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Connecticut driving lesson · Signals, Emergencies & Crashes

Slippery roads, curves and hydroplaning

A 3-minute lesson from the Connecticut course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
3 minutes
Course unit
Signals, Emergencies & Crashes
Checkpoint questions
5
Source pages
27

Your only contact with the road is your tires. Rain, snow, ice, gravel and sharp curves all reduce grip, so you must slow down before you lose control — not after.

Know the rule

Grip depends on the type and condition of your tires and the road surface. You have less traction on gravel or dirt than on concrete or asphalt — slow down; stopping takes longer and skids are easier when turning.

Handbook p. 27 ↗

Know the rule

Slow down before entering a curve so you don't have to brake in it. Go too fast and the tires can't grip; braking in a curve can cause a skid.

Handbook p. 27 ↗

Know the rule

Slow down at the first sign of rain, snow or sleet.

Handbook p. 27 ↗

Adjusting speed for slippery roads

Adjusting speed for slippery roads
RoadWhat to do
Wet roadReduce speed by about 10 mph
Packed snowCut your speed in half
IceSlow to a crawl; avoid driving if at all possible
Handbook p. 27 ↗
Nov 15 – Apr 30

Dates studded tires are permitted in Connecticut

Handbook p. 27 ↗

Watch for slippery spots:

  • Shady spots on cold, wet days — they freeze first and dry out last
  • Bridges and overpasses — no earth underneath to insulate them, so they ice first
  • Ice near the freezing point — it becomes wet and more slippery
  • The first few minutes of rain on a hot day — oil rises from the asphalt
Handbook p. 27 ↗

Hydroplaning

When tires ride up on water like water skis as speed rises on a wet road; in heavy rain they can lose all traction.

Handbook p. 27 ↗
35 mph

Most tires have good traction on wet roads up to about this speed; bald tires lose it much sooner

Handbook p. 27 ↗

If your tires lose traction on water:

  • Ease your foot off the gas pedal
  • Keep the steering wheel straight; turn only in an emergency, and slowly
  • Don't try to stop or turn until the tires grip the road again
Handbook p. 27 ↗

Know the rule

At an intersection with an inoperative stop light, state law requires you to stop as though it were controlled by a stop sign.

Handbook p. 27 ↗

Put it into practice

It's 34°F and drizzling as you approach a bridge. Ice near freezing is wetter and more slippery, and bridges ice before other pavement. Slow down before the bridge and avoid sudden braking or steering on it.

Check your understanding

Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.

Studded tires are permitted in Connecticut at any time of year.
  1. True
  2. False

Answer: False

Studded tires are permitted in Connecticut only from November 15th through April 30th.

Handbook p. 27 ↗
On a wet road, by about how much should you reduce your speed?
  1. About 5 mph
  2. About 10 mph
  3. About 20 mph
  4. By half

Answer: About 10 mph

On a wet road you should reduce your speed by about 10 mph.

Handbook p. 27 ↗
How should you adjust your speed when driving on packed snow?
  1. Reduce it by about 10 mph
  2. Cut it in half
  3. Slow to a crawl
  4. Reduce it by about one-quarter

Answer: Cut it in half

On packed snow you should cut your speed in half; on ice, slow to a crawl.

Handbook p. 27 ↗
When the road is wet, most tires keep good traction up to about what speed before hydroplaning becomes a risk?
  1. 25 mph
  2. 35 mph
  3. 45 mph
  4. 55 mph

Answer: 35 mph

Most tires have good traction up to about 35 mph on wet roads; faster than that, they can start to ride up on the water.

Handbook p. 27 ↗
Bridges and overpasses can be icy even when other pavement is not.
  1. True
  2. False

Answer: True

Bridges have no earth underneath to insulate them, so they can be colder and icier than other roadways.

Handbook p. 27 ↗
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