There seem to be too many manhole covers in picture 4

Heya!

Are you sure that these are facing the wrong direction? eg do you have any reference?

I would assume that it is correct so pilots know where they are when they turn off the runway? Or do all of those signs say something runway releated?

Picture 1:
- the signs are clearly the wrong way round, as the floor markings are correct.

Picture 2:
- the sign on the right has the same content as on the left. When turning off a runway, different signs are used.

Picture 3:
- the sign on the left has the same content as the one on the right. When turning off a runway, different signs are used.

Picture 4:
- the sign on the right has the same content as on the left. When turning off a runway, different signs are used.
- there are too many manhole covers, it looks unrealistic

Cheers, will fix them 🙂