upgrading of the Rn2 between Laon and Avesnes-Sur Helpe to 2x2 lanes Section 1 Laon bypass - phase 2 opportunity studies

upgrading of the Rn2 between Laon and Avesnes-Sur-HelpeSection 1 - Laon bypass - phase 2 opportunity studiesfirm tranche: The realization of phase 2 opportunity studies concerning the Laon bypass according to the scenarios defined in the ministerial decision (upgrading to 2x2 lanes on site with or without the status of expressways)optional tranche 1 (with purchase order): Study of complementary scenariosoptional tranche 2: Participation in regulatory consultation phases