alt Hacker News> GPS synchronized emergency lights
I actually did and whilst I can understand how ridiculous it sounds, to be honest it kind of makes sense. A large number of emergency vehicles at a scene at night can become it's own mini light show which can be really distracting / blinding.
https://standbygroup.com/uk/sync-breathe/
It does look kinda cool though.
Around here they're based off GPS plus time. To many cops got splattered because they had their lights set to day at night and the traffic couldn't see the officer.