Got some questions about it recently after using the walker on Belgrad. So here is how!
You can enter the center of Belgrad by using these small gaps to step over the wall. You can usually mow down 1 wave of medics before everyone respawns as engineer to hunt your ass down.
Additionally you can also try to recapture statue sitting in your walker stepping over this gap.
Thanks for this, didn't think to try to go over these. Both situations though can be dangerous without infantry backup. The comm base is covered in trees limiting what you can see and who you can kill. And the statue would limit your movement if someone was to orbital strike the area. You would be forced to find your way back to the gap.
Just the other night someone brought the walker in the wooded area and lasted quite some time. The trees did make a difference because we were able to hide around the comm station, but it definitely made it easier for the infantry to get close.