Dave,

The river was destined to take this section of the highway and the ADOT rebuilt the road to the new track. The old section of road is still there, you could pull up there and park but it is no longer the main through way.

I drove this section twice this summer and the OSM navigation worked perfectly. Before I made my edit it would want you to make U turn and drive the section that is now cut off.

Thanks for asking!

Will