Instead of the standard red-yellow-green sequence, the Hawk signal has added some new variations.

Instead of one bulb, LED traffic signals contain about 200 pencil-eraser-size points of light. In the past, the light from green LEDs was too faint to use in traffic signals.

On many traffic signals found throughout the United States, there is a small light that is placed in between or off to the side of the traffic signal lights. You may not know it, but they play a ...

On many traffic signals found throughout the United States, there is a small light that is placed in between or off to the side of the traffic signal lights. You may not know it, but they play a ...

Traffic Signal Lights Easier On Eyes, Budget. State Switching to New Bulbs. June 15, 2002. By Diane Mattingly. In a tough year of budget cuts and management changes, Virginia's beleaguered ...

Traffic lights might see a fourth signal as self-driving cars become more practical. Getty Images/iStockphoto. The researcher’s latest plans differ from a 2020 model of a four-light intersection.

On many traffic signals found throughout the United States, there is a small light that is placed in between or off to the side of the traffic signal lights. You may not know it, but they play a ...

On many traffic signals found throughout the United States, there is a small light between or off to the side of the traffic signal lights. Sometimes you see them blink when emergency vehicles are ...

PENNSYLVANIA (WHTM) — On many traffic signals found throughout the United States and Pennsylvania, there is a small light that is placed in between or off to the side of the traffic signal lights.