Normative, technical document on the signaling, lighting and, if needed, defense of fixed works outside town that affect free circulation on the country’s road network. This institution develops the measures that shall be adapted to each occasion, in order to signal the works that are being conducted on roads, and that somehow make free vehicle circulation difficult. Other included measures are related to speed limits, closure of lanes and deviations to temporary lanes, including a catalogue of the signaling, lighting and defense elements that may be employed in said works signaling