The Sepulveda Pass Transit Corridor is a two-phased planned transit corridor connecting the Los Angeles Basin to the San Fernando Valley through the Sepulveda Pass in Los Angeles, California, by supplementing the existing freeway. The corridor would partly parallel I-405, and proposed alternatives include a rapid transit (subway) or a monorail line connecting the G Line in the Valley to the D Line and E Line on the Westside, and the K Line near Los Angeles International Airport.