 The road increases the speed of journeys from Bordeaux to Pau by automobile.It offers an alternative to the RN134 and RD932 and RD934 (Landes and the Gironde).The road starts in Langon, near Bordeaux, at a junction with A62, then crosses the Gironde and the Eastern part of the Landes where it integrates the By-pass round Aire-sur-l'Adour.