I was thinking about this the other day. I’m the furthest thing from an engineer but I’m confused as to why there are no alternatives that don’t involve making the trains stop at the same place every time. Like what about a barrier that raises up from within the platform and lowers when the train pulls in? Or like a garage door style system where it pulls down in front of you and raises when the train pulls in? Having doors that open just seems like a complicated option.