[bombcar]

I think the big problem is nobody knows what the heck they’ve encountered.

If you do it naturally people can figure it out: make the road very narrow but technically wide enough for two cars and people will hug the center naturally.

[gpm]

Just don't draw any lines and even on wide (>2 cars) roads people seem to hug the center pretty naturally (IME, there are probably cultural differences between how people drive in different places that matter here).

The strange part about this road is that there were so many lines by the edge of the road, that's legitimately pretty confusing. I'm not sure if it's confusing in an unsafe way, but it's definitely uncomfortable.

I'd love to know if someone has a link to someone knowledgeable comparing "all these lines for edge lanes" to "just don't draw anything".

[bombcar]

I suspect lines really are only needed when you want to fit maximum lanes in a given space - many of the four lane roads here would turn into one lane each way without lines.

[Pxtl]

Yeah, I think the "North American" way to make this design coherent would be frequent sharrows markers, low speed limits, and no other lane markings. The sharrows markers would make it clear "yes cyclists are supposed to be there" and the lack of lane markings would make it clear "shift left as you need".