Last weekend I did this stretch:
https://www.google.com/maps/@43.4821...7i13312!8i6656
Doesn't look bad here, 'cuz the map is old. It's way more cracked now. 55mph road, but with little traffic. This section is a 13mph grind going up and 20+ coming down. I spent more time dodging road cracks than pedaling...
Better shot:
https://www.google.com/maps/@43.4723...7i13312!8i6656