A57Main contractor

Lieu : France

Client : ESCOTA

Date : 2018 - 2025

Le projet

The project involves widening the A57 freeway to 2×3 lanes over a distance of 6.75 km, between the Benoît Malon interchange and the Pierre Ronde motorway junction.

The chosen layout aims to :

Improve traffic flow by increasing capacity on the A57,
Improve user safety by reducing accident-prone areas,
Optimize the operation of the various diffusers and connecting junctions,
Improve integration into the urban fabric and develop soft modes of transport,
Improve living conditions for local residents (reduce noise and speed pollution),
Encourage the use of public transport by building VRTCs along a large part of the line,
Reinforce intermodality by creating bus stops on the A57 motorway.

Nos missions

The mission concerns the main project management for the detailed design and execution of the works, in compliance with Vinci Autoroutes BIM specifications:

AVP to PRO level (including BIM),
PRO (including BIM),
ACT,
VISA (including BIM),
DET and AOR.

The contract also includes additional tasks for coordinating specific MŒs and assisting the client: CMP, ECI, EPE, ASBC, COM, GCECT, DOE RECOLEMENT, BIM in the EXE phase.

The main constraints for this mission are: co-activity of the works, works under traffic, urban context with dense traffic, acceptability of the project, important hydraulic stakes…

Project features :

- Length: 6.75 km,
- average annual daily traffic > to 110,000 veh/day,
- 6 exchangers,
- 7 Overpass OAs,
- 4 Underpass OAs, including 1 rail OA (Paris-Ventimiglia track),
- 2 soft-mode footbridges,
- 7.1 km of acoustic screens,
- 12 multi-purpose pools, 10 of which are underground,
- 40 retaining walls (max height 7m),
- BAU equipped for VRTC,
- Creation of bus stops on freeways,
- Estimated cost of works: €200m excluding VAT.