Yesterday I was taking a water and snack break under a tree in the 91deg heat on a 53mi ride. A gentleman riding by looked down at me and asked, "are you alright??". I must have looked whuuped, even with my bike leaning against the tree (not on the ground), bottle sitting by my side and me reading my iphone for distraction from the moment. Otherwise, he was being the extra gentleman by asking. I got up and reassured him....maybe he is a physician, I dont know....and gave a kind word back to him.
Maybe there are those that zip on by because they have learned how to do this in their cars and makes it easier for them to ignore those who might be in need.