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国外最近制成一种用来指挥交通的雷达设备.它是根据多普勒效应原理设计而成的,能在瞬刻之间精确的探测出在路上行驶的车辆.依靠机内的特别电路可向两个交通方向中任何一个方向发出交通阻断指示.机内使用二只2K25速调管以发出频率为9千兆赫信号.二副具有方向性的抛物面的天线能够对车辆速度为33/4至100里/小时范围内任何速度作90°扫描以探测行进中的车辆.此种雷达可以安装在离地2～3米的支持物上或安装在交通信号灯的顶上.
Abroad recently made a radar equipment used to direct traffic.It is based on the Doppler effect of the principle designed to be able to accurately detect between the instantaneous vehicle driving on the road.Relying on the special circuit within the machine can Traffic jam instructions are issued in either of the two directions of traffic, using two 2K25 kyphos to generate a 9 GHz signal. Two directional parabolic antennas are available for a speed of 33/4 90 ° scan at any speed in the range of 100 km / h to detect vehicles in motion. The radar can be mounted on a support 2-3 meters away from the ground or atop a traffic light.