Please avoid using Google Maps data as a source for mapping, as Google's Terms of Use prohibit users from using this data to produce other content: https://wiki.openstreetmap.org/wiki/Google

I would recommend that, if reliant on third-party websites for mapping, using government-provided GIS services like the Clark County OpenWeb, which is also more accurate than Google since copyrighted maps tend to add subtle quirks to catch users who copy data from the map: https://en.wikipedia.org/wiki/Trap_street

Nevada state traffic data can be found here: https://geohub-ndot.hub.arcgis.com/maps/85d32ba5e82d44988bdd16943be5f14a/explore

I will note that AADT should not be 100% relied on for classifying roads, and that connectivity with destinations and other major roadways, physical characteristics, etc. may end up playing a role in the classification judgement. For example, a relatively minor road or segment of a road in a commercial area may see more traffic than a some segments along a major arterial that spans the metro and has multiple connections with other major highways, or a major highway that heads out of town to other communities may see just as much traffic as a collector roads through residential areas. AADT is, however, still a good tool for determining how these roads are used to get places.