cuang guy& 1T cac phuong tien eh& qua tai trong cho phep, &rig theyi tap trung cac 16i la nguyen nhan ,tang tai nan giao thOng nhu: vi phaln quy dinh tO'c do, nang de5 con; di sai phan duang lan dueyng; kheing mu bao hiem; &mg do xe trai quy dinh; tap trung vac)....