That's what motorized bikes are.
Loud, obnoxious (waaah waaah) mopeds can be heard passing here 24/7. In fact, it's 4 am and I'm listening to one blasting thru the nearby neighborhood right now. Out of 40,000 mopeds here, 15,000 look and sound annoyingly similar.
Out of 100,000 bicycles here, maybe there's 80 Happy Time motorized bicycles here, and 20 other MB's.
They're all superheroes.