vehicle stopping distance

• What is the stopping distance of a vehicle?

  Total distance from spotting obstruction to stop
• How does speed affect stopping distance?

  Greater speed results in greater stopping distance
• What are the two parts of stopping distance?

  Thinking distance and braking distance
• What is thinking distance?

  Distance traveled during driver's reaction time
• What is the typical reaction time range for drivers?

  0.2 to 0.9 seconds
• How can you measure a person's reaction time?

  Using a ruler drop test
• What factors can increase a driver's reaction time?

  Alcohol, drugs, and distractions
• How do wet or icy conditions affect braking distance?

  They reduce friction and increase braking distance
• What effect do worn tires have on braking distance?

  They increase braking distance due to reduced friction
• How do worn brakes affect braking distance?

  They increase braking distance
• What are the components of stopping distance?

  • Thinking distance
  • Braking distance
• What factors affect thinking distance?

  • Driver's reaction time
  • Alcohol and drugs
  • Distractions (e.g., mobile phone)
• What factors affect braking distance?

  • Wet or icy road conditions
  • Worn tires
  • Worn brakes
• What is the stopping distance for a typical family car at 30 mph?

  23 meters
• How many car lengths is 23 meters at 30 mph?

  Six car lengths
• What happens to stopping distance if the same braking force is applied at higher speeds?

  Stopping distance increases
• What is the relationship between reaction time and thinking distance?

  Longer reaction time increases thinking distance