In this DISOB - Duh, It's so Obvious Brazil - the Grittmeister touches upon elevation, of the street kind ( yes, tough street lingo from a refined poet).
I am talking about different planes between street and surroundings. This "revolutionary" concept is already in use in some parts of Southern Brazil from what I have observed. Now isn't it obvious that a simple elevation at crossing points and intersections would increase visibility, hence safety, and reduce accidents plus their incurring costs: usually the public health system has to care for uninsured pedestrians.
I don't want to get into the emotional toll accidents inflict on families since that is just too harsh.
Now look at this elevation being all gritty and useful in a Southern Brazilian city.