Imagine trains capable of 500 km/h (310 mph) that would literally whisk you from Chicago to Minneapolis-Saint Paul in under two hours; or San Francisco to Los Angeles in under 90 minutes; or Jacksonville to Miami in under two hours; or Dallas to Houston in just under 90 minutes. It'll would essentially obselete air travel on any corridor where maglev lines are built. At 310 mph maximum speeds, suddenly high-speed train travel over distances up to 800 miles between cities becomes really viable.