Adaptive Restraints One of the prime examples of active and passive safety integration already available on vehicles is TRW's Active Control Retractor (ACR) seat belt system. ACR uses signals from active safety systems such as electronic stability control or brake assist to sense a possible loss of lateral vehicle control or an emergency stop situation. Once a potentially dangerous situation is sensed, the active control retractor seatbelt rapidly removes slack to help better position the occupant for a possible accident. If the accident is avoided, the ACR will release after several seconds and return to normal seatbelt mode. TRW’s active control retractor retracts the seatbelt slack in order to better position vehicle occupants.     Other systems such as dual stage inflators, self adapting airbag vents and even occupant vision systems can help to tailor the deployment of airbags to variables such as crash severity, occupant size and proximity to the airbag enclosure.