“Stormwater Management and Road Tunnel” or “SMART Tunnel”, was opened to public on the 14th May 2007. It is a 4km long tunnel with dual purpose of reducing traffic congestion and also to avoid flash floods. It is free for a month.

The making of the SMART tunnel was featured on National Geographic about a month ago. It is also well written in Wikipedia

As for me, I enjoyed the 4km long free ride. The tunnel is divided into three compartments by two partitions which forms the road. The upper deck is for vehicles travelling out of Kuala Lumpur and the middle deck, for vehicles travelling into Kuala Lumpur. Below this is the water irrigation channel. In the event of a heavy downpour and flooding, the middle deck would be closed to traffic and water will fill it up to be diverted faster. If conditions gets worse, then even the upper deck will be closed to traffic to enable the whole tunnel to be filled with flood water and diverted quickly elsewhere.

It is the longest stormwater tunnel in South East Asia and second longest in Asia.

Worried, yah! reminds me of the movie where Sly Stallone is trapped within a tunnel — what was the name of that movie – I forget? The other is, I wonder how much would the toll for this tunnel cost? RM5.00 one way maybe!