This is also a historic site, which is (or was and soon again will be) open to the public. Somewhere in there lies the historic Fort Supply, originally constructed circa 1868. It looks like the prison recently closed, the historic site is undergoing some sort of refurbishing, and I'm not sure what happened to the mental hospital or what else the state is doing with the site, especially its outermost reaches.

No. I don't understand those tags, and they don't seem to have clear documentation, so in general, I don't change them.

That way was a commercial landuse area. From the clues, it probably should have surrounded and not overlapped the building. I cannot say whether the landuse area or the building or both needed revision. The buildings come from a dataset (with some errors), but the areal imagery can have offsets and quirks, so it isn't typically easy to determine which to shift. Even global positioning system readers are imprecise too.

You are correct. My attempt to change "yes" to "university" obviously didn't work correctly.

Those are public lands (government-owned areas) that don't seem to fit in any other category. It's not easy to find them now that they've been deleted, but a more appropriate tag for the first might be boundary=water_protection_area if that's official, and the map shows it nowadays. The second area is airport authority property, but the university, not the airport authority, owns the airport, and most of the area lies across the street from the airport, so I wasn't sure how to classify it.

Westerly Parkway Plaza is private property, not a public street. So it's not appropriate (or legal) to drive on the parking aisles without business on the property or permission of the owner.

For the community field, I think that I was just trying to get the schoolyard perimeter correct. State College has a large number of overlapping area features that can make good edits difficult and complicated. The area looks mostly good now except the residential neighborhood boundaries.

The large prison area covered the entire grounds of the prison. I'm not sure how the state prison used the expansive grounds (water system, work areas, sewage system, gardens for agriculture, security perimeter, guard housing, wilderness survival experiences, and more are possibilities).

The wastewater plant probably got the "park" tag to make it show on the map. Wastewater plants now show on the map with a nice splotch of color, so that's no longer appropriate (if it ever was). The "bus guideway" probably was a bus-only area, although I don't see it, so I'm not sure.

I used this combination to make it show on the map. The renderer now shows a splotch of color for man_made=wastewater_plant alone, so I don't need to use the combination anymore.

I'm not sure. I traced the roads from Bing areal imagery. Previous data were very poorly aligned. I tried to follow the center of the road or the yellow line. Some of the imagery makes the roads look wavy, especially in areas of hilly or steep terrain, but some roads twist and turn in real life too. Today's imagery doesn't have this problem.

This is just the grounds of the institution named. The boundary comes from USGS topographic maps, and the state still owns the land. Obviously, there's a conflict with the prison, but it's not obvious to me where the boundary should be, so I went ahead and mapped both institutions.

The "floating bits" of "amenity=college" came from the "Virginia property lines" overlay in Open Street Map. The "park" (since deleted) was a property that City of Charlottesville owns with no obvious structures or use. It shows clearly in the city's gis viewer in the same color as other parks.
https://gisweb.charlottesville.org/GisViewer/

I'm not sure why the changeset covers most of the state; it may have something to do with affecting the university relation. This changeset mostly updates the university boundary on the far southwest end of the main portion of the university campus and makes some adjustments to roads in the area.

I removed those independent ways, and Rothrock State Forest now apparently closes again.

Driveway may not be the correct tag for "everything." Many of these roads are nonpublic roads that resemble driveways, not residential streets akin to those in urban neighborhoods. Many such roads don't correspond well to features that I can follow easily on aerial imagery.

The protected area tag does not render, so I attempted to get the map to show Black Kettle National Grassland. Adding those tags yielded the desired result. I'm not sure of the appropriate tags for this national grassland, but it should show on the map.

OK-37 carries two lanes in each direction at a speed at least 50 miles per hour. I didn't think of Tuttle as a proper terminus for a primary highway because of its relatively low urban population. I initially thought of upgrading to trunk because of the multiple-lane, high-speed highway. But the traffic signals suggested downgrading to secondary. I thought that I successfully downgraded OK-37 to secondary from I-44 to Tuttle, but that change apparently never completed.

I apologize for my mistake. Obviously, the short segments of trunk aren't appropriate, especially the one between Mustang Road (OK-4) and Sara Road.