 The road runs between Orange and Perthus, in the Pyrénées-Orientales at the frontier with Spain where it becomes the "Autopista AP-7".The route passes the following major towns and cities Perpignan (Pyrénées-Orientales), Narbonne (Aude), Béziers and Montpellier (Hérault), Nîmes (Gard) and Orange (Vaucluse) before joining the A7 autoroute (Marseille to Lyon).The route is 2x3 as far south as exit 41 (Perpignan-Nord); widening between exit 41 and the Spanish frontier is currently (2012) in progress.