Does a Speed Advisory Sign issue a fine if u go over the limit?

[knight_dude91]

I Went over the limit and this thing was there, Do i get issued a fine or is this just to warn you only...
I placed the link of what i mean:
http://www.datasigns.com.au/Products/Radar-Signs/
http://www.youtube.com/watch?v=6ot13vPKcx0