Janie... that US ends website is amazing! I could get lost in it for hours.... and adding in Google Earth one can actually 'drive' most of those places.

In 1975, I drove US 50 from Wichita to Washington DC... pretty easy drive-- until 1/2 mile inside W. Virginia- then *whoosh*... up and down little & big hills and sharp curves for hours, it seemed. I was supposed to arrive at a friend's place in Maryland for supper, but the 'interesting' topography thought otherwise.
I was heading down one steep hill, looking ahead to the climb going up the next hill where they had added a lane for 'slow moving vehicles'.... like mining trucks... when 2 very large, fully loaded trucks pulled out of a road at the bottom, took BOTH the regular lane and the passing lane, and proceeded to 'drag race' up the hill at ...oh... maybe 5 MPH. I was behind them for 20-30 minutes with no place to pass.
My friends had supper ready for me when I arrived about 2 hours late.

Yep.. them 2 lane roads sure are interesting...