The original title of this cache was "Northside Nortonville Nano," but after bikehammer found it and suggested it be part of his "0h No A Nano" series, I made the appropriate change. You are looking for... You guessed it: a nano magnetized to a street sign! With the hint I've provided, you shouldn't need much more information than that. Congratulations to Cargirl2, moliveri, and Allen-Ave-Budd-Club for being FTF!
EDIT 5/25/2024: The entire town of Nortonville essentially no longer exists. All houses along this stretch of Route 130 have been demolished to make room for more warehouses. Please take a moment of silence to honor the memory of this strange little “holler” and the first house I ever rented.