Hmm, Asian based car companies have some interesting features in their topline models. Once on cruise control, the vehicle warns the driver when they are about to move out of their lane, the vehicles will automatically slow and stop if the traffic requires it (in some case even turns the engine off when stationary) and as the traffic starts moving again, will start the engine and as it is able brings you back up to speed set.

You responsibility is to direct where the vehicle goes.

I would love to see this as standard on all vehicles.