Yeah, but no one knows how much of the remaining trip is not on the interstate, just the next exit, me thinks @AZJeeper and @KL14 were taking that into account...Nobody in AZ drives the posted speed limit. I've been going 75 in a 65 zone and get passed by an AZ trooper doing 80+ (no red lights & siren) many times. This is for over 20 years!