Final answer:
The maximum speed for passenger vehicles on Virginia interstate highways, unless otherwise posted, is 70 miles per hour.
Step-by-step explanation:
The maximum speed for passenger vehicles on Virginia interstate highways, unless otherwise posted, is 70 miles per hour.
According to the Virginia Department of Transportation (VDOT), the default speed limit on Virginia interstates is 70 miles per hour unless a different speed limit is specifically posted. This means that unless you see a different speed limit sign, the maximum speed for passenger vehicles on Virginia interstates is 70 miles per hour.