The Coney Island subway terminal at Stillwell Avenue will be solar powered via a new roof. The station is undergoing a $283 million renovation project, and the roof will be ready in April 2005. The roof is expected to generate about 15% of the power for the station (but not the trains or signals) and help cut down on carbon dioxide emissions. There are 2,600 with "photovoltaic cells that absorb the sun's rays and convert them into renewable energy for light" and roof, at 76,000 square feet, is the largest in the country at a transit facility. The Stillwell renovation also will give commuters a chance to take the F, D, Q, and W trains on its eight tracks starting in May 2004 - currently only the W goes there.