A traffic control system, that includes a first modular control unit; a first portable signaling device in communication with the first modular control unit, wherein the first portable signaling device includes at least one display and at least one vehicle-detecting camera; a second modular control unit; a second portable signaling device in communication with the second modular control unit, wherein the second portable signaling device includes at least one display and at least one vehicle-detecting camera; and a mesh network formed between the first modular control unit and the second modular control unit, wherein the mesh network enables completely autonomous functioning of the first portable signaling device in combination with the second portable signaling device for controlling traffic within a work zone in which the first and second portable signaling devices have been placed.
