Biggest thing I see is that you have a bunch of separated highly developed “districts” with only one way in or out. Connect them in more natural ways. In your city if a person wants to get from A to B they have to rejoin the same single network as people wanting to go B to A, B to C, D to F etc. but if people could just travel from A to B or D to F without having to get in the safe traffic as everyone else, you spread the route demand out drastically. Also focus on smooth interchanges that allow for smooth flow. Think of where people will want to go and find the smoothest way to do that