Warning signs
What do warning signs look like?
Warning signs are triangular with a white background, red border and black symbols. There are exceptions to this rule of thumb. They alert you to particular dangers — places on the road where you need to be extra attentive and drive at a low enough speed to handle the hazard.

Road narrows on the left side
The sign warns that the road becomes narrower on the left side
Road narrows on the left side
Is the road narrows on the left warning sign important for the theory test and the practical driving test?
The road narrows on the left warning sign is one of the basic warning signs you must know. On the theory test you may be asked about its meaning, and during the practical driving test you must show that you both recognize the sign and adjust your speed.
What is the road narrows on the left warning sign?
This sign warns that the road becomes narrower on the left side. The sign helps you avoid accidents when the road suddenly narrows.
When do you encounter the road narrows on the left warning sign?
You see this sign before:
- Narrow bridge – the bridge narrows on the left side.
- Underpasses – tunnels or lower passages narrow the road.
- Traffic calming measures – humps or narrowings create a tighter lane on the left.
In the picture you see the road narrows on the left warning sign in place.

How do you adapt your driving at the road narrows on the left warning sign?
When you see this sign, slow down in good time, keep to the right in the lane, and watch out for oncoming traffic. Consider whether it is necessary to stop if meeting larger vehicles becomes difficult.

