A street sign in Greek

[cosmasad]

A street sign with the Speed Limit for a particular road would be called a "πινακίδα" or a "σήμα με ώριο ταχύτητας" not, please?

 

[daeman]

πινακίδα ορίου ταχύτητας

Σήμα ορίου ταχύτητας is usually a speed limit sticker (on trucks, buses and such) or a term for a digital signal in car systems.