Again we're getting way off topic here, but if you go back and look at Connecticut's decision to use the NH logo and paint scheme on locomotives (and that's all it's used on) it had to do with honoring the fact the NYNH&H had been a Connecticut corporation with its headquarters in New Haven. I think it was Penn Central that decided to call the former New Haven suburban passenger service "the New Haven Line."
But realistically I think the decision to use the McGinnis livery had even more to do with the fact you had some railfans in ConnDOT. When the agency was having some FL-9s rebuilt they thought it would be cool to paint them in the New Haven livery. They justified it as a way of honoring a Connecticut-based corporation that had a long history in that state. It wasn't really what I would call a decision to brand the service, not in any real marketing sense. They had to decide on some paint scheme, they couldn't run them in primer.
As long as Grand Central Terminal stands I believe the name New York Central won't be forgotten.
Btw the 'plan' to halt passenger service at New Rochelle originated with Pat McGinnis in 1956 as a way of protesting New York City taxes and the fact west of there the railroad was very expensive to operate. It was revived in 1965 when the NH trustees were concluding there was no way to achieve an income-based reorganization.
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