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看看第二张照片是否过线圈触发的：
http://www.trafficlaw.com.au/red.lights.html
If a vehicle passes onto the loop when the loop is activated, the loop will monitor the passing of that vehicle. If the vehicle stops on the loop, no photo is taken. If the vehicle clears the loop by moving forward, the system determines that a vehicle has entered the intersection against a red light. A photo is taken.
A second photo is taken about 1 second later.
Sometimes there is a flash associated with taking the photo.
说的很分明了，第一张是红灯时分经过线圈触发，第二张是1秒当前拍的
例子：第二张照片车子都在路两头了，路两头哪里来的线圈？
https://www..com.au/bbs/ ... mp;tid=十一87820&
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论坛元老