Woah. Okay, two things to talk about...
Bridge. I <3 it. This is just enough that a modeller needs to get that bridge working. Thank you for that zoom in box. I think I can add some more instruction for the one who claims it... Make a new mesh except that upper part which can be just copied from the walls. Try adding some new textures for the bridge to make it not too much simillar to the walls set. And yes, of course. Modular(cut it in the middle of the pillars). Set should include:
-Long bridge part(middle of the second drawing)
-Short bridge part(the ones on the side of the long part obviously

)
-Bridge end(the floor of it should be under a degree.)
Gatehouse. I already thought about it... Some months ago

Well, do we really need it? First thing, it overrides the things that were instructed to me by el scumbago(I'm not really sure why it was so important, but still). The gate was supposed to have towers on the sides, and that's currently how both gate varations are made. They have towers included. How do you imagine the interior? Currently it looks to me like a block with two big gates on both sides. IMHO it would be better to make a use of the towers and make interiors for it or just put a guardhouse in, or outside the city.
PoHa: how can we best this trio of trouble? who will save us from this menace of sub-par models? what will we do?
PoHa: I know! we'll shoot an Aro at them
Aro: you have only one Aro missile!
PoHa: yes, but its heat seeking and quite possibly indestructible
How to do not become a modeller - by Stryker:
[00:13:]Stryker: no tutorial, no no no