I think the best way is to design the residential roads so that you have to drive really slow on them. I think the best idea is to do build the roads so that t

I think the best way is to design the residential roads so that you have to drive really slow on them. I think the best idea is to do build the roads so that there is a single middle lane, surrounded by nice cobblestone refuges that is possible to drive on slowly. Also add some space for bicycles and pavements for pedestrians.