Now is an opportunity, perhaps first in ~100 years, perhaps last, to recover the streets for unaugmented humans: slow down cars in urban areas, increase qualifications for humans to drive, eventually ban human drivers entirely, leaving only automated vehicles with enough sensors and going slowly enough to reduce auto-related deaths for pedestrians and passengers alike to zero.
let's make walking and biking cool, but not at the expense of fast personal transport (cars). the best solution isn't to try to slow down the cars but rather to make mixed-use urban areas the default so that walking and biking become the norm. you also get all kinds of other benefits with that (less traffic, healthier air, more fit people, etc) i agree that driving qualifications should be more strict, but probably i…
I'd wager that you can reduce the top speed cars are allowed to travel significantly before the effective speed goes down by much, especially if you can improve traffic flow by e.g. vehicle-vehicle communication.