Known also as la Méridienne, it is a developmental project with the aim of speeding up and reducing the cost of car travel from Paris southwards, and apart from the Millau Viaduct, it is entirely free for the 335 km (208 mi) between Clermont-Ferrand and Béziers.

[2] The single most impressive feature is undoubtedly the Millau Viaduct, which carries the road over the Tarn.

Other impressive features include: Viaducts and bridges Passes Tunnels In May 2007, construction started on the final section of the A75, a connection from Pézenas to the A9 autoroute a kilometre or so east of the previous Béziers east intersection 35.

The route to the south of the present D609 Pézenas-Béziers road bypassing Valros opened in February 2009.

According to Serge Cuculière, construction operations manager, the delay was due to difficulties encountered on the section ("Les difficultés recontrées sur la section exigent un temps de réalisation plus important").