O.K. I can't resist. Highway 395 goes from Mexico to Canada, border to border. But it is not an Interstate because roads do cross it and there are stoplights. If you've ever driven from LA to Lake Tahoe on the eastern side of the Sierra Nevada, you've been on it.
cool
Drivin' Artie

History is easy once you've lived it. - Duncan MacLeod
Writing history is easy once you've lived it. - Artemis