His bike blog is very descriptive:
"Part 2 was the 19-mile stretch on 37 nicknamed Blood Alley. It was a bit precarious on 3 small bridges of about 100 yards each (one especially because of a weird turn). On these, there were no shoulders and with the auto speed limit 55mph, we pedaled as fast as we could to get off. Besides those parts, there were wide shoulders, a now divided highway, and speed dips which made it fine as long as you stay as far right as possible"