A new type of road sign has begun to appear in some countries in Europe. It is a round sign with a green frame that recommends a speed on a given section of the road. However, it turns out that this sign actually duplicates a similar square sign on a blue background (it is also present in the Bulgarian traffic rules).
Therefore, despite the appearance of such a sign (currently on Spanish and British roads) it is still not considered officially legal. This is also the opinion of the DGT (Directorate General of the Spanish Department of Transport), quoted by Motorpasion .