The establishment of expressway monitoring system is to solve two main problems in expressway operation: traffic jam and safety. It is aim to ensure road safety and smooth traffic. The monitoring system is an important part of the expressway traffic electromechanical system, whose main function is to use the modern traffic flow observation, guidance and control theory, and the use of computer technology, closed-circuit television monitoring technology, information multimedia technology and other fields of the latest scientific and technological development, the traffic operation condition, vehicle driving condition and road environment condition are observed comprehensively, and the driving route and driving mode of vehicles along the highway are effectively guided and controlled.

In our solution, we use NEU50484TGS-SFP core layer Industrial Ethernet switch as backbone network and convergent layer NEU500244T8CGS-SFP, NEU50244T8CGS-SFP Industrial Ethernet switch to form STAR network and tree network topology with gigabit fiber switches such as NEU1042G-SFP, NEU1011G, NEU1021G, NEU1041G in the access layer respectively, there is an access point for each section, depending on the circumstances. Each section of the line is monitored using high-definition cameras that pull together video feeds uploaded through a Gigabit Ethernet network channel, then each monitoring point will be gathered in the monitoring command center by the way of Tree Network. The command center uploads video from a 10-gigabit Ethernet network channel to a core layer switch, which then transmits the video to a monitor screen for real-time monitoring of highway traffic.