Short excerpt from the supplied user guide:
The Pacific Surfliner trains came into being after Amtrak geographically outgrew the San Diegan moniker by beginning service north of Los Angeles on what was then the Southern Pacific's Coast Line, serving the beach cities of Ventura and Santa Barbara. A subsequent extension north to San Luis Obispo sealed the deal, and in unprecedented partnership between Amtrak and the State of California, the Pacific Surfliner was born.
