Thanks for reply.

As I understand your reasoning, I'm not sure if I fully agree in this case, but I could be wrong. I think Penn Ave's function/role does change from a linking route to an urban street at Southern, and the physical nature of the road reflects that. However I get your point about the signed routes US 1 etc being trunk. Tbh, many of the hierarchies for the roads in DC feel off for me, and I wonder if this is just an instance that seems particularly off to me.

Let me go ahead and change it back though.