Minimum speed 45: Why do some highways post minimum speed signs?
Correct answer: To help traffic keep moving smoothly.
Answer options
ATo help traffic keep moving smoothly. Correct
BTo judge whether traffic signals will be needed later.
CTo guarantee the safety of pedestrians.
Why
Vehicles moving far below the speed of everyone else disrupt the flow and invite rear-end crashes and risky passing, so some highways set a minimum speed to keep traffic moving evenly.