The Speed Limit For Passenger Cars On Highways Numbered By This State Or The United States Is:

The answer is 70 mph. Rural interstate highways are located outside urban areas with a population of at least 50,000 people.

The following speed limit rules apply in these areas: Passenger vehicles may not exceed 70 miles per hour or the posted speed limit, Trucks that have a declared gross vehicle weight greater than 26,000 pounds may not exceed 65 miles per hour or the posted speed limit On a rural state divided highway, vehicles may not exceed 60 miles per hour or the posted speed limit.