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交通部公路科学研究所研制的SX-12型高亮度发光二级管可变限速标志是高速公路监控系统的外场设备。在交通控制中心的统一控制下,根据道路或气象情况指示驾驶员改变车速,可使高速公路的通行量增大到最佳密度,改善交通流的稳定性。对高速公路的现代化管理,提高道路使用效率和保证交通安全等方面起着重要作用。该标志可显示10～90km/h及全灭10种状态。视认距离50～250m,标志显示屏由新研制的高亮度发光二级管组合器件构成。每个组合器件带有螺口灯座,拆装方便,便于维护,还
The SX-12 high-brightness light-emitting diode variable speed limit sign developed by the Institute of Highway Science and Technology of the Ministry of Communications is an outfield device of the highway monitoring and control system. Under the unified control of the traffic control center, directing the driver to change the vehicle speed according to the road or meteorological conditions can increase the traffic volume of the expressway to the optimum density and improve the stability of the traffic flow. It plays an important role in modern management of expressways, improving the efficiency of road use and ensuring traffic safety. The sign can show 10 ~ 90km / h and all off 10 kinds of state. As the recognition distance of 50 ~ 250m, the sign display by the newly developed high-brightness light-emitting diode combination of components. Each combination of devices with screw socket, easy accessibility, ease of maintenance, also