(This is one of a weekly series of posts entitled “Highway Feature of the Week”. The complete collection of Highway Features of the Week is available on a single page, or via a special RSS feed.)
Sadly, roadgeek-oriented information about Rio is somewhat lacking. So, unfortunately, I probably don’t appreciate the significance of this week’s highway feature. But hey, it looked interesting, and that’s good enough for me. 
![[Please visit my site to see the map that would otherwise be embedded here]](http://www.triskele.com/images/map.gif)