Article 113 Warnings from other vehicles
In accordance with the provisions of article 71, drivers of vehicles intended for works or services and those of tractors and agricultural machinery and other special vehicles or transports shall notify their presence by means of the use of the light signal V-2 referred to in Article 173, or through the use of lighting as determined in the regulations governing vehicles.
In 2018 the law was changed so that all emergency service vehicles would use blue lights. Prior to this change, only the security services used blue flashing lights when responding to an emergency, now the police, Guardia Civil, fire, ambulance, and civil protection all use blue lights. Note: The owners of these vehicles have 2 years to change to blue lights.