说明：  基于虚拟仪器设计了智能交通信号灯的控制系统，实现信号灯按照一定规律自动交替，手动控制调节道路通行时间，时间连续显示以及不同声音提醒的多种功能.
(This program designs an intelligent traffic signal control system based on virtual instrument technology. This system realizes some functions, for example, that the lights can be lighted alternately according to a rule, and that the time is displayed continuously. And also, the system provides several choices for users to choose different passing time. )