After spending a few months commuting to/from work via electric scooter (https://scoot.co), it became really apparent just how many drivers are constantly driving dangerously. My biggest pet peeve was the fact that apparently 95% of drivers don't know how to use turn signals, either not using them at all, or only flicking them on once they've already begun turning. And in those months of scooting, I literally only ever saw 1 car use its turn signal before exiting the rotary.