Eh, Google Maps hasn't been to the area since 2008 and the road has been drastically widened and resurfaced multiple times, but at least they managed to capture a Jaguar XKR.

Those dirt shoulders are not there anymore. It's either grass or concrete.
Why are you turning left on a highway? What?
Our really big highways are usually referred to as interstates (comparable to an autobahn type road for you Europe dwellers). Routes and highways tend to be smaller here. This road is referred interchangeably as a route and a highway, but I'm pretty sure the technical name for it is "Missouri Highway [numbers here]".