Road sign: “Stop, Listen and Look”

Who does not recognise the “Stop Listen and Look” road sign? At railway level crossings there is a sign, placed in the immediate vicinity, that warns of the dangers that trains pose. And it recommends that you “stop, listen and look” before crossing. Together with the "unguarded level crossing location" sign, it indicates the location of an unguarded level crossing. This is from an unused section of the Tua Line, next to Azibo Station (Portugal).