Under ideal conditions, what is the minimum total stopping distance shown for a vehicle traveling 55 mph?
Correct answer: D – About 419 feet
At 55 mph, the general stopping-distance example shows a minimum total distance of approximately 419 feet under ideal conditions. This includes perception, reaction, and braking distance. Poor traction, driver condition, or vehicle problems can increase the distance needed.
Source: New York State Commercial Driver’s Manual — § 2.6.1, “Stopping Distance”

