1. A system for changing from automated operation of a host-vehicle to manual control of the host-vehicle by an operator, said system comprising: a sensor installed in a host-vehicle, said sensor operable to determine a state-of-awareness of an operator of the host-vehicle, said state-of-awareness indicative of how much time is needed for the operator to become prepared to take manual control of the host-vehicle; a data-source that provides route-data used for automated operation of the host-vehicle, wherein said route-data includes a map and a control-rule for automated operation of the host-vehicle while navigating the map when state-of-awareness of the operator is attentive; and a controller in communication with the sensor and the data-source, said controller configured to operate the host-vehicle during automated operation of the host-vehicle in accordance with the route-data, wherein the controller is configured to modify the control-rule when the state-of-awareness of the operator is not attentive.