It is a relatively new signal
The General Directorate of Traffic (DGT) usually implements new signs from time to time to reduce the number of deaths on the road, whether due to accidents or poor signage. In this sense, you may have encountered while driving a series of yellow triangles and whitean adaptation of dragon teeth, the meaning of which is that we are passing through a busy areaWhether it’s a school or a downtown street, to force us to slow down noticeably.
In Madrid there are already several areas of the city with these yellow and white triangles on the streets. Besides, the vertical school zone sign and the graffiti that forces us to reduce speed to just 20 km/h complete these ‘tricks’ that aim to reduce the number of accidents that occur in large cities.
Although this type of signals came into operation a little over a year ago, The big problem it has is that many drivers do not know its meaning.so despite being installed on public roads, they do not work correctly.
Regular users and drivers are not informed about the new signs that the DGT implements on the roads, thus causing an even greater problem of insecurity behind the wheel. A greater number of awareness campaigns would be needed to receive the information correctly.