Mellow Yellow: Fire evacuation sign

http://mellowyellowmonday.blogspot.com/
I was interested to see this sign at a shopping mall at Massey.

Once I was with my uncle D. and Gab. We had just entered a shopping mall when loud alarm bells sounded. There were no security guards or fire marshalls to tell the shoppers what to do. Some left, and some just stayed. After a while, we heard fire appliances. Uncle D said, it was time to go. By then, the car park was full of cars causing quite a jam. I don't remember seeing this shopping mall with a evacuation sign.