[Tagging] How to tag an unsigned bike lane?

[Nathan Edgars II]

Around here there are a few roads that have spaces striped as if they
were bike lanes, but they're not actually marked as such, so they
don't fall under the mandatory bike lane law ("shall ride in the lane
marked for bicycle use"). But those cyclists who like bike lanes will
see them as a good thing, and will want them tagged as such. So how
should they be tagged? (This isn't the same as the shoulder issue,
where some cyclists like using a lane designed for another use; these
are clearly designed as bike lanes, just not marked.)