Handing authority to the driver increases controllability at lower automation levels. Measures modify the human-machine interface so the handover request and needed information are clear enough for the driver to gain situational awareness and act, and modify the user notification and fallback strategy, for example reducing speed on a sight restriction, requesting takeover and stopping if it is not taken in time. Handover may be impossible at some automation levels, the transition itself must be controllable and not add risk, and HMI study guidance is considered.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.