I think many of the trunk VS motorway VS primary conflicts come from 2 points of view: on the one hand, people like to zoom out and see a coherent network of interconnected roads. On the other side, there is the group that prefers the road be classed according to its regional characteristics, and not necessarily in the same class for its entire designated span.

On 12/16/2019 7:54 PM, Evin Fairchild wrote:
>Personally I think US highways should be tagged as trunk roads in most cases

In the end, this would suffer from the same connectivity issue: should the US highway remain a trunk as it reduces to 2 lanes and drops to 30mph passing through a tourist area? Would that tend to draw GPS navigation routes from nearby faster, parallel streets? Or would it look like an ugly gap in the trunk road if it switched to primary in that tourist area?

As an aside, I sense that the tendency to upgrade results in all OSM streets being promoted by one level, resulting in a compression at the top end and less class distinction at those levels. But because of the subjective issues I just let it happen rather than re-edit any such changes unless they are massively changing everything in a region.


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