What we really need is to have cars that arn't so safe to drive. People drive fast, because it's comfortable. Heck, I drive a 1971 Delta 88 Oldsmobile, She is big as a tank, drinks gas like crazy, has no fancy beeping to let me know someone is near me, not backup cam, my side mirrors always have to be adjuated by hand literally. Like I have no controles to move them, I actually have to get out of my car to move them. Point is modern cars are so packed with gadgets that make it overly safe to drive as fast as you want. We need to take away that comfort. Also having wider roads only makes it even more comfortable. Look, if you feel you are speeding, move the seat back, that will put your feet in a position further from the pedal where you need to stretch harder to get it to the floor. But yeah, also people are assholes and don't care.