Fundamental to this is the need to have a robust and well maintained road network, which is equipped to ensure safe traffic flow and manage traffic across the network during incidents.
O safbwynt pa mor wydn a diogel yw’r draffordd, mae rhwystr diogelwch concrid wedi’i osod ar ei hyd ynghyd â system ar gyfer rheoli terfynau cyflymder newidiol.