An artist’s rendering of the completed Skyway Bridge at Interstate 270. Once completed, the bridge will be the longest in RTD’s FastTracks program, the longest in Colorado and one of the longest in the nation. At just over 9,500 feet, the Skyway Bridge will be longer than the famous Golden Gate or Brooklyn bridges. The Skyway Bridge is part of the 18.5-mile long North Metro Rail Line project that will run from Denver Union Station through Commerce City, Northglenn and Thornton. It’s scheduled to open in 2018..