The Maryland Public Service Commission (PSC or Commission) regulates public utilities and certain passenger transportation companies doing business in Maryland. The Commission regulates gas, electric, telephone, water, and sewage disposal companies. Also subject to the jurisdiction of the Commission are electricity suppliers, fees for pilotage services to vessels, construction of a generating station and certain common carriers engaged in the transportation for hire of persons. The PSC’s jurisdiction extends to taxicabs operating in the City of Baltimore, Baltimore County, Cumberland, and Hagerstown. The categories of regulated public service companies are listed below: electric utilities; gas utilities; combination gas and electric utilities; telecommunications companies; water, and water and sewerage companies; passenger motor vehicle carriers (sedans, limousines, and buses); railroad companies; taxicab companies; and other public service companies. The Commission is empowered to hear and decide matters relating to: (1) rate adjustments; (2) applications to exercise or abandon franchises; (3) applications to modify the type or scope of service; (4) approval of issuance of securities; (5) promulgation of new rules and regulations; and (6) quality of utility and common carrier service.