高速公路的监控和通信系统就是为随时掌握不断变化的交通流,及时发现异常,迅速采取有效措施,为了保证高速公路监控和通信系统中的各种设备免遭各种暂态过压的干扰和损害,应采取相应的保护措施减少或避免交通阻塞,拥挤和事故,使之达到高速,安全,舒适的目的。 Expressway monitoring and communication system is to keep abreast of changing traffic flow, timely detection of anomalies, to take prompt and effective measures, in order to ensure that the highway monitoring and communication systems in a variety of devices from transient over-voltage interference and Damage, should take appropriate protective measures to reduce or avoid traffic congestion, congestion and accidents, so as to achieve high-speed, safe and comfortable purpose.