Editing Interstate 40 (section)

===Arizona===
[[File:I-40 west near Flagstaff.jpg|thumb|I-40 westbound heading toward Flagstaff]]
{{Main|Interstate 40 in Arizona}}
I-40 is a main route to the South Rim of the [[Grand Canyon]], with the exits leading into [[Grand Canyon National Park]] in [[Williams, Arizona|Williams]] and Flagstaff. I-40 covers {{convert|359|mi|km}} in Arizona. Just west of exit&nbsp;190, west of Flagstaff, is its highest elevation along I-40 in the US, as the road crosses just over {{convert|7330|ft|m}} at the Arizona Divide near milepost 190. I-40 also passes through the [[Navajo Nation]], the largest Indian reservation in the US. Like California's segment, the highway is four lanes for the entirety of its length in the state.