With improvement of the intelligent traffic control systems, the requirements of signal control system are more complex. The traffic signal control circuit are designed and simulated by using hardware description VHDL language in this paper. Considering the traffic flow and intersection signal characteristics, in order to minimize delays in the vehicle at the intersection of control objectives, the implementation of the optimal control signal is introduced in the traffic signal control systems. A method of top-down hierarchical design was used in the system designing, the design of unit circuit was created a module from the bottom to up. Analyses of simulation results using this approach show significant improvement over traditional full-actuated control, especially for the case of accident and over-saturated traffic demand.