Why are some regional level crossing sings a Saint Andrew's Cross? Is there a historical explanation for this?

Question

See for example the Cross at http://www.soundandvision.be/rijbewijs/wegwet/afbeeldingen/wegwet70a.JPG

Answer 1

I had not seen that cross on a crossing signal before. Interesting. My guess, (and this is ONLY a guess) is that someone thought it might be a bit better at getting peoples' attention and providing a small degree of extra safety. Crossing protection doesnt work if people dont see it.

Answer 2

An interesting query... I checked several websites on Symbology and found nothing specific THERE.

Here is an article on the Cross-buck: http://en.wikipedia.org/wiki/Crossbuck