My Audi
- makes the steerwheel vibrate if I veer off my lane, actively works against that (limited 'self-steering', but really, really crappy, useless and stupid in its current incarnation)
- has lights in the side mirrors that light up when someone's left or right behind of me. If I set the turning signal to a 'blocked' direction, the lights flash. This system is immensely satisfying for me, works awesome.
- stops the car on its own if it believes that a crash cannot be avoided and while I still go 30km/h or less. It breaks _immediately_
- issues a high pitched warning noise if it assumes that a collision might be imminent but outside of the safety zone (> 30km/h)
- supports automated cruising control, that breaks/accelerates on its own, depending on the traffic ahead and to the side (it won't overtake a car while you're right of it).
That said: I love driving. I love leisure rides, love to drive on the Autobahn. That car's rather 'slow' (compared to previous company cars) and tops out at 220km/h. When it is safe I really like to drive at that speed.
I think the resistance to self-driving cars is based on mistrust (you give up control, after all) and ego mostly - but it doesn't help the industry or supporters of that idea to paint everyone that likes to drive as a potential 2 ton bullet. A little perspective on both sides would help a lot here.
Here that's not combined, if there's something in my blind spot I just have those lights (flashing if I set a turning signal). There's an assistant that is supposed to keep me in my lane. In theory it ignored lane changes only if I set the turning signal (-> intended by me) and otherwise steers in the opposite direction (I can still beat it, it just tries to convince me otherwise). Plus, it vibrates the steering wheel.
It doesn't work, though. Audi was obviously so afraid that people start leaning back and drinking a nice cup of coffee that they added a very annoying 'are you still alive' test. That assistant is going to power down on its own as soon as it things you're not steering anymore. Which often happens without reason (just driving straight).
Basically that thing is only working if you hold the steering wheel like a 50's/60's Hollywood star, turning left and right on a dead straight street. Maybe the next incarnation will improve this design..
Self-driving cars ought to also be capable of driving like grandmothers. That's part of why I expect them to be safer. The idea that you can drive a car to the brink of a high-speed collision and then magically expect it to out-react a seasoned driver into avoiding an essentially unavoidable accident is juvenile fantasy.
[0] - self-driving cars constantly talking with each other could drive much closer to each other than current "safe distance", much faster, while utilizing aerodynamic effects to conserve fuel, and that system would still in principle be safer than human drivers.