The Yellow Line of the RTS Koiwai consists of 16 rapid transit stations from KDOT/Metro Center-Dalmasca to Decker Reginrauve Int'l Airport. It travels east from the City of Koiwai to Westminster County, and serves both of Koiwai's major airports. This was the second line for which construction began and completed in the original Approved Regional Rapid Transit plan, and is the main east-west line through Koiwai. It shares two stations with the currently under construction Purple Line.