Unfortunate damper on his professional racing career. Not many news details of this incident- I wonder if he was alone or with a group. NC-152 in Rowan County is a typical rural 2 lane road with no shoulder. Speed limit 55 mph, though some drivers will no doubt be faster. It's fairly straight and flat with good sight lines, so there should be no problem for an alert and competent driver seeing a cyclist. I hope Seth heals quickly.