I typically change the lanes tagging only if I've seen the roads myself. Thailand has very narrow sois and in this neighborhood, that's the case. If two cars must slow down before meeting on a road, I tag that road as lanes=1 even if there is a dividing line (as is often the case).

It's almost laughable that some of the sois in my neighborhood (and that one) have a lanes=2 tag because they are definitely not two-lane highways.

Happy New Year!