This another of Melbourne's vintage W Class trams (see my previous post), in front of the Old Magistrate's Court on La Trobe St. The cryptic sign on the upper left "RIGHT TURN FROM LEFT ONLY" perplexes all except Melbourne's drivers.
This turn is called a "box turn" or "hook turn" and its explanation can be found here. It is mainly used to facilitate the through traffic of trams in the middle of the road (do remember that in Australia we drive on the left side of road!). Box turns are mainly found in City centre intersections.
This post is part of the "Sign, Signs" meme.