2、、车辆停车等待时间不合理、急车强通等问题。该系统具有结构简单、可靠性高、成本低、实时性好、安装维护方便等优点,有广泛的应用前景。[关键词]交通灯;单片机;STC89C52Thedesigncontrolsystemoftrafficlightbasedonsinglechip(Grade12,Class1,Major Electronic information science and technology ,School of Physics and Telecommunication Engineering,Shaanxi University of Technolog