Amtrak's Northeast Corridor including their line from Philly to Harrisburg (former PRR , ex-PC) still runs 11000VAC 25 cycles in their catenary. The former NY Connecting RR (Hell Gate bridge route) including the former New Haven RR"s Harlem River branch also using
11000VAC 25 cycle power in the cat. The change over to higher voltage and 60 cycles is before New Rochelle Jct where the branch meets the former NH (now Metro-North ) main from GCT. Metro-North as well as Amtrak's main from New Haven to Boston is 60 cycles.I believe the power lines from the falls crossing over from Canada to the US by the Peace Bridge is still 25 cycles. Who in Buffalo is still using it, I don't know.
Howard S. Wharton Fire Safety Technician Occupational and Environmental Safety Services State University of New York at Buffalo