Penchala Tunnel

The Penchala Tunnel is a highway tunnel in Kuala Lumpur, Malaysia. Part of the Sprint Expressway, the tunnel leads motorists to TTDI, Damansara–Puchong Expressway, Kampung Sungai Penchala and Mont Kiara. Opened in August 2004, the tunnel is 700 metres long and is the widest highway tunnel in the country.
A twin-tubed tunnel, it was constructed using the rock-explosion method due to the unstable rock condition at the tunnel site.
The tunnel's features includes a linear heat detector, gas detectors, adaptive lighting and ventilation fans and cross-passages for escape during emergencies.