CNN: Work begins on nation's largest mass transit project

From CNN:

The largest mass transit project in the country got under way Monday with the help of federal stimulus dollars, as public officials broke ground on a second passenger rail tunnel beneath the Hudson River.  Work on the country's largest mass transit project began Monday.  The new tunnel will link New Jersey with New York and eventually will double capacity on the nation's busiest rail corridor, running from Washington to Boston, Massachusetts, officials said.  Officials participated in the groundbreaking for the $8.7 billion project as commuter trains passed behind them in North Bergen, New Jersey, before entering the existing train tunnel, which went into operation in 1908.