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.

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 cr… ...

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 cr… ...

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 cr… ...