Thing with these tracks is that you know where they are and thus you can anticipate. Just as with the trams riding them: if you stay off the tracks the chance of being run over by a tram are quite close to zero. Cars however are different. These tend to sneak up on you or come out of dark street corner unexpectedly. Their agility, speed and mass make it a true killer... In short: trams are part of life in Amsterdam and the locals are used to them and their tracks. Overall the quality of the bike lanes in the Netherlands is excellent and exceeds by far what SF has now...