California Code, Public Utilities Code - PUC § 232

“Street railroad corporation” includes every corporation or person owning, controlling, operating, or managing any street railroad for compensation within this State, or owning, controlling, operating, or managing as a part of or in conjunction with such street railroad any automobile, jitney bus, stage, or auto stage used in the business of transportation of persons or property for compensation over any public highway in this State between fixed termini or over a regular route.