The second part of Metrorail's extension from Falls Church to Dulles International Airport and Loudoun County could cost as much as $1.3 billion more than original estimates, which may mean higher rates for people who use the Dulles Toll Road. The new estimate was provided Wednesday to members of the Metropolitan Washington Airports Authority, which is overseeing construction. The first phase is costing $2.75 billion, the authority said. Early estimates had placed costs of the second phase in the same range. The new price range increases the cost by at least $690 million and potentially twice as much. The plan...
