This is fun. Hunter Bachrach posted this video of driving on an older section of Route 66 in western Oklahoma.
This likely is the section east of Erick, that used to be part of a four-lane highway.
I suspect a local periodically takes a Brush Hog or snowplow to it. Every so often, it becomes nearly impassable because of fallen tree limbs and brush, then it’s open again.
The chatter in the video is worth hearing. His companion says: “The current (66) is over there, but we’re over here.” Hunter replies: “‘Cause it’s cooler over here.”