the services, which are the subject of this framework agreement, concern external laboratory checks of investment works on the national road network of the Hauts-De-France region in the following fields: - soil mechanics, foundations, geology, earthworks; - concrete, metal, structures and noise barriers; - aggregates; binders and pavements; - technical assistance on construction sites - gantries, stems and high masts - temporary site signalling

the services, which are the subject of this framework agreement, concern external laboratory checks of investment works on the national road network of the Hauts-De-France region in the following fields: - soil mechanics, foundations, geology, earthworks; - concrete, metal, structures and noise barriers; - aggregates; binders and pavements; - technical assistance on construction sites - gantries, stems and high masts - temporary site signalling