Safe driving
⏱ ~3-min readAceMark Guide
What this topic is really about
When parking uphill with a curb, turning the wheels away from the curb ensures that if the vehicle rolls backward, the back of the front tire will catch against the curb and stop the car. Turning wheels toward the curb is incorrect because it would allow the vehicle to roll back into traffic.
Hydroplaning occurs when a vehicle drives fast on wet roads, causing a layer of water to build up between the tires and the road surface and lose traction. This cannot happen on dry roads or when stopped, as water and vehicle motion are required for the tires to lose contact.
See the mechanism
Hydroplaning occurs when a vehicle drives fast on wet roads, causing a layer of water to build up between the tires and the road surface and lose traction. A diagram for this topic isn't available yet — the worked example below walks the same reasoning step by step.
An exam-style question, fully explained
Hydroplaning is most likely when:
- Identify what the question tests: Hydroplaning is most likely when:.
- Hydroplaning occurs when a vehicle drives fast on wet roads, causing a layer of water to build up between the tires and the road surface and lose traction.
- This cannot happen on dry roads or when stopped, as water and vehicle motion are required for the tires to lose contact.
Traps the examiner sets
- Option A is incorrect because a one-second gap does not provide enough stopping distance to prevent a collision in an emergency.
- Option A is incorrect because stopping at the end of an on-ramp is extremely dangerous and can cause rear-end collisions.
- Turning wheels toward the curb is incorrect because it would allow the vehicle to roll back into traffic.
Test your recall
Answer each from memory — you'll see instantly whether you're right and why.
Run a focused 10-question mini-mock on Safe driving and see it stick.
Practice more of this topic →