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superhighway
I did two or three posts on trains.The data was from Hoerner.If you can chase those down with the search engine,there might be some preliminary info to get you started.-------- Cd0.02 would be a passenger airliner wing.That would be hard to pull off.--------- The rail system,cross-ties,girders,and pylons would still create some ground-effect interference.----------- An exposed underside would aggravate lift,especially with a truly "light" rail system and the velocities you're talking about.---------- Since power varies as the cube of velocity,I believe there are already concessions made to speed,as there becomes a point where the cost of some velocity can not be justified in fares.---------- Since you are describing an unknown quantity,there won't be any real empirical data to guide you.--------- You may want to study roller-coasters.Coaster-based systems can operate mostly on gravity.Empty"trains" lifted with renewable energy.Passengers ride up to load from elevators run on renewable energy.Any 34-story building (there are over 55 cities in N.America with them) can provide the base structure which receives the add-ons.Once loaded,the cars accelerate to over 100 mph on gravitational pull alone,and can coast great distances when aero-maximized.Rolling resistance is already the lowest known,short of Mag-lev.The infrastructure requires a very small footprint across the landscape.Many possibilities.
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