The works consist of the rehabilitation and reinforcement of the carriageway, in the Paris-Lille direction, including the ramps of junctions 91, 17.1 and 18 of the A1 motorway

The works include: - Full-width pavement planing, including BAU, up to 2.5 cm: 110,000 square metres - Application of 19,000 t of Bbsg-Bmp-0/14 asphalt over 8 cm thickness - Application of 3,600 t of GB - hP - bmp-0/20 asphalt over 15cm thickness - Application of 6,300 t of BBTM-BMP asphalt over a thickness of 2.5 cm - Replacement of directional signalling registers - Maintenance of a grassy ditch, of 630 ml - the creation of a new metering site, including associated network works - the construction of 32 metering sensors on the road - the repair of metal barriers - temporary site signage