What is reason for upgrading Tran Phu from Nguyen Tri Phuong to An Duong Vuong to primary? Based on your own definition, if I remove this section, I don't see how much traffic it's going to impact.

No offense, but I have a feeling that sometimes you seems to be playing around with the "geometry". In other words, you try to get the road colors to fit your eyes. Please don't do that!