Don’t forget Alaska. There are roads connecting the Yukon to Fairbanks and Anchorage, and the unpaved Dalton Highway connecting Fairbanks to the North Slope, but there are no roads connecting Fairbanks to the western part of the state at all. Most of the state and its towns and villages are accessible only via aircraft. There are no roads to Juneau, the state capital, for instance. Hawaii has an interstate on the island of Oahu, but Alaska has no interstate highways to speak of. It is a VERY undeveloped state.