Disused rail lines are a RoW life raft for American cities. I cycle in a very hilly area and rail trails and trails along waterways have nicely mild grades compared to the rest of the state. Electric trams could easily co-exist with a cycle path next to them. I just hope we’re smart enough to recognize these chunks of land as a gift from the past and not give them up or develop them inappropriately (aka freeway expansions)