Just got a reply back from polaris world customer services. They say:
I will explain it for you:
The road which is close to it, is called "Las Cañadas", which is similar to "path between two mountains" or "cattle track". "Puerta" means "door/entrance". And "Sur" means "south".
As there are four different entrances, the sign of each entrance includes the words "Door", then the name of the corresponding road (in this case Las Cañadas), and whether it is south or east, etc.
Entrance "Cattle Track" South
Please do not hesitate to contact us again, should you need any further assistance!
Its all clear as mud now!