Traffic lights and MIRT

Why do traffic lights seem to change green whenever emergency and government vehicles approach? Through the use of various technologies, one of which involves use of a Mobile InfraRed Transmitter (MIRT). An IR sensing device like that pictured above is mounted near overhead traffic lights and senses certain IR LED pulse codes sent by approaching emergency vehicles and changes the light to green. I-Hacked delves further into the underground tech (for education purposes only, of course!)

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2 Comments

  1. Did you read the linked government document? Supposedly, the Federally mandated decibel level for emergency vehicle sirens is 1,200 dB! That’s beyond the pressure of 1 atmosphere, beyond a volcanic explosion, and probably impossible without a nuclear blast, certainly not without complete hearing damage for everyone in the area.

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