Hydroplaning — Connecticut Permit Test

Hydroplaning on the Connecticut permit test — 5 rules, each with the reason behind it and a question on it while it is fresh.

The rules

On a wet road most tires have good traction up to about 35 mph, and above that they start to ride up on the water.

The tread can only pump so much water a second. Past that speed the water wins and the tire floats.

When it is raining or the road is wet, most tires have good traction up to about 35 mph.
Connecticut Driver's Manual, p.25

Bald or badly worn tires lose traction at much lower speeds, and in heavy rain tires can lose all traction with the road.

Worn tread has nowhere to put the water, so hydroplaning starts at a speed that felt safe last year.

Bald or badly worn tires will lose traction at much lower speeds.
Connecticut Driver's Manual, p.25

The best way to keep from hydroplaning is to slow down in the rain or when the road is wet.

Hydroplaning is a speed problem before it is a tire problem, and speed is the part you control at the time.

The best way to keep from hydroplaning is to slow down in the rain or when the road is wet.
Connecticut Driver's Manual, p.25

If it feels as though your tires have lost traction, ease your foot off the gas pedal and keep the steering wheel straight.

A floating tire is not steering. Turning the wheel only means it bites sideways when it finally grips again.

If it feels like your tires have lost traction with the surface of the road, you should: • Ease your foot off the gas pedal.
Connecticut Driver's Manual, p.25

Do not try to stop or turn until your tires are gripping the road again.

Every input you make while floating arrives all at once at the moment grip returns.

Do not try to stop or turn until your tires are gripping the road again.
Connecticut Driver's Manual, p.25

On the test

Up to about what speed do most tires keep good traction on a wet road?

35 mph. The tread can only pump so much water a second. Past that speed the water wins and the tire floats. Connecticut Driver's Manual, p.25: “When it is raining or the road is wet, most tires have good traction up to about 35 mph.”

How this works

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Where these come from

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