Two Arrow Emergency Exit sign???

https://www.safetysupplywarehouse.com/Green_Exit_PF50_Series_Glo_Brite_Eco_Exit_Sign_p/g7040.htm

So yesterday while walking by Union Station's train lobby/concourse hall, I came noticed at least five emergency exit signs with two arrows.

This isn't uncommon as it is often seen in other buildings also. My only question is, why is this a thing???

Seriously. This is a little example of what would happen in a fire emergency:

1)
I need to get out!

2)
Thank god! An exit sign!

3)
What? Two arrows on the exit sign? WHICH WAY SHOULD I GO? WHICH WAY IS FASTER?

4)...........^ The writer of this blog has died from the fire because he couldn't come to a decision quick enough for which exit route to follow.