What does the basic speed law require?

• A. Drive at posted limit at all times.
• B. Drive at a safe speed for conditions at all times, regardless of posted limits.
• C. Drive at the speed of the vehicle in front.
• D. Never exceed 55 mph.

Answer: (B)

You must drive at a safe speed for conditions at all times, regardless of posted speed limits. This means adjusting your speed to weather, visibility, road surface, curve severity, and traffic so you can stop in time and maintain control. The posted limit is the maximum you may drive, not a guarantee of safety; in rain, fog, icy pavement, or heavy traffic, you may need to slow well below the limit. Mirroring the vehicle in front isn’t always safe, since the leading car may be going too fast for the current conditions for you. And speed limits vary by road and area, so there isn’t a single universal cap that always applies—the safe speed depends on the specific situation.