The Public Service Railway operated most of the trolley lines in New Jersey by the early 20th century.

Public Service lines stretched from northeast New Jersey to Trenton, and then south to Camden and its suburbs.

In 1928, the operations of the two companies were merged to form Public Service Coordinated Transport.

[citation needed] Following bustitution, the only streetcar route still in operation was the #7 line, in the form of the Newark City Subway.

At the turn of the 21st century, the line was upgraded to operate new modern light rail cars, and was extended northward into Bloomfield.