Almost a month after moving in, I’m finally settled into my new place. I assumed I was living on Antrim Street, but apparently, according to the sign at the corner, it’s “Antrim At.”

Can someone tell me what that might mean? I’ve looked at a list of “Acceptable Abbreviations Used on Traffic Signs,” with no luck. I can’t believe it’s just a mistake, though; it’s in clear letters, on both sides of the sign. Is it a huge, permanent, highly visible and weatherproof typo? Impressive.