My idea was, if possible, just like in Def Jam's subway map, that trains would pass from time to time and instant kill anyone on the tracks as they pass. Also those barrels were just to spice things up, lol, if unnecessary, we'll just scrap that out. Anyway, if anyone want to do a quick visit (although the following screenshot pretty much sums it up), here's the wad file (I used textures from the mod, so you'll have to load up doomfightersmapsv2.6.wad as well).
Spoiler: Screenshot (Open)Anyone is free to edit it as much as they want (or again, start from scratch), if the idea itself is made then I'll be more than happy, ^^ If the trains idea is a no go, then a subway map will just do it and I would still be happy with that!