Beginning in 1921, intrastate bus service was regulated by the New Jersey Board of Public Utility Commissioners. The only bus company listed in a 1926 Annual Report was Public Service Transportation Co., which later became part of Public Service Coordinated Transport. That company provided local and interurban bus service throughout much of the state, and was the main bus predecessor to the state owned New Jersey Transit.
Because New Jersey is a small densely populated state, bus service generally is of a more local nature. Besides Public Service Coordinated Transport, there were numerous independent bus companies, all part of a complex history of bus transportation in New Jersey. Early bus companies evolving into the nationwide bus systems included Pennsylvania Greyhound Lines, and Nevin Bus Lines which was eventually merged into Safeway Lines, part of the Trailways system.