The Sidi Aich Tunnel, part of the Bejaia Highway project built by the China Railway Construction Corporation Limited (CRCC) in northern Algeria, has opened to traffic.

Sidi Aich tunnel sits on 100-km Liaison Autoroutière Béjaïa - Autoroute Est Ouest highway. East tube is 1,691 is meter and west tube is 1,628 metres.  Tunnel passes through a highly tectonic area of Nappe Tellienne formation. Many faults cross at the location of the tunnel.

https://global.chinadaily.com.cn/a/202307/15/WS64b1fe5aa31035260b816976.html