[ivenkys]

"Apparently the state-of-the-art is to have buttons for every floor to be outside the car, in the lobby." - Not sure if this is state-of-the-art but i used such a system in Singapore 10-12 years ago and it works very well. The only flaw is the lone-ranger problem who has to go to a floor no one else has to. In peak hours, such a person may/will have to wait for a much longer-than-usual amount of time.