Because 40,000 people a year die on roads as a result of their design.

Please don’t accept 100 extra funerals a day. It can and will get better.

Changing road design is not necessarily a cultural change from driving.

My country had very bad traffic deaths record. few decades later, traffic is much more intense and there're many more cars, but traffic deaths are waaaaaay down. Thanks to better infrastructure, better cars and better culture especially when it comes to drink and drive...