Those are some good points you bring up!

With that being said, Regina doesn't really follow a strict quarter system in the same way that cities like Calgary do. For example, we don't refer to the avenues in the south as "Avenue S" - there is no "6th Avenue S", just a "6th Avenue" and a "6th Avenue N".

In addition, Regina also doesn't have numbered streets, just the avenues are numbered. There's no E/W designation there since the streets have completely different names (however, you will see them follow the same east-west position like numbered streets would - take a look at something like Argyle Street that is disconnected at many points).

A couple roads do have the East/West designation, but those are relatively rare, such as Dewdney Avenue/Dewdney Avenue East and Assiniboine Avenue/Assiniboine Avenue E. Even in this example, what counts as "east" is inconsistent.