Solar road traffic signal lamp system

The utility model provides a solar road traffic signal lamp system which comprises a plurality of signal lamp subsystems which are respectively arranged at each crossroad. Each signal lamp subsystem comprises a lamp stand, a crossbar fixed on the upper portion of the lamp stand and several signal lamp sets installed on the crossbar. A solar cell panel is also arranged on the top of the lamp stand. An AC charging module, a signal lamp controller and a storage battery are installed on the lamp stand. In each signal lamp subsystem, the solar cell panel and the AC charging module are connected with a signal lamp controller which is respectively connected with the storage battery and the signal lamp sets. The signal lamp controllers of the signal lamp subsystems form a loop connection through RS485 communication lines. Input ends of the AC charging modules of the signal lamp subsystems form a loop connection through AC power lines. A wireless data communication module is arranged inside at least one signal lamp co