Switching signal input and output circuit of road traffic signal controller

The utility model relates to the field of intelligent traffic engineering, belongs to a road traffic signal controller and particularly relates to a switching signal input and output circuit of the road traffic signal controller. The switching signal input and output circuit comprises multiple switching signal driving circuits, a signal control circuit and a signal interface, wherein the multiple switching signal driving circuits are respectively connected to the signal control circuit, and one end of the signal control circuit controls the multiple switching signal driving circuits while the other end is communicated with the external via the signal interface. The switching signal input and output circuit can realize acquisition of multi-path switching values, simultaneously can control open-and-close output of multiple relays, is an important component of the road traffic signal controller, dose not need to arrange a microprocessor thereon or the serial-port communication protocol and has comprehensive func