Vision Zero rules are that you either need physical separation or a speed limit of 30 km/h. 30 km/h is approximately the threshold where the vast majority of

Vision Zero rules are that you either need physical separation or a speed limit of 30 km/h. 30 km/h is approximately the threshold where the vast majority of vehicle-pedestrian collisions aren't fatal. They've chosen to lower the speed limit rather than add bollards.