Warning signs
What do warning signs look like?

Warns of a steep descent
Warns of a steep descent
Is the steep downhill warning sign important for the theory test and the practical driving test?
The steep downhill warning sign is one of the warning signs you must know on the class B theory test. During the practical driving test you must also show that you recognize it, slow down, and use the right gear when going downhill.
What does the steep downhill warning sign mean?
The steep downhill warning sign warns that the hill ahead is so long and steep that the brakes can overheat or lock up. You must choose a low gear and adjust your speed to maintain control.
When do you encounter the steep downhill warning sign?
You encounter the steep downhill warning sign when a descent exceeds the established limits for slope and length (for example 6% over 4.5 km or 10% over 1 km). Typically on mountain passes, motorways, or narrow country roads.
Where do you find the steep downhill warning sign?
The steep downhill warning sign is often used before:
- Mountain passes – long, steep descents.
- Motorways and tunnels – where the top of the hill is not visible.
- Narrow country roads – when heavy vehicles need advance warning.
In the picture you see the steep downhill warning sign before a long descent on a mountain road.

What happens if you do not adjust your speed at the steep downhill warning sign?
If you do not slow down and use engine braking in a low gear, the brakes can overheat or lock up. The result can be poor control or serious accidents.
Why is the steep downhill warning sign important?
This sign helps you prepare for demanding descents, control your speed, and increases safety for all road users.
Frequently asked questions (FAQ) about the steep downhill warning sign
- Does the sign apply to motorcycles? – Yes, all motor vehicles must adjust their speed at the steep downhill warning sign.

