In Alaska, speed limits in some rural areas may be 65 mph, but drivers are warned that frost heaves and moose pose serious hazards. There may not be guardrails where drivers from out of state might expect them. Although most paved roads have wide shoulders, there are also stretches were shoulders are narrow or nonexistent. Winter driving -- between October and April, depending on the location -- brings its own hazards of ice, snow and wind although the state Department of Transportation does a pretty good job of clearing the roads.
It is actually unknown by many but no one is allowed to drive on Alaskan Interstates. The reason being .....there are no Interstates in Alaska. There is only one road that links Alaska with the Lower 48 and that runs over 1,000 miles through Canada.
Generally, the average car speed is whatever the speed limit is. While some go over and under, others stay right on the speed limit, making it the average.
the posted speed limit
The speed limit is 55mph.
The normal speed limit on the highway.
Montana
55 on the highway, and 30 in the city.
It all depends on the type of highway and the speed limit signs.
Whatever the posted speed limit is.
kilometers
The Autobahn
In the US, the maximum speed on an interstate highway is 70. Until recently, there were a couple of stretches of highway that were limitless.
The speed limit on most highways in the US is 65 mph. Depending on conditions, most traffic does 70 to 75 mph.