Following a major increase in transportation demand resulting from the development and expansion of the urban mass, the Wilaya (province) of Algiers and the Public Works Department have planned to build a second beltway in order to relieve traffic congestion on the existing road network.

Different four-lane highway variants were proposed and the selected alternative was the object of a detailed preliminary study which included the design of more than 60 km of highway, 16 main and secondary interchanges (simple trumpet, half cloverleaf, cloverleaf and directional), 48 restorations for existing roads, 3 viaducts, 63 bridges, as well as 23 types of drainage structures.

Services provided (2003 to 2005)

• Technical coordination;
• Coordination and analysis of the topographical surveys, geotechnical studies and environmental impact studies;
• Traffic survey with O-D (origin destination) studies;
• Hydrological and hydraulic studies;
• Preliminary studies for the choice of variant;
• Basic engineering (highways –structures – interchanges);
• Detailed preliminary design (highways –structures – interchanges);
• Cost estimation and technical specifications;
• Preparation of invitation to tender documents.

Client

Public Works Directorate of the Wilaya of Alger and National Highway Agency