
Now...I'd really if someone familiar with military hardware and/or a civil engineer could give me some hint on a couple of things:
I would like to add a shell-hole/ man made trench beside the truck wreck. This hole would be pictured in my diorama as a last stand ditch for the german defenders to use their panzerfaust and I'd probably place a casuality next to it.
But to break it down a little, first I'd like to know if an artillery shell could create a crater on a paved road or asphalt road. I ask this because I looked at many pictures of Berlin and even if all the buildings are down from artillery and air raid I never see a crater on the streets

And second, I wonder if the U-bahn tunnel would run parralel and right under the street? If the defenders dig a trench would they find the concrete top of the U-bahn very soon? Or would there be aqueduct and sewer pipes above the U-bahn box? Or could the U-bahn tunnel run parralel to the street but not directly under it, so that a shell-hole would just uncover water and sewer pipes?
the hatched region is where I'd like to place the hole

I know I ask a lot of question all at once but I'm sure someone knows a part of the answer

Thanks in advance
Phil