Arterial road (0x4, polyline) cac duong chinh chay tu Bac xuong Nam,
tu Dong qua Tay, cac duong xuyen thanh pho
Collector road (0x5, polyline), cac duong noi cac quan voi nhau
Residential street (0x6, polyline), cac duong trong cac khu dan cu.
Minh cu lam thu mot khu vuc, roi xai thu coi no ra sao.