Traffic Light Control
 Overview
Beijing is China’s second largest city, after Shanghai.
It is a major transportation center, with dozens of
railways, roads and motorways passing through the
city. The city will host the 2008 Summer Olympics,
to improve the heavy traffic during rush hour; public
transportation and intelligent traffic system are often
introduced in nearly all metropolitans. For intelligent
traffic system, it requires Ethernet redundant
mechanism, RS-232/422 to Ethernet converter to
remote control traffic light and other traffic sign/
display.
Fiber converters becomes a must since the remote control traffic light maybe located tens of kilometers apart. In the diagram below, each circle
represents 4 sets of traffic light from 4 intersections, and the traffic information is collected and transmitted back to the traffic control center instantly through the JetCon2301’s Fiber connection. JetPort/JetCon Series is the best combination for the traffic control application operating under harsh environment. Connecting the JetPort 5601 to the traffic light controller and link to the JetNet 4508f through Ethernet then report those signals to the control center. By using this network architecture demonstrated in the picture, it provides Ethernet Ring redundant solution assuring a non-stop data transmitting to the traffic control system. Fiber module in single mode of the JetNet 4508f extends the network connectivity.
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