I understand these aren't residential roads, yet the guidance I read advised there was no designation for a commercial vs a residential road, and if the road was a main access road for the campus they should be tagged as residential roads. I thought that sounded odd as well.

I'm trying to find a solution that works and is acceptable to standards. If that means testing different tags for a day or two that shouldn't be cause for alarm.

How often does the OSM data update. I'm still getting routed around that parking lot.

Because a Claude AI analysis identified this as a known OSM glitch where highway:service tags caused such routing issues.

Ahh... good to know. Thanks for the reference, I'll study it.