Under ideal conditions, what minimum total stopping distance does the manual give for a vehicle traveling at 55 mph?
Correct answer: C – 419 feet
The Vermont manual uses 142 feet of perception distance, 61 feet of reaction distance, and about 216 feet of braking distance at 55 mph. Together, these figures produce a minimum total stopping distance of 419 feet under ideal conditions. Poor traction, brake condition, visibility, or driver condition can increase the distance.
Source: Vermont Commercial Driver’s License Manual — § 2.6.1, “Stopping Distance”

