Green signs are not warning signs. They are signs that tell you it is "safe" to do something.
What are the signs of apocalypse? He gave me weird Signs.
Young And Fresh; Green
it's heed, and it means pay attention to.
12 Signs of the Zodiac
Accolades are signs or gestures of praise.
I'm pretty positive Diamond shapes signs are warning signs.
there are no warning signs
warning- use caution
The most common color of warning signs is yellow.
It depends on what warning signs that you are interested in. Many sites offer guides on how to spot the warning signs for illnesses etc. If it is to do with motoring check the highway site for details.
Green traffic signs usually indicate directions. Exit and Entrance signs for the expressway, distances to cities and towns, mile markers, etc.
US standard traffic warning signs are yellow background with black symbols or letters. Traffic warning signs in other countries are generally white or yellow background with a red or black border in a triangular shape. Industrial warning signs are various colors, including OSHA and ANZI standards with orange background and black lettering. A yellow OSHA or ANZI sign would mean "caution" not "warning".
Early warning signs of storms and precautions
General Warning: Exercise Extreme Caution
There are many warning signs of pregnancy. Some warning signs include tingling nipples, spotting, cramping, morning sickness, swollen breasts, a missed period, and/or darkened nipples.
It would help if you had a specific symbol that concerned you. Most are self explanatory
Warning signs are usually a sign that something will be or has the possibility of occurring. They are also called symptoms when dealing with sickness.