Boston and Maine 2 Canadian Pacific 5 Chicago and North Western 3 Chicago Burlington & Quincy 2 Clinchfield 1 Conrail 9 CSX 2 Delaware and Hudson 3 Denver and Rio Grande Western 4 Frisco 3 Great Northern 4 Milwaukee Road 3 Minneapolis and St Louis 2 New York Central 3 Norfolk and Western 9 Norfolk Southern 6 Northern Pacific 2 Penn Central 4 Pennsylvania 10 Pere Marquette 3 Reading & Northern 1 Rio Grande 3 Santa Fe 14 Seaboard 2 Soo Line 2 Southern 2 Southern Pacific 4 St. Lawrence & Atlantic 3 Union Pacific 8 Western Pacific 2