The
Penchala Tunnel is the widest highway tunnel in
Malaysia. This 700-metre tunnel, located on the
Sprint Expressway's Penchala Link, connects Sungai Penchala to
Mont Kiara in the
Klang Valley. Unlike other
highway tunnels in Malaysia which used
tunnel boring machines during construction, the Penchala Tunnel was bored by using the slower
rock-explosion method, due to unstable rock condition (limestones) at the tunnel site which prevented the concessionaire company Sistem Penyuraian Trafik KL Barat Sdn Bhd (Sprint) to use the faster tunnel boring machine method.