New York City Mayor Michael Bloomberg says he hopes the city's subway system will be extended to New Jersey "in somebody's lifetime."

Bloomberg was responding Tuesday to comments by the chief of the city's subways, who said it simply would cost too much. Bloomberg's administration pitched the concept of extending the No. 7 train to the Garden State in 2010.

Metropolitan Transportation Authority Chairman Joseph Lhota told business leaders he couldn't see extending the system underneath the Hudson River "in our lifetime" or "anybody's lifetime."

Lhota said the MTA would have to have yards in New Jersey and that there would be "pricing issues."

Bloomberg admitted it was "hard to see" how extending the subway to Jersey could be funded.

A subway line running under the river could cost billions.

(Copyright 2012 by The Associated Press. All Rights Reserved.)