I would consider some form of around the walls with the work shop in the middle. Perhaps isolate the workshop with partitians and run a stub peninsula along 2 walls for an industrial area or stub passenger terminal.
Another option if the space is rectangular, put the workshop centered at one end and run the track through the shop against the wall, again along the walls layout.
You get the most square footage of layout in a given area if you go around the walls with 2-3 wide "shelves" vs making an island in the middle that is 4-6 ft wide (twice the shelf width).
