I live in Berlin and lived in Zurich and SF. I think SF is good for US standards. In Zurich you have fewer bike lanes than in SF, but the drivers are more aware

I live in Berlin and lived in Zurich and SF. I think SF is good for US standards. In Zurich you have fewer bike lanes than in SF, but the drivers are more aware of cyclists so I felt safer. Berlin is investing a lot into biking infrastructure and I feel like there are great bike lanes for almost everyone you want to go (at least in the neighborhoods I go around). Of course, Amsterdam is another ball game :-)