ITS THE GATES TO HELL!!! ;D

I wouldnt drop off any passengers there :o
Or rename yourself Caronte and do exactly that.

There are a pair of persons whom I'd like to bring on one of those Gates, actually.

Anyway, as first attempt see if deleting (moving away for safekeeping) the old FS9.CFG has any effect. Eventually, try and install updated video drivers. Should it still not have any positive reaction, try and unistall all the add-on scenery packages you have on one at time, beginning from the most recent and going back in time, and then see if the problem is over. One of those sceneries is obviously the culprit.
It's a bother, I know, but really there's no other way, that I know.