duong cu hoac moi,nhat la duong 2 lanes thi phai ke voi,bay gio phai cho het lun thi moi ke duong.nhu vay duong se do may bac tai tu quyet dinh theo kinh nghiem cua minh, trong truong hop xay ra giao thong vi lan duong thi nhu the nao ? Dang le khi khanh thanh thi phai ke duong,neu vi ly do nao do phai cho 5 den 10 thi nhu the nao ? o Vn cai moc lam viec khong on dinh
