Opening doors

[Joe 781]

when you stop at a station where not all the cars platform, how does the train know to only open X amount of doors? does the conductor have to tell it to only open say the first five cars, or is there some sort of sensor that figures all this out?

[SubwayGuy 2,322]

There are only two stations where not all the cars platform - South Ferry and 145/Lenox .

 

Trains are wired so The C/R opens half the train at a time - the part behind him is one solid "unit" the part in front same. The two Short stations are both five IRT cars length so running a 10 car train he just opens the front five.

[Joe 781]

ah, that makes sense, thanks for explaining

[metsfan 2]

And, often if the front cars have no in/out activity & the back still has people entering and exiting he/she can close the front & keep the back open etc.

 

- Andy

[7LineFan 256]

And, often if the front cars have no in/out activity & the back still has people entering and exiting he/she can close the front & keep the back open etc.

 

- Andy

 

But don't they close the back first, all the time?

[PATCOman 196]

Most of the time. One time I saw a c/r attempt to close the rear first, but there were still people going in/ out, so the c/r closed the front before the rear.