OK sure, for all of NSW it's 3700+ intersections [1] (for a state with about half the population of LA), and 11000 across Australia [2] (about double the popula

OK sure, for all of NSW it's 3700+ intersections [1] (for a state with about half the population of LA), and 11000 across Australia [2] (about double the population of LA) with the same technology. I can't find any reference that mentions every single intersection being hooked up, so I'll cede that one. A very large grid might be a pathological case where it makes sense to hook up every single intersection, but in terms of scale, it is not unique or ahead of it's time, like the SCATS system was. [1] http://www.rta.nsw.gov.au/usingroads/scats/index.html http://www.rta.nsw.gov.au/usingroads/scats/index.html [2] http://en.wikipedia.org/wiki/Scats http://en.wikipedia.org/wiki/Scats