Okay... Well, what should be done about the dangling spur? Should this portion of US 93 Business even be considered a motorway at all? IMO, the only thing it has going for itself being a motorway is that it has two grade-separated interchanges. There are no "Freeway entrance" or "Freeway ends" signs anywhere on the route, not even a yellow advisory sign like I-215/Lake Mead Parkway does. What should be done, with all this information in mind?

Alrighty then. I'll change it back.

It's alright! I went ahead and re-added it to the boundary relation.

Hello, why did you downgrade this portion of Lake Mead Parkway to primary? Just west of the intersection is a sign labeled "EXIT ONLY," implying that the road is a freeway rather than an arterial road.

I don't recall deleting any place nodes? The Goodsprings node still exists. Sometimes, there were places nodes and boundary ways that weren't connected via a relation, so I connected them. Other times, a node existed without a boundary (like Nelson), so I created the boundary way. Other times, the boundary existed without a node (like Indian Springs), so I created the node and connected it to the way via a relation. Can you provide specif examples of me deleting place nodes? Once again, I don't remember doing any of that, just defining boundaries and adding them to relations.

Alrighty. The portion between Charleston and Sahara is notably wider than the portion between Sahara and Vegas Valley and traverses residential areas. Plus, if I recall correctly, the bus route portion of Charleston continues onto Sahara for a little bit.

Hello, why did you upgrade Tree Line Drive to secondary? Sloan Lane and Vegas Valley Drive are at least longer and provide an alternate route between Sahara and Desert Inn. But Tree Line Drive is not as wide as the former two and runs through a residential area. Though I was unable to find traffic data for the route, RTC bus route 206 (Charleston) has its eastern terminus at Tree Line Drive. So, what gives? Thanks.

Because "County Road x" (where x is a number) is a highway designation, not an actual name. Sometimes, the county routes have an actual name tagged in their "alt_name," which I used as their actual name.

I didn't reroute any of the county roads, at least I don't think I did. I found it like this when I started editing the area.

Okay, I'll revert this, too.

I noticed a bit too late...
I'll manually check every road route relation in the county and remove the duplicates.

In that case, why does the primary designation end at Eastgate Road in particular?

Oh, okay then.

@limes11 It was a wrong sign error, as I completely forgot that new IDs should be saved with negative numbers.

I apologize severely. I used Overpass Turbo and JOSM to edit them. I used a Python script to find all highways in a bounding box (in this case, Weld County) to create new road route relations. As I only had data from that box, I had no idea that I was adding these routes to different relations, so I deeply apologize; I did not mean to break half the world. I will fix the script to make the relation IDs negative so they don't mess up any existing relations. Once again, I'm very sorry, and I hope you understand. Thank you.

Okay. I've only been to Reno once, so I'm not as familiar with its road network as I am with Las Vegas's xD.
Speaking of Lake Mead Parkway and Boulevard, I did connect their primary classifications because, as you mentioned earlier, it's one of the only roads that can access Lake Mead, and having Lake Mead Parkway's primary classification just end at a random intersection felt off to me. Is there a reason the primary designation ended at Lake Las Vegas Parkway specifically?

Okay, I'll go change it back.

Okay, I will fix these.

Okay, I will keep this in mind next time. Thank you!

Okay, I will fix them once I regain access to JOSM. If an entity's boundaries (say, a suburb) is defined with bi-directional roads (such as The Lakes), would it then be appropriate to tag the road as an outer part of the relation? Because the alternative—draw a new way such that it perfectly overlaps with the road—is, in my opinion, more of a pain when I, for example, hide landuse features and boundaries because I only want to edit traffic roads. iD will prevent you from editing the road because it's connected to a hidden feature.