I know you dont have Poliscan over there but you may still know what was going on here.
On the way home from work i went past a Poliscan speed camera. The LI (and STI-R) alerted and continued to alert till i had passed the unit. I turned around and went past the other way (a rear facing shot from the Poliscan) and only the LI alerted (as you would expect) and continued to alert until i was out of range.
I turned around and went past again. And again the LI continued to alert until i had passed the unit. I turned around again and back for the rear firing shot and same thing.
Now here is where it changes. The third time i went through the LI alerted once and then went silent, still about 60m from the Poliscan. On the way back (reverse shot) it continued to alert until i was out of range. Again i turned around and on the fourth pass the same thing. the LI alerted once and went silent about 60m from the Poliscan.
I was just wondering why the LI would alert continually (it ran through about 4 warning cycles) on the first two passes but then only alert once and then go silent on the third and fourth pass?