Warning for Speed Hump
The signs indicate a raised area or dip that has been constructed as a speed-reducing measure.
When You See This Sign
When you see A9, slow down well in advance and prepare to pass a raised area or dip intended to reduce speed. Watch for any distance plates and other road users, and pass slowly and in a controlled manner to maintain control and minimize discomfort.
Rules & Regulations
- A9 is a warning sign indicating that there is a raised area or dip constructed as a speed-reducing measure.
- When the sign appears, you are required to adjust your speed and be prepared to slow down to pass the traffic-calming measure safely.
- The sign may be supplemented with a distance plate (e.g., "50 m") or another supplementary plate — in that case, follow the additional instructions.
- The warning applies to the traffic in the lane for which the sign is placed; show particular consideration for cyclists and pedestrians who may be affected by the traffic-calming measure.
Tips for Drivers
- Reduce speed smoothly well before the traffic-calming measure and avoid harsh braking directly over the raised section.
- Maintain an even and controlled speed while passing to reduce jolts and preserve grip.
- Increase the distance to the vehicle ahead so you can brake in a controlled manner without risking being rear-ended.
- Be aware of cyclists and moped riders who may choose to ride around the obstacle or slow down significantly more than cars.
Common Mistakes
- Believing that the sign requires a complete stop — normally you should not stop but instead adjust your speed.
- Braking hard directly over the obstacle instead of gradually reducing speed beforehand, which can cause damage to the vehicle or its occupants.
- Confusing a traffic-calming measure with general uneven road surface and underestimating that it may be an intentionally constructed higher hump or deeper dip.
Test Yourself
Road Sign: Warning for Speed Hump
What is expected of you as a driver when you see this sign?
- A There are speed bumps (e.g., raised area or dip) — adjust your speed to pass safely.
- B Parking is prohibited to keep the road clear.
- C Warning of speed control — reduce speed to the indicated limit.
- D Walking-speed zone begins — maximum speed is approx. 7–10 km/h.
Exam Tip
On the theory test you may be asked to distinguish A9 (an intentionally constructed traffic-calming measure) from the sign for uneven road — remember that A9 refers to built speed-reducing devices.
Did You Know?
Traffic-calming measures marked by A9 are common in residential areas and near schools because they reduce traffic speed without requiring a permanent speed limit.
Frequently Asked Questions
Do I always have to stop at a traffic-calming measure?
No, you normally should not stop at a traffic-calming measure but adjust your speed and pass slowly and safely. Only stop if there is a specific reason, such as an obstacle or an accident.
How far in advance is the warning sign usually placed?
Placement may vary depending on road type and speed, but the sign is placed with enough time for you to adjust your speed. It is often supplemented with a distance plate (e.g., "50 m") that shows the exact distance.
Does the sign also apply to cyclists and moped riders?
Yes, the traffic-calming measure affects all road users using the carriageway, so cyclists and moped riders must also adjust their speed. Show consideration and give them space if they need to choose a different line to pass.
Am I allowed to overtake near a traffic-calming measure?
Overtaking near a traffic-calming measure is often inappropriate and can be dangerous, especially if visibility is limited or cyclists are present. Overtake only when it is completely safe and can be done without creating risk for other road users.
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