In this subtitle the following words have the meanings indicated. “Common carrier” means a person that is engaged in the public transportation of persons for hire by land. “Common carrier” includes: A car company, a motor vehicle company, an automobile company, or a motor bus company; A railroad company, street railroad company, or sleeping car company; and A transit company. “Common carrier” does not include any entity owned by the State or a local government. “Public infrastructure” means a bridge or highway owned, controlled, or maintained by the State or a county or municipal government.