Hello!
thanks for raising this point! I meant to further enquire about how to best reflect the reality of this feature, but forgot.
There is a gate, guarded by soldiers/military police. It seems to be open most of the time, if not always, but the guards sometimes check vehicles. There is a sign stating that foreigners are not allowed beyond this point. And indeed, if you are identified as foreigner, you cannot pass. I don't what restrictions exist for local citizens.
Perhaps instead of marking the note as gate/barrier, it is more meaningful to make it a police checkpost?