Ridgefield Police are investigating an accident that happened on Route 7 early yesterday afternoon. A northbound vehicle went off the roadway, striking a tree. The lone occupant was extricated from the vehicle and transported to the Danbury Hospital. As this is an active investigation, Ridgefield Police are looking for nay witnesses that may have been behind the vehicle before the crash. Anyone with information is asked to contact Capt. Platt at (203) 438-6531.