It seems Toyota's ultimate goal is for even the driver to become a passenger, having today outlined a system which will incorporate brake application into satellite navigation technology.
Using GPS data and a rear-mounted camera, the system will acknowledge an upcoming stop sign and calculate whether the driver has applied enough brake force to stop in time, if not the system takes over bringing the car to a halt.
Previously, Toyota has taken driving out of the hands of drivers with its self-parking system, which has achieved debatable success.
The typical GPS system in most cars is only accurate to around 15m, presumably this kind of technology would only be implemented on premium Lexus models where the high-end GPS software is accurate to within as little as 30cm.
The system is more than just a technological showcase, with Toyota set to release new models in Japan carrying the system in the near future.
Thankfully it appears as though the system relies on road markings unique to Japan, so it seems unlikely that it would make it into Australian spec vehicles.