train, who endure the oldest and most battered subway cars in the entire system, will have to continue to do so for longer than planned. The manufacturer of a new model of subway car that was picked to replace those on the line has encountered problems with its prototypes. Bombardier discovered cracks in the prototype’s steel undercarriage and walls, Metropolitan Transportation Authority officials said Monday. The MTA had expected all 300 of the new R179 cars to be delivered by January 2017. That date could now be pushed back between six months and 11 months, officials said. The train’s current R32 cars, built in 1964 and 1965, break down more often than younger cars.Read more: Source