you need space to do that, not many cities in Europe have the luxury of being built from scratch and having so much space to dedicate to a single intersection.
edit: anyway the simplest solution is to turn every intersection into a roundabout, no traffic lights needed, clear right of way, cars can't go fast and in the end it also makes it easier for pedestrians to cross the street.
Where i live (in Rome) the streets are like this
https://as1.ftcdn.net/v2/jpg/04/93/42/24/1000_F_493422444_Hw...
edit: anyway the simplest solution is to turn every intersection into a roundabout, no traffic lights needed, clear right of way, cars can't go fast and in the end it also makes it easier for pedestrians to cross the street.