Homer Watson and Ottawa Three Lane Roundabouts

[panamaniac]

And how do they do it in other cities?  I always, always ignore the suffix because I figured it was stupid.  I didn't realize it had to do with addressing.  Is that really a "thing" everywhere in the world?

Not everywhere.  I lived three years in Panama without knowing for sure the name of my street (it did have one) or the street number (it didn't have one - in the absence of a postal delivery service, towers in Panama have names, not numbers).  It is a running joke in San Jose, Costa Rica that street directions run along the lines of "its left at the Pollo Alegre and 100 metres beyond the big tree that they cut down last year".  Many cities in South America have a system of numbered "avenues" that run in one direction and "streets" that run in another - every house address is sort of a trianglation of the two, with individual number for the houses, as in Canada.  God help you if they also have diagonals!  

Isn't Calgary divided into directional quadrants?  In that system, you need to know the directional suffix to even get to the right part of town.