicates a traffic light installation before which the driver must stop if necessary. It shall be placed before traffic light installations located outside of urban areas and may be used as an advance signal to announce traffic lights used to temporarily close certain traffic lanes (Art. 69, Para. 4); within urban areas, it may be placed on high-speed roads or other roads where the traffic light installation cannot be seen in time.

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The signal "Traffic Jam" (1.31) warns drivers of the presence of stationary or slow-moving queues of vehicles. It is only permitted to place it permanently at locations where traffic jams are likely to occur frequently.

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