What is aquaplaning?
Aquaplaning (also called hydroplaning) occurs when a water layer builds up between the tires and the road surface. The tires lose contact with the asphalt, and the car becomes uncontrollable. You cannot steer or brake effectively.
Aquaplaning occurs when the tire cannot push water to the sides fast enough. This typically happens with:
- High speed on wet roads
- Lots of water on the road (heavy rain, large puddles)
- Worn tires with poor tread depth
- Too low tire pressure
- Ruts in the asphalt where water collects
How do you notice aquaplaning?
Signs that you are about to experience aquaplaning:
- Steering wheel suddenly feels light and loose
- Engine sounds like it is revving higher (less resistance)
- Car does not respond to steering movements
- You can feel the rear of the car starting to swing out
Theory exam for car
An English translation of the theory exam for taking a Norwegian driving license. The exam has a large number of questions, so you can try it over again several times.
How to reduce the risk
1. Check tires regularly
Legal tread depth is minimum 1.6 mm, but for good safety you should replace tires at 3 mm. Summer tires below 3 mm and winter tires below 4 mm provide poor water drainage.
2. Maintain correct tire pressure
Too low pressure increases contact area but reduces the tire's ability to push away water. Check pressure monthly.
3. Adjust speed
Aquaplaning usually occurs above 70-80 km/h, but can happen at lower speeds if conditions are poor. Reduce speed during heavy rain.
4. Avoid deep ruts
Wheel ruts in asphalt collect water. Try to drive outside the ruts when safe.
5. Keep good distance
On wet roads you need longer braking distance. Keep at least 3 seconds distance to the car ahead.
What to do if it happens?
If you experience aquaplaning:
- Do not brake or turn sharply - This can cause the car to spin
- Take foot off accelerator - Let car slow down naturally
- Keep steering wheel straight - Do not make sudden steering movements
- Wait until you regain grip - Usually only lasts seconds
When tires regain contact with the road, you get back control. Then you can carefully steer and brake as normal.
Prevention is key
Most aquaplaning accidents can be avoided by:
- Reducing speed during heavy rain
- Having good tires with sufficient tread
- Being extra attentive in curves and at large puddles
- Not making sudden maneuvers on wet roads
Remember: It only takes seconds to drive through a puddle, but braking distance on wet roads can be twice as long as on dry roads. Always adjust speed to conditions.