That intersection[1] works so well without signs by accident not by design, since it's in the most central and densest part of the city with lots of cafes that's crawling with students and cyclists coming from every direction so drivers have no choice but to drive slowly and carefully. They can't replicate this in other parts outside the city center where cars pick up speed.

[1]https://maps.app.goo.gl/WeN2Q2MhVdA8Y1RK8