Most American cities use a distance or block system.
Most European cities use the odd/even system. Each plot increase by two on either side, so one side of the road has 1,3,5… and the other has 2,4,6…
If a plot is later subdivided or more houses are built on a plot, its new addresses will get post-fixed letters a,b,c,d…












It’s hidden from view in this picture, but there’s a wider drain pipe in the center.
https://panhytter.no/vare-hytter/