You want me to do what?

I'm a big fan of public transit, especially the rapid transit variety, like Vancouver's skytrain. Last year, partly in preparation for the 2010 Olympics, we were blessed with a brand new line from downtown to the airport and to Richmond, where I live. It's called skytrain because the train runs on a track that's elevated above ground. I brought my bike along one day and bikes aren't allowed on the escalators or stairs, so you must take the elevator. Seemed simple enough, until I got inside and was greeted with a set of buttons I just could not figure out!

I thought that these might be imported elevators that still have the buttons in the local language, so maybe C means up and S means down??

Ended up pushing both C and S, ignoring the 4 buttons, each with double arrows that seemed to be twice too many ways of opening and closing the doors.

Doors close. Rumble, rumble. Doors open, but instead of seeing a platform of people, I just see another elevator across from me. So, I go across and enter, expecting to see another S and C. But no, now I have 3 buttons: C, CR and T !! (still ignoring the 4 buttons that seem to open/close the door)

Yowzahs! So, I push all 3 and up it goes.

When I got off at my destination, I unlocked the mystery of the buttons, thanks to a kind soul who handwrote the meaning of the buttons:
S = Street level
C = Concourse level
CR = Concourse level, Rear door
T = Train level

No indication of why there are 2 sets of door open/door close buttons.

Sigh.