Last Driven May 2014 AMP: 0 Location: I-90 and State Line Rd, State Line, Kootenai Cty Welcome to Idaho! No Milepost markers as that information is unavailable outside of Washington. AMP: 0 Location: I-90 and State Line Rd, State Line, Kootenai Cty I-90 is the Captain John Mullan Highway to Coeur d’Alene AMP: 1 Location: … Continue reading Interstate 90, WA State Line to I-90 Bus