This is common in Philadelphia. There's a roughly square grid of streets, but then some parts of the grid are subdivided with north-south streets and some are

This is common in Philadelphia. There's a roughly square grid of streets, but then some parts of the grid are subdivided with north-south streets and some are subdivided with east-west streets, and which ones are which seems to be random. Streets that are in the same position in the street grid will have the same name, even if not contiguous. Various segments of Camac Street (which runs between 12th and 13th, roughly where "12+1/3 street" would be) are a good example: https://goo.gl/maps/eKGrA1ByHAbmWSx16 https://goo.gl/maps/eKGrA1ByHAbmWSx16