Hydroplaning — New Hampshire Permit Test

Hydroplaning on the New Hampshire permit test — 3 rules, each with the reason behind it and a question on it while it is fresh.

The rules

Hydroplaning occurs when the steering tires start to ride up on pooled water, similar to the action of water skis.

The tire is no longer touching the road at all, so steering and braking do nothing until it comes back down.

Hydroplaning occurs when the steering tires start to ride up on any pooled water, similar to the action of water skis.
New Hampshire Driver's Manual, p.17

The best way to avoid traction loss from hydroplaning is to slow down in the rain or when the road is wet with pooled water.

Hydroplaning depends on speed more than anything else, so slowing is the one thing that actually prevents it.

The best way to avoid traction loss from hydroplaning is to slow down in the rain or when the road is wet with pooled water or water puddles.
New Hampshire Driver's Manual, p.17

To help prevent hydroplaning a driver should make sure the tires have good tread depth and are inflated to the proper pressure.

Tread is what gives water somewhere to go. Worn tires take the water with them instead of pushing it aside.

should ensure that the tires on the vehicle have good tread depth, and are inflated to the proper pressure.
New Hampshire Driver's Manual, p.18

On the test

What is hydroplaning?

The steering tires riding up on pooled water. The tire is no longer touching the road at all, so steering and braking do nothing until it comes back down. New Hampshire Driver's Manual, p.17: “Hydroplaning occurs when the steering tires start to ride up on any pooled water, similar to the action of water skis.”

How this works

Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.

You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.

Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.

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Where these come from

Every rule here is checked against New Hampshire Driver's Manual, published by the New Hampshire Division of Motor Vehicles, and against the state code itself. Last checked 2026-09-16.