There are traffic woes in Greenburgh Wednesday after a car struck an overpass.Police say the accident happened at around 10:30 p.m. on Route 119 at Knollwood Road. According to police, the car slammed into the bridge, knocking stones to the road below.Investigators say a second accident then occurred when another driver hit the debris. The driver suffered minor injuries after the vehicle's airbags deployed. The lower section of the road has been shut down in both directions and officials say it may remain closed for a few days.