that page is a draft that i started in 2021. it's not intended to be prescriptive (not yet, anyway), but was an attempt at starting some discussion with the local mapping community to build consensus on a statewide standard.

the discussions never really took off, sadly. the framework of the page and class descriptions were copied from existing pages as a starting point. what little discussion has happened since then has been in favor of moving towards a "functional importance" trunk classification, rather than a "physical characteristics" one. for motorway characteristics, we have `expressway=yes`.

i'm not necessarily saying you're wrong. 47 doesn't always feel very "trunky" in every spot, but it does connect a couple of motorways and serves a massive amount of traffic. relative to the surrounding area, it has a much higher functional importance than other primary roads.

by all means, share your opinion on the wiki talk page, on the OSMUS Slack, or on the OSM Community boards. i would love to move closer to a real consensus of local mappers.