Adaptive Cruise Control + Lane Assist is in fact quite common. You can get it on the big Audis, JLR have it as standard and even Ford do it (I worked on it for

Adaptive Cruise Control + Lane Assist is in fact quite common. You can get it on the big Audis, JLR have it as standard and even Ford do it (I worked on it for the Kuga, but it will trickle down eventually)