The tram line has been open for about two years now, but people still have trouble remembering the tram has the right of way. Maybe this will help, the audible warning doesn't seem to be enough since many people have headphones (understandable, noise cancelling is a must if the city has any car traffic).
I wouldn't say this is for zombies or people who forget that the team has the right of way. This looks like an exit from a building, which leads directly over tram tracks with no sidewalk that ends or anything - to me, that's an accident waiting to happen. Sort of like if you would put a street there with no sidewalk in front of it, that would be similarly dangerous.