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It's not as big of a pipe dream as you might think.
Daley and a delegation of civic and business leaders leave for China Friday, where they will tour five cities in hopes of luring more overseas investment to Chicago.
The mayor says the fast train would be built without using city money, and be operated privately. The price would be comparable to London where travelers pay $25 for an express train from Heathrow Airport.
City Hall also will start soliciting information from engineers, architects and builders to gauge interest in the idea when Daley returns from China March 30.