It doesn't work like that, it's called a bell curve, pic related, there's a fantastic book on it by the same name.
>Coast smarter tham deep interior? Different ethnicities and religions with different iqs?
Anything >>>>>>>>> Muslims
Of course the cities will have more intelligent people simply because of how many high paying jobs there are.
Don't know about the traffic but you bring up a good point.
Abe gandu, Stephen gould ek jhoota chutiya hai
He lied about everything, his book is just propaganda, the original guy was telling the truth. This loafer smeared him because muh poor innocent niggers can build wakanda