As far as another clean out, I usually only see one or the other. Close or far.
But sometimes towns will come through and add free clean outs near the sidewalk as a big project for whole neighborhoods.
This helps to clear out roots from parkway trees, and also access the line back to the house.
Even if the homeowner already had one near the house, which was probably added after a sewer repair from roots, or broken pipe or tiles from settling.
Pros will have more info.