Originally Posted by Bald Paul

With the electronic systems available in modern cars, it would theoretically be possible to:
1) integrate rear facing radar systems with door locks so it would be impossible to open the door into an approaching vehicle (auto or bicycle)
2) integrate navigation systems, which usually will show you the speed limit of the road you are on, into the electronic throttle control so it would be impossible to speed
3) modify the software in forward camera systems used for anti-collision and lane departure systems to recognize yellow and red lights, and integrate it into automatic braking systems so it would be impossible to run a light
4) integrate the electronic steering assist system with turn signals, so you couldn't turn onto that side street without signaling

This isn't science fiction. Those systems already exist on many models, and are already integrated (modern cars often run on LAN systems connecting all the control units together so they can communicate with each other.) All it would take is some updated software logic.

The list could go on and on. So, you ask, why don't they do this?
Simple. Very few people would buy the car. Sure, they would save lives, but all you have to do is watch the news to see how some people react when told they have to do something potentially live saving. Good grief, I worked in the auto industry when automatic seat belts became standard equipment on some cars, and you would be surprised at how many times we were asked to just 'remove those stupid things'.