 This mainline route was formerly known as Southern Pacific's "West Side Line" and at one time extended from Tracy, California and then south through the West side of the San Joaquin Valley (I-5 corridor) via Patterson, Gustine, Newman, Los Banos, Oxalis and then east to Fresno via Ingle and Kerman.California Northern Railroad now operates the northern section of the line from Tracy - Los Banos.SJVR operates the southern section of the line from Oxalis to Fresno and was at one time owned by Port Railroads, Inc. (PRI; also a Kyle subsidiary) and operated by the SJVR.