Lawrence St Posted December 6, 2018 Share #1 Posted December 6, 2018 Was looking through you tube and found this. It seems to me like they test these announcements on a special built sign system located inside MTA head quarters and work out the bugs there before moving to installing them on the actual cars. I'd love to do a at-home project like this soon. Thoughts? Link to comment Share on other sites More sharing options...
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