My office tower has 6 elevators. 3 transfer buses are coming in from the subway @ 8:50, around 120 people are coming trough the security gates and approaching the elevators more or less simultaneously. It takes me approx 20 minutes until i get to my floor every single morning, because only one elevator comes at a time and since i am a gentlemen, i usually let the ladies go first. Even more, you can call an elevator only when another went off, otherwise the full one won't move and will open it's doors instead. OTIS, i hate you.