Nope, no rhyme or reason to it here. Avenues and streets seem to come up randomly. Sometimes it seems like more major roads are called “avenue”, but even that doesn’t explain all of them. I was fascinated by the system used in Portland, OR, where the city is divided into quadrants and each street contains a NW NE SW SE in its name which will tell you what quadrant of the city you’re in. Then in Phoenix you have the same street names carrying for miles along a certain latitude even if the streets are not all connected. The craziest is Salt Lake City where the streets are just numbers with no street designation, like 6700 W. I live at 15200 6700 W. That must be a fun address to tell people.