> In any commercial setting you don't have dangerous machinery and humans mixing. Sure you do, forklifts in a warehouse for one. An "absolute barrier" means ob

> In any commercial setting you don't have dangerous machinery and humans mixing. Sure you do, forklifts in a warehouse for one. An "absolute barrier" means obstructing pedestrians even when there is no one driving at that time and place. Accidents also happened back when horse and carriage were the norm too but it was for cars that campaigns were started to make streets an exclusive domain [0]. [0] http://99percentinvisible.org/episode/episode-76-the-modern-moloch/ http://99percentinvisible.org/episode/episode-76-the-modern-...