A heavy duty dump truck went off the highway Wednesday afternoon and down a steep ravine between I-84 east and westbound at Exit 7.  The first State Trooper on the scene found the driver entangled in the wreckage and unconscious. The Trooper performed life saving care until Danbury Fire and EMS units arrived moments later. Fire units set up a rope hauling system to get safely down to the wreckage and in order to bring the driver back up the hill to the roadway. Firefighters worked to free the driver from the cab of the truck, taking approximately ten minutes to remove him. Once up and out of the ravine, the ambulance transported the driver to the hospital. The Connecticut State Police are investigating the accident.