The A1A ocean drive route I ride is full of cyclists at almost any given time on weekends. Maybe 1 out of 5 who pass me signal they are about to pass with an "on your left" holler. Do they think I have super human hearing or eyes in the back of my head? Do they not realize that cyclists crash into each other and it could be pretty nasty? The ones that do this are on their fast road bikes all decked out in the latest gear pushing 20mph so I assume they're regular riders. What's the deal here? They piss me off more than motorists because they're supposedly cyclists. Now I yell at them to please signal.