A. Is the posted speed limit.
B. Is lower than the posted speed limit.
C. Depends on the weather and road conditions.
D. Depends on the mechanical skill of the driver.
Depends on the weather and road conditions.
It may be necessary to drive below the posted speed limit in hazardous conditions such as when the roads are slippery or when the weather is foggy.
The safest speed to drive on a rural highway is 55 mph when there’s no limit posted on the interstate. But if it is on a residential road, a safe speed is 10 and 25 mph.