While sitting in the lounge room at the Highrise in the evenings, flashes from down below reflect from our blinds. Since the speed/redlight camera has been installed, we have seen many flashes; the camera takes two shots, two flashes.
But another flash has appeared, a single flash. I investigated thoroughly and intensively, by taking my drink out onto the balcony.
The tramway authority has done something to the wire that is in front of the Highrise, but only the wire for the trams going to the city, not the outbound ones. Where the tram pantograph meets the overhead wire, an electric flash occurs as tram passes. The flash is quite a pretty colour but it does not happen every time. This is curious. With trams passing the Highrise in huge numbers, I get to know about them, especially their roofs and overhead wiring and the pantograph things. Maybe there is something on the wire? I never think to look in the daylight and it is a bit far away to see properly. I wondered if some variety of tram flashes and some don't. That would be odd and after study, no matter what variety of tram it is, it flashes, or does not.
I have worked it out now. The flash happens when the tram is under power. If the tram is coasting, no flash, as it not drawing the electric power. There is never a flash from the trams going the other way. Why has this flash device been installed?