AFCAD Runway Data

Hey everyone- I was fooling around with some addon AFCAD files for Atlanta's Hartsfield, and I noticed this box...

What exactly is the point of this? Does changing the runway surface affect anything?
Thanks in advance- bm
PS- I know, my arrows are the best you've ever seen


What exactly is the point of this? Does changing the runway surface affect anything?
Thanks in advance- bm

PS- I know, my arrows are the best you've ever seen

