Safe bicycle riding in Chatham County

I was on Hamlet Chapel Road a few months ago driving along at about 50 mph (speed limit is 55 mph) when I happened to notice what appeared to be a female “serious” bicycle rider on a side street. She was wearing the right clothes, helmet, had a bike, etc. Expecting her to stop at the stop sign, which is a basic traffic control device, I did not think much of it. Imagine my surprise when she did not even slow down but just ran the stop sign, pulling directly in front of me without even looking!