All I can say is that the reality is that they come right at me on the bike path on the wrong side of the rode at 16+ mph. Every single time I go biking.
I can understand. When vehicles of different cruising speeds share a roadway, the faster ones are perpetually passing. So always oncoming straight at you. It gets worse with increasing density - instead of passing occasionally, now you're passing pretty much all the time.
Its a hard problem to solve.