🚀 go-pugleaf

That link was impossible - it included multiple levels of referrals, 
google search, etc. Is this the image you mean?

http://snipurl.com/4lrr9

If so, I can't find an exact match, and can't find a website that 
talks specifically about Australian road signage There are lots of 
images, though, including some vector images in this Australian Road 
Rules pdf (2.6MB to download):
http://www.ntc.gov.au/filemedia/Reports/AustralianRoadRulesFebruary2008.pdf

While it talks about the content of signs, it says nothing about the 
typography.

The signage has lots of similarities to good old Helvetica (except for 
the M), and to others, including "Outer Loop NF" from Nicksfonts, and 
some variants of Clearview.

Even closer, except for the Oh's Zeroes and Eights, are some of 
Michael Adams' Roadgeek fonts, particularly the Roadgeek 2005 series E 
and F.  As FONTS they're not up to professional standards, but the 
designs are extremely accurate.
http://www.triskele.com/roadgeek-fonts

  - Herb