Interesting subject.
Shanghai Maglev Train - Wikipedia, the free encyclopedia
Non-contact rail is already in operation. The Shanghai Maglev link is only 30.5klms long, therefore the top speed is wound back to maximum normal operation speed of 431 km/h [268 mph].
Transrapid, the German designers of this technology have demonstrated a normal operating speed on long distance sections of over 500km/h [310+ mph]
Transrapid have also proven how smooth and safe this form of transport is.
When you factor in the 'zero speed' [before airbourne on course, and after landing/wheels on] component of air travel, the relative difference in 'cruise' speed becomes small when considering the overall.
To build, big bucks even in China, over the life of the service, and all other factors taken into account, you get the picture
