The picture below is the back up approaching the accident scene
Photo courtesy of Alan Chaniewski (Fox news CT)
Update: 2:40 PM:It was being reported that the helicopter that responded had become disabled at the scene once it landed. The fire department apparatus was going to remain at the scene and aid in blocking the scene as well as the helicopter until it is removed. Also the state police will be conducting an investigation into the circumstances leading up to the crash. One lane will be opened shortly but the delays can be expected to last a while longer.
Another shot of the scene courtesy of Ryan Bernat (Fox News CT)