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使用感应信号机管理交叉口国外已有多年。我国则只有几年的历史。感应信号机可分为全感应和半感应两种。半感应机只在一个方向即两个对向进口道上设置车辆检测器,主要用于两组进口道流量相差较大的主、次路相交的路口。国外半感应机的用法是:将检测器安置在交叉口的次路即流量较小的两对向进口道上。如果次路上无车到达,主路上信号灯就保持常绿,当次路检测到来车时,主路绿灯在保证得到最低限度绿灯之后变成红灯,绿灯转到次路上,待次路车辆全部通过或绿灯达到预置的最长绿灯时间之后,将绿灯转
Induction signal management crossroads abroad for many years. My country only has a few years of history. Induction signal can be divided into full induction and semi-induction two. Semi-induction machine only in one direction that is two on the entrance of the road to set the vehicle detector, mainly for the two sets of imported large difference between the flow of primary and secondary intersection intersection. The use of foreign semi-induction machine is: the detector placed in the intersection of the secondary road that flows less two pairs of imports on the road. If no car arrives on the secondary road, the traffic lights on the main road will remain evergreen. When the secondary road detects the arrival of the car, the green light of the main road turns into a red light after getting the minimum green light, the green light will go to the secondary road and all the secondary vehicles will pass Or the green light reaches the preset maximum green time, turn the green light