Location: I-10 at the Arizona Line, Blythe As we approach the Arizona line, we’ll get advance signage for the first I-10 Arizona exit. This sign was clearly erected by ADOT. Location: I-10 at the Arizona Line, Blythe Welcome to Arizona! I-10 continues across the state through the population centers of Phoenix and Tucson. E to … Continue reading Interstate 10, US-95 to AZ State Line