From west to east:
Depew, Lancaster & Western between Depew and Lancaster, New York.
Rochester Southern between Greigsville and Groveland, New York.
Bath & Hammondsport between Wayland and South Corning, New York.
CSX Transportation between Oswego and Syracuse, New York.
New York, Susquehanna & Western between Syracuse, Utica, and Binghampton, New York.
Norfolk Southern between Binghampton, New York, and Wilkes-Barre, Pennsylvania.
Luzerne County Redevelopment Authority between Kingstown and Wilkes-Barre, Pennsylvania.
North Shore between Northumberland and Berwick, Pennsylvania.
Reading & Northern between Wilkes-Barre and Matins Creek, Pennsylvania.
Norfolk Southern between Easton and Hackettstown, New Jersey.
New Jersey Transit between Hackettstown, Gladstone, and Hoboken, New Jersey.
So Mr. Norman, quite a lot, actually. Well over 50%; however, most of it's no longer connected and is scattered among a bunch of owners. With the exception of the commuter lines in New Jersey and I guess the Reading & Northern, it's all branchline rather than mainline.
There is a site called "Mississippi Rails" that has google earth maps of various railroads. It's great to see what's still around and what's not. https://www.msrailroads.com/Google_earth.htm
Barbecuing in Chessie's backyard. Host of "Shortline's Rail News & Comment."