Under ideal conditions, what is the minimum total stopping distance at 55 mph?
Correct answer: C – 419 feet
The New York CDL manual lists a minimum total stopping distance of 419 feet at 55 mph under ideal conditions. This consists of about 142 feet of perception distance, 61 feet of reaction distance, and 216 feet of braking distance. Poor visibility, slippery pavement, worn brakes, or other adverse conditions can increase the distance needed.
Source: New York State Commercial Driver’s Manual — § 2.6.1, “Stopping Distance”

