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 Grand Central's Hidden Sub-Basement Has A 102-Year-Old Compu 
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Joined: Wed Jan 16, 2013 2:33 am
Posts: 165
Video: Grand Central's Hidden Sub-Basement Has A 102-Year-Old Computer

http://gothamist.com/2015/10/15/grand_c ... hp#photo-1


Fri Oct 16, 2015 5:37 pm
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Joined: Wed Jan 16, 2013 2:33 am
Posts: 165
Another look at it here:

http://hackaday.com/2015/10/17/retrotec ... -computer/


Mon Oct 19, 2015 2:57 am
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Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1780
There's an interesting long article on the New York subway's signalling, and a video too.
https://www.youtube.com/watch?v=Mjx3S3UjmnA
It seems that safety is maintained by interlocking - whether mechanical or 300,000 relays depends on which part of the system you look at.

There's a simulator for Windows or OSX here:
http://www.nycsubway.org/wiki/NXSYS,_Si ... _Simulator

Here's the long article:
http://www.theatlantic.com/technology/a ... re/415152/


Sat Nov 14, 2015 2:43 pm
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