This page lists of the various symbols in the Traffic signals group.
These warning signs indicate that traffic lights are ahead, and are often used when it is difficult to see that a traffic light may already be showing red, to warn a driver to prepare to slow down. They may be supplemented with flashing light or lighted sign when light is red or turning red. Some countries also have signs warning of signals for ramp meters, fire stations, and airfields.
Symbols in this group:
DOT CLUB SYMBOL (.club) proposed by openInvent see tiny.cc/openInvent1 for other webtails proposed for ANSI standardization