Kuala Lumpur floods. Fed up with the devastating damage of the 1999 and 2003 flooding, the Malayan government gave the go-ahead for an unprecedented solution: a six-mile-long, 20-foot-high storm drain tunnel drilled directly under the city, feeding from the airport to a holding pond out of town. The wrinkle? To make the $525 million project affordable, the tunnel will do double duty as a three-mile-long double-decker toll road, creating the only fast way into and out of the choking capital city traffic.