Carto (standard view) doesn't have rendering support for busways, but this doesn't mean it should be reverted: https://wiki.openstreetmap.org/wiki/Tagging_for_the_renderer

TLDR; the accurate tagging should remain, since it's significantly more accurate and we'll accepted, even though it doesn't show up on the map. "Highway= Busway" in particular is the overhwelming standard for mapping transitways across the world, and anything else is uncommon and usually actively misleading. Many people have tried to add rendering support to it in Carto, but they haven't gotten past code scrutiny (it's a lot more complicated and involved to program for than it may seem!).

Traceback topo, transport map, cycle osm, humanitarian, OSMand, and likely organic maps all render it correctly, if you'd like to see it. Note on OSMand: the maps are updated once monthly, and so it will still show the old service roads. They'll turn blue when the updated transitway gets in