DGT DGT Speed Management & Distance Control 1 — Questions and Answers
Question 1: What is the minimum safe following distance recommended when driving at highway speeds in normal conditions?
- 1 second
- 2 seconds
- 3 seconds (Correct answer)
- 5 seconds
Correct answer: 3 seconds
A minimum 3-second following distance is recommended at highway speeds to allow adequate reaction and braking time.
Question 2: If you are driving at 60 mph, approximately how many feet does your vehicle travel per second?
- 44 feet
- 60 feet
- 88 feet (Correct answer)
- 110 feet
Correct answer: 88 feet
At 60 mph, a vehicle travels approximately 88 feet per second, which is why adequate following distance is critical.
Question 3: When should you increase your following distance beyond the standard 3-second rule?
- When driving on a sunny day
- When following a motorcycle
- When roads are wet or visibility is reduced (Correct answer)
- When driving in light traffic
Correct answer: When roads are wet or visibility is reduced
In wet or low-visibility conditions, stopping distances increase significantly, requiring a greater following distance.
Question 4: What is the primary reason speed limits are lower in school zones?
- To reduce fuel consumption
- To allow children time to cross safely and give drivers reaction time (Correct answer)
- To protect road surface wear
- To reduce noise for nearby residents
Correct answer: To allow children time to cross safely and give drivers reaction time
Reduced speed limits in school zones exist because children are unpredictable pedestrians and lower speeds give drivers more reaction time.
Question 5: What is the general speed limit on a rural two-lane road in most U.S. states when no posted sign is visible?
- 35 mph
- 45 mph
- 55 mph (Correct answer)
- 65 mph
Correct answer: 55 mph
Most U.S. states set a default speed limit of 55 mph on rural two-lane undivided highways when no sign is posted.
Question 6: Which factor does NOT directly affect your total stopping distance?
- Reaction time
- Vehicle weight
- Tire condition
- Vehicle color (Correct answer)
Correct answer: Vehicle color
Vehicle color has no effect on stopping distance; reaction time, weight, and tire condition all influence how quickly a vehicle stops.
DGT DGT Speed Management & Distance Control 1
What is the minimum safe following distance recommended when driving at highway speeds in normal conditions?