Good things come in narrow packages

[tetters]

If I may, I don't think you'd want to force the perspective too much, otherwise, it might ruin the illusion. I like Wayne's idea to disguise the wall area...except maybe instead of another train bridge maybe a bridge for motor vehicles. I would think it would help give the illusion of distance you are looking for as the vehicle bridge by default is already smaller. Possibly connect to the road you have roughed in on the left there.

Did that make any sense?