Are there any public transportation railroads, railways and street car lines that run without government financial subsidies? I cannot think of any that could exist without federal / state / local government subsidies.
Without government subsidies, there would be no public passenger trail transportation, only rail freight haulage.
That is because hauling people is NOT profitable! No rail system on planet Earth hauls people at a profit.
I think there needs to be a distinction between public rail transportation, which will be subsidized in some way if it is truly public, because if it is government run/owned then it receives by its very nature public funding and support for its construction, infrastructure, and operation aside from any passenger ride fees. Any of our metro subways or commuter rail service fits this bill, New York, Washington, Boston, Chicago, tri-rail etc. the list goes on and on.
For private passenger services, not counting tourism or scenic railroads, there are probably no established ones in the US. This might change however here in South Florida. All Aboard Florida, a subsidiary of the Florida East Coast railroad is trying their hand at passenger service with Bright Line and now Virgin has partnered with them so they are becoming rebranded as Virgin trains USA.
We will see how it goes. I've ridden bright line and it is nice, but it remains to be seen whether history will show it to be a short term novelty or a long term profitable venture, or ends up becoming a government takeover which is unlikely as the lines, facilities, and equipment are owned by Florida East Coast RR and Virgin.
Below are some long reads but explains the train. Some have started calling it the Darwin Express here in South Florida because in its very short time it has had several pedestrian and vehicles collisions at crossings; some intentional suicides by train; some accidental. It is a high speed train and people misjudge a 85 mph train versus what they are used to in terms of speed for Florida East Coast freight trains they are used to seeing on that line. The line runs through some very congested downtown areas en-route from West Palm Beach to Ft. Lauderdale and then Miami. It has plans to expand to Orlando, then possibly to Tampa, and later maybe even a spur to Jacksonville.
https://en.wikipedia.org/wiki/Brightline
http://www.govtech.com/fs/infr...-Private-Gamble.html
https://www.sun-sentinel.com/n...-20181116-story.html