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Washington driving lesson · Managing Risk

Speed and space

A 3-minute lesson from the Washington 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
Managing Risk
Checkpoint questions
6
Source pages
157, 158, 159

Speed is the choice that makes every other mistake worse. Arriving late is better than not arriving at all. Posted limits are a ceiling for perfect conditions, and the space you keep around your car is what buys you time to react.

Excessive speed:

  • Reduces the effectiveness of seat belts
  • Limits your ability to visually scan for hazards
  • Reduces vehicle and traction control, especially in rain or snow
  • Creates longer stopping distances
  • Gives you less time to assess your path and make changes
  • Increases the severity of injuries in a crash
Handbook p. 157 ↗

Know the rule

Speed limits are the maximum legal speed under ideal conditions. Washington law also requires a speed that's safe for current conditions, so slow down when conditions are poor.

Handbook p. 158 ↗

Know the rule

You may drive below the speed limit, but exceeding it is illegal. You're responsible for driving at a safe speed regardless of the posted limit.

Handbook p. 158 ↗

Reduce your speed for:

  • Sharp curves or hills with limited visibility
  • Slippery roads from rain, snow, or ice
  • Areas with pedestrians, children, cyclists, or animals
  • Shopping centers, parking lots, and heavy foot traffic
  • Heavy traffic congestion
  • Narrow bridges and tunnels
  • Residential areas
Handbook p. 158 ↗

Know the rule

You can judge space by distance or time, and you must keep evaluating your position. It takes practice, which is why novice drivers are at greater risk.

Handbook p. 159 ↗
2 vehicle lengths

Minimum distance between you and the vehicle ahead when driving near other vehicles (at least twice your vehicle's length)

Handbook p. 159 ↗

Know the rule

Space around your vehicle gives you room to act and time to find an alternative path if there's a problem ahead.

Handbook p. 159 ↗

Put it into practice

You're on a 35 mph residential street lined with parked cars, and kids are playing in a yard. The limit is 35, but residential areas and children both call for a slower speed. Ease off and leave extra space.

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.

Which statement about speed limits matches the handbook?
  1. You may exceed the limit by 5 mph to pass
  2. You must always drive exactly at the limit
  3. You may drive below the limit, but exceeding it is illegal
  4. Posted limits are safe in any weather

Answer: You may drive below the limit, but exceeding it is illegal

You can drive below the speed limit, but exceeding it is illegal, and you must slow for poor conditions.

Handbook p. 158 ↗
How much space should you leave between your vehicle and the one ahead when driving near other vehicles?
  1. Half your vehicle's length
  2. Three times your vehicle's width
  3. At least two vehicle lengths
  4. Exactly one car length

Answer: At least two vehicle lengths

Leave a distance of at least twice the length of your vehicle between you and the vehicle ahead.

Handbook p. 159 ↗
How does excessive speed affect the effectiveness of your seat belt in a crash?
  1. It only matters for passengers, not drivers
  2. It reduces the seat belt's effectiveness
  3. It has no effect on seat belts
  4. It only matters in rollover crashes

Answer: It reduces the seat belt's effectiveness

Excessive speed reduces the effectiveness of seat belts, which are designed to protect at lower speeds.

Handbook p. 157 ↗
You are responsible for driving at a safe speed regardless of the posted speed limit.
  1. True
  2. False

Answer: True

You're responsible for always driving at a safe speed, regardless of the posted limit.

Handbook p. 158 ↗
Which of these is NOT a reason excessive speed increases risk, according to the handbook?
  1. It creates longer stopping distances
  2. It reduces vehicle and traction control
  3. It increases the severity of crash injuries
  4. It improves your hazard scanning

Answer: It improves your hazard scanning

Excessive speed actually limits your ability to visually scan for hazards, the opposite of improving it.

Handbook p. 157 ↗
Judging space by distance or time is a skill that takes time and practice, especially for novice drivers.
  1. True
  2. False

Answer: True

Judging space takes time and practice, which is part of why novice drivers face greater risk.

Handbook p. 159 ↗
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