Tunnelling : Road tunnels

Chalosset tunnel


Like the La Bussière Tunnel, the Chalosset tunnel is located on the A 89 motorway near Tarare. The twin, one-way tunnels are approximately 700 m long with vaulted structures at each end, a cross passage between the two tubes and safety and fire recesses.

Highlight: The twin tunnels were excavated by the drill-and-blast method using an on-site mobile explosives manufacturing unit, which reduced the quantity of explosive material on the worksite.

Contracting authority: Autoroutes du Sud de La France (ASF)
Project management: EGIS Tunnels

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