There is described an electrical cabinet for a traffic signaling system. The electrical cabinet generally has a housing; an input encoder, the input encoder having input ports receiving input signals carrying states associated with input devices of the traffic signaling system, a serial encoding circuit serially encoding the states of the input signals into a headerless signal, the headerless signal beginning with a first time slot and ending with a last time slot temporally spaced apart from the first time slot, the time slots carrying the states of the input signals, and an output port; and a traffic light controller having a serial decoding circuit receiving the headerless signal and serially decoding the headerless signal to retrieve the states of the input signals carried by the time slots of the headerless signal, the traffic light controller controlling the traffic signaling system based on the retrieved states.