'Tunnel area' and expressway signals

Special signals are used in 'Tunnel areas' and expressways. In normal conditions they are switched off or show a green downward arrow or a green light. In dangerous conditions, amber lights flash and the signal shows what action must be taken.

In most tunnels or on expressways the signals are overhead, one applying to each lane. In some places the signal is on the roadside, central reservation or on the tunnel wall alongside the traffic lane or slip road to which it applies.

Illustrated are lane control signs usually mounted on gantries above the road and signals mounted on the roof of the tunnel.

These signals are for safety. Always act on them - danger may be present even if you cannot see the reason.

A green downward arrow A green downward arrow or a green light means you may proceed in the lane if it is safe to do so. green light
green diagonal arrow A green diagonal arrow showing overhead means you must leave the lane in the direction shown. Do not change lanes suddenly and do not move over unless it is safe to do so. If before you can safely leave the lane, you reach the danger or obstruction, stop and wait in that lane until the open lane is clear.
amber light An amber light warns of danger, for example, a traffic accident, an obstruction or risk of skidding. It is usually flashing. Keep your speed under 50 km/h until it is safe to return to normal speed. amber light
red cross A red cross or a red light showing means do not go beyond the signal in the lane. It may also be used at the entrance to a slip road; do not enter the slip road. red light