Hi, thanks for pointing this out. Indeed, I neglected to look at the history on these ways; since they were highway=residential, and the geometry was quite bad in some places, I assumed that they had been neglected since the TIGER import.

Also, I had not made myself familiar with the Connecticut classification guidelines, which I should have done beforehand. I did not realize that it had such a strict stance towards tertiary and especially unclassified roads.

I've just sent a message in the OSMUS Slack about the situation, and tagged both you and jnighan in the thread. I'd appreciate any input on the topic (mainly whether to use highway=unclassified).