Highways in West-Canada and Alaska

For my own planning I collected the routes of highways in western Canada und Alaska in one map, which can be downloaded as GPX file.
Clicking on one of the routes in most cases opens a detailled description of "The Milepost" in a new browser-tab.
If there are highways missing or some of them are displayed in a wrong way, give me a message, so I can add or change them.