The source of the Oued Bou Regreg lies in the mid Atlas Mountains. This river is important both historically and symbolically as Rabat, capital of Morocco, was built at its mouth.


Within the framework of the project for the motorway around Rabat, the Morocco National Motorway Company wished to mark this crossing with an exceptional work: a cable-stayed bridge.


The wideness of the gap to cross, the steep walls, the relief rising 150m above the Oued and the mediocre quality ground in the area around the Oued, require a wide span crossing solution, therefore limiting the number of supports.


The project’s design achieves the goals of strong and unique architecture, adapted to the site and its constraints, key features of the first cable-stayed bridge in Morocco.


The cable-stayed viaduct rests on 4 leg pylons with a shape inspired by Moroccan architecture, characterised by its well-maintained cultural heritage enriched with touches of modernity.

These pylons contribute to the stability of the project, providing the rest of the structure (deck and stays) with lightness and slenderness without intermediate supports.




setec tpi led the design project management services during the outline audit and preliminary phases (APS, APD) as well as the preparation of the client’s tendering documentation.

Key information

Client : Société Nationale des Autoroutes du Maroc (ADM) / Moroccan National Motorway Company

Design JV : Strates (H. Vadon) Architect, setec tpi (PM leader), setec Maroc, terrasol

Montant de travaux : 70 000 000 € HT

Period : 2008 – 2016


In a Nutshell

952 mtotal lenght
Firstcable-stayed bridge in Morocco
200 mhigh pylons

Complex forms

To better understand the structural behaviour of the project, complex due to the shape of the pylons, the specific nature of cable-stayed bridges and the fineness of the deck, static and dynamic tests were run with our in-house developed PYTHAGORAS software. These calculations incorporated construction phasing, ground forks, scientific flowing, turbulent wind and possible seismic disturbances.