They are green so that a human's eyes will get distracted by the color and it will look at the sign.
On U.S. highways, green signs with white text are generally for navigational information: Upcoming exits and junctions, freeway entrance and exit signs, and street signs.
Green signs are not warning signs. They are signs that tell you it is "safe" to do something.
be prepared for workers and slow moving equipment
Emergency signs are in green. If you see "Emergency exit" signs, or "Emergency eyewash" signs etc.. They are always in bold letters and green.
To freeway to freeway to have to do what you do.
When you exit the freeway just follow the signs to the rental car return, and it will show where you go for each company.
You cannot advertise restaurants on Green signs. Green signs are usually for driver guidance. However you could advertise them on Blue signs which are designated for driver convenience. In some areas these are also green. I've also seen them brown. A sign shop maybe able to answer that question for you.
green
green machine
Green
Guide signs are large Rectangular green signs with white lettering that indicate distance and route direction. "A"
Guide signs are large Rectangular green signs with white lettering that indicate distance and route direction. "A"