Green on maps and signs. A main recommended route these can be either single carriageway or dual carriageway. The primary road network is fully connected, meaning you can reach any part from any other without leaving the network. Some of the major dual carriageway primary routes have numbered junctions in the style of the Continental semi-motorways. Many Primary Routes are largely or wholly subject to clearway restrictions, and in major cities they may be classed as red routes. Emergency telephones, if present at all, are usually infrequent - there may be some additional telephones operated by the UK's two main motoring organisations, the RAC and the AA, but these are becoming rarer.