In City of Easton v. Miller, 265 Pa. 25, 108 A. 262 (1919) the Supreme Court held that the Public Service Law, the predecessor to the Public Utility Code, did not deprive the City of Easton of the power to regulate the use of its streets by licensed common carriers. Accordingly, the Supreme Court affirmed the conviction of a motorman who believed, mistakenly, that a licensed street car company authorized to operate on the streets of Easton could do so without regard to Easton's traffic ordinance.