Second Algiers Ring Road | Algeria
Located in northern Africa along the Mediterranean, Algeria has a population of 37 million. It is the 10th-largest country in the world. At various times in history, Algeria has been part of the Roman, Byzantine and Ottoman empires.
Algeria has a 104,000-kilometer roadway network, including 71,656 kilometers of paved roads. While the country’s highway system is one of the most developed in Africa, the government sought to further expand it.
The National Agency of Highways selected Louis Berger to manage the construction of a 65-kilometer second Algiers ring road. The road links the cities of Zeralda and Boudouaou, which flank the capital city of Algiers.
The project included over 55 important structures, including 16 interchanges, a tunnel with two cells of 250 meters each, and 38 bridges and viaducts. In particular, the works included four viaducts that ranged from 280 to over 2000 meters in total length, and several bridges that ranged from 302 to 589 meters long with spans ranging from 33 to 49 meters.
Louis Berger's duties included:
- Developing contract documents, cost estimates and project schedules.
- Reviewing designs of roadways and structures.
- Ensuring that all work was completed in compliance with contract specifications.
The improvements also required the construction of 160 kilometers of secondary roads and interchange ramps as well as the rehabilitation of several existing roads. The materials required for the completion of the project included 400 million cubic feet of backfill, 140 million cubic feet of excavation and 900,000 tons of asphalt concrete.