The railroads didn’t only run on the rails but also created intercity bus line, motor carrier, airline and marine subsidiaries, to better serve customers and investors alike. In some instances they were forced to terminate some of these services due to anti-trust laws. Much more liberal was Canada where Canadian Pacific was permitted to “Span the World!” (even hotels!) Other Canadian railways followed suit, Canadian National and Ontairo Northland, for example.
In the US, didn’t Jim Hill’s Great Northern build and operate the hotel resort that served Glacier National Park? Other than the excellent book by the late Duane Kaufman on Rio Grande Motor Way (bus and truck) have their been any other publications on the subject of non-rail subsidiaries operated by America’s railroads?