Mobile roadworks with a left-side lane reduction

The yellow temporary panel may be fitted to a roadworks vehicle. Its lane diagram warns that a left-side lane is closed or merges, reducing the available lanes from three to two, while the roadworks symbol and 500 m indication describe the affected section or advance warning. Flashing amber lamps may supplement the panel. The diagram tells drivers which lanes remain available. It does not state how many vehicles may pass at once or identify a stopping bay on the left.