A proposed 1947 remake of the NYNH&H's Westchester Yard? Sheesh! The New Haven's Westchester Yard, primarily an LCL facility, was essentially closed circa1936. The former six-track branch line was, by then, down to four tracks, with only two tracks crossing Eastchester Creek.
Oh, as nice as it might have been desired, there never was a rail connection between the IRT's Westchester Yard and the NH's Westchester Yard. The IRT/NH rail connection originally was at Harlem River via the 2nd Ave. El, and was subsequently relocated to the former-NYW&B connection at West Farms Junction. Many an IRT car, including the 1964 World's Fair cars, were delivered through that connection.
Ex-NYNH&H SS Opr