We'll be able to remove traffic lights, signs, yields, stop signs, and every other limitation... Once the Google Self-Driving car becomes universally adopted. As long as the car itself is able to perfectly judge for safety, and possibly communicate with other cars, then there's no need to stop when the car knows, for a fact, that there are no other obstacles around.
I used to argue that insurance companies would push for them, because self-driving cars would reduce accidents.
But the cynic in me wonders if they will be afraid that self-driving cars will push insurance costs down so much the insurance companies will lose out.
While the costs may go down and people's premiums will likely go down commensurately, accidents will still happen. So most people will carry insurance for that purpose. And besides, do you really think the insurance companies are going to let the state governments make casualty car insurance not required? Or do you think the car loan companies will really drop requiring comprehensive coverage as a requirement? I think not.
Of course, that's still very far off!