- construction of an auxiliary intersecting track (Vae) between junctions 17 and 18 of the A 630 outer ring road;

- Upgrading of the sanitation system on this section, in particular the resizing of the Sarcignan basin located at exit 18

The requirements concern the construction of an auxiliary road to intersect intersecting interchanges 17 and 18 of the A630 outer ring road and the upgrading of the sanitation system and the resizing of the Sarcignan basin located at exit 18.

They include five distinct technical services:

- Service A: preparatory work, earthworks, pavements, miscellaneous works;

- Service B: sanitation;

- Service C: definitive signage and restraint systems;

- Service D: dynamic equipment and public lighting;

- Service E: temporary signage and operation under construction.

The place(s) of performance of the services are as follows: commune de Villenave d'ornon (33140)