Normative, technical document, in which the characteristics of every sign are gathered practically and precisely. This refers to their size, proportions, colors, design and used symbols. This publication arose as a consequence of the progressive introduction of new signs throughout time, as well as from the need of introducing some changes and additions derived from the update of certain signaling criteria. It also came from other modifications that gathered the changes necessary for unifying Spanish signals following the different European agreements, conventions, and recommendations on road signs.