Abstract: Methods and apparatus are provided for a safety restraint system for use inside a vehicle compartment by a mobile occupant or crew member. In one preferred embodiment the safety restraint system comprises an upper trolley and track system connected to the ceiling of the vehicle compartment, a lower trolley and track system connected to the floor of the compartment, and a lockable inertia reel with an extensible strap pivotally attached to the upper trolley. The restraint system further comprises an upper tether connected at an upper end to the end of the inertia reel extensible strap, and at the other end to a harness worn by the occupant. The system may further include a lower tether connected at one end to the lower trolley, and connectable at the other end to the occupant's harness.