I think most counties in Utah use a numbering system surrounding their “main street” I don’t actually know what the focal point is in Logan or Provo for example, but I do know that Temple Square is the central point in Salt Lake city and its surrounding areas.
Surrounding Temple Square are four streets called South Temple, West Temple, North Temple and Main Street. Each street is numbered thereafter according to whatever direction – but starting in the three digits.
For example 1st north is also 100 north. I know, it’s confusing for those who don’t drive it everyday, but for those of us who live here, it is what it is. So if I grew up on 311 E 7980 S, I would be approximately 80 blocks south of the temple and a little over 3 blocks east.
My mom grew up in San Francisco but still had family in Utah. She used to feel sorry for children in Utah having to learn a difficult address like 2530 S 500 E or 1575 W 1000 N. It wasn’t until after she moved to Utah that she found that it was easier to find an address based upon the number. And for the most part, it is.
Some streets have names. Our 100 east is more commonly referred to as State Street. I don’t know if it was ever called 100 East or if residents of Salt Lake even know it as 100 East. There was a time in history that State Street actually went from the capitol of Salt Lake to the county seat in St. George.
But with the freeway system and highways and new growth, State Street has been broken up into pieces and so you may still find parts of it in other counties, but I think the longest stretch is from the capitol building to Sandy or Draper. There are parts of it in Provo, American Fork, Fountain Green and St. George for instance – but they are all relatively short in comparison. They are all really part of the same street – it just doesn’t lead the entire distance as it had over a century ago.