Consensus vehicular collision properties determination is provided by a method that receives mobile device sensor data from mobile device(s) of vehicle occupant(s). The vehicle is a vehicle of multiple vehicles involved in a collision, and the sensor data indicates movement and position information pertaining to the collision. The method shares the packaged sensor data to a decentralized ledger that stores this as part of a collection of sensor data from across multiple mobile devices of different vehicle occupants in the vehicles involved in the collision. Extraction and correlation of data from the ledger is used to determine consensus properties of the collision. The method determines, based on the consensus properties of the collision, which of the different vehicle occupants were driving the multiple vehicles involved in the collision and behavior of those occupants driving the multiple vehicles at the time of, and following, the collision.