Now that you mentioned gauntlet track, Pete – I know a similar arrangement at Kaufungen: http://commons.wikimedia.org/wiki/File:Sechsschienengleis.JPG
This route is normally worked by one of Kassel's tram lines, but also sees occasional freight workings. These are routed through the central pair of running rails, while the trams – which are single-ended and have doors on the right-hand side only – use the outer pairs of rails closest to the platforms in either direction.
The Gemmenich Tunnel on the German-Belgian border is another such example, where freight trains with oversized loads must use the centre track, which overlaps the left-hand running rail of one of the outer tracks: http://en.wikipedia.org/wiki/File:GemmenicherTunnel03.JPG