Ask Trooper Steve: Blue lights atop traffic signals

Steve Montiero answers viewer questions

By Daniel Dahm - Digital Manager, Steve Montiero - Traffic Anchor

ORLANDO, Fla. - When you're driving, you don't want to see blue lights, especially in your rearview mirror.

But have you ever wondered what the blue light is on top of a traffic signal?

Daniel, of Orlando, asked News 6 Traffic Safety Expert Steve Montiero about the purpose of those blue lights.

"Believe it or not, those blue lights have nothing to do with you or the car next to you," Montiero said. "In fact, they are there to serve one purpose: for law enforcement officers to conduct traffic enforcement."

The blue solid lights are in sync with a red traffic signal, allowing officers to see a violation occur. 

Any time a traffic signal is red, the blue light appears on the opposite side. This allows a law enforcement officer to know when a traffic signal is red, even when he or she is on the other side of the intersection.

Be careful out there.


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