As was pointed out earlier, we already have interactive speed limiters. One or more eyeballs and a means of increasing or decreasing vehicle speed is available to everybody who drives, and is about as interactive as one can get. Maybe if we actually remove a few road signs, leaving only the really important ones, people would pay more attention to what matters.
It seems to me that 'Ancient' is living up to his moniker. We should uninvent motorised vehicles and move back to the stone age! Human kind wants a means of travelling further than walking allows, at a greater rate and carrying or partially offloading those items they wish to carry. We tried horses, on a very large scale, and accidents were common. Many were fatal. We invented bicycles, but accidents still happened, people were still killed and injured despite the motor car not having a significant presence. We tried trains, but trains crashed, people were run over and many were killed. We tried the car, but people are still killed or injured.
Strangely, I can see a pattern here, so let us get rid of them all and watch as our lives become safer. Life will be much improved, Ancient will be happy and we can all exist in perfect harmony. Aka, the stone age. Good times for all.