(in the US) They usually have no special significance. Sometimes the color of the patrol units go all the way back into the department's history. Some places have ALWAYS had "black & whites" some have always been painted light blue, etc.
So the ants can use them as traffic lights.
On traffic lights it means slow down.
* The disadvantages of traffic lights r * Traffic lights can cause a chaos on the roads.* Also cause a huge traffic
I'm not sure that blue traffic lights are real. However, a blue light behind you means you just got pulled over.
No one really controlls the traffic lights. A computer system controls the traffic lights, and no humans are involved with controlling the traffic lights day in and day out. It is all automated these days.
The new traffic lights are now LED lights and do not ever burn out.
Yes, the word 'traffic lights' is a noun, a plural, compound noun; a word for things.
No, because traffic lights are charged, not naturally bright.
Traffic lights are made of part metal and part glass.
people can be colorblind. When the power goes out so do the traffic lights.
STOP LIGHTs
stop at the stop line