Starting from Stamford all the trains are express to GCS
Yes it is
Yes , absolutely I have done that many a times
The previous response is just wrong. Of course, "subway" is in New York City, but MetroNorth commuter railroad provides generally 2 trains an hour from Stamford to Harlem (125th St) and Grand Central (42nd St) in New York City. SOME express trains go directly from Stamford to NYC, but others make intermediate stops. You can connect to the "subway" paying a separate fare at both 125th St and Grand Central.
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