Green signs are not warning signs. They are signs that tell you it is "safe" to do something.
Relationship Warning Signs
Usually they say "warning" on them, in bright red and white.
I'm pretty positive Diamond shapes signs are warning signs.
More eye catching color.
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".
there are no warning signs
regulate
warning- use caution
Vw jetta 2000 dashboard warning light is red similar to a sailboat symbol. What does this mean?
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.
By range, I assume you meant on a firing range? Warning signs and signals (often the signal is a red flag warning that firing is about to occur) is there to lessen the risk of a firing accident. Anyone ignoring a warning sign could be putting themselves in danger of being maimed or killed by a ricochetting bullet, etc.