eli5 why at stop lights turn signal flashes sync up for only a little bit

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eli5 why at stop lights turn signal flashes sync up for only a little bit

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Answer 1

I assume you mean turn signals on different cars!?

Because the blinking rate of turn signals isn’t regulated to the same precision as, let’s say, a wrist watch needs in order to be useful. Different cars will have slightly different frequency (blinking rate). This means that some cars will blink faster than others, resulting in the flashes syncing up, going ahead and then catching the slower ones again, effectively “lapping” the slower turn signals.