Sea-Tac International Airport

Sea-Tac Airport, in the top 10% of the nation’s busiest airports, experiences delays due to low visibility conditions approximately 44% of the year. However, its two existing runways were too close to allow for two streams of traffic to land in such conditions. The new, $1.1-billion runway, which does allow for two streams of traffic, was designed to reduce arrival delays by as much as 80%, save millions of dollars in wasted fuel, and prevent the release of thousands of tons of greenhouse gases. Photo courtesy of Sea-Tac Airport.