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Discussion relating to the operations of MTA MetroNorth Railroad including west of Hudson operations and discussion of CtDOT sponsored rail operations such as Shore Line East and the Springfield to New Haven Hartford Line

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 #1397851  by SouthernRailway
 
I rode in a cab car on a Hudson Line train and noticed frequent beeping: usually 2 or 3 series of electronic beeps; sometimes more, but the last series would end quickly. The beeping occurred all along the route, including in Grand Central.

Curious what this is? I was in a Connecticut cab car with doors at each end- Charter Oak, I think.

Thanks.