Well, DC Metro Rail seems to be working OK for now, but recent problems with heat-warped rails, fires, power outages, and crumbling concrete platforms shored-up with lumber, doesn't bode well for the impending crush of commuters, desperate to escape $4plus-per-gallon fuel prices.
Metro officials are already whining about not being able to handle the load!

Happy Motoring (as long as you can afford it!), Mark

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DrDKW