After 140 years of continuous service, the railroad between Chicago and San Franscisco is visible on Openbusmap:

http://www.openbusmap.org/?zoom=4&lat=38.32982&lon=-102.78337&layers=BT

Hopefully, Openbusmap will encourage mappers to add new rail and bus lines as relations (type=route, route=bus/rail/subway/tram/trolleybus, ref=99, network=XXX).