with a numerical system of street names (similar to Manhattan and the Bronx). Nearly all roadways oriented north–south are "Streets", while east–west roadways are "Avenues", beginning with the number 1 in the west for Streets and the north for Avenues. In some parts of the borough, several consecutive streets may share numbers (for instance, 72nd Street followed by 72nd Place and 72nd Lane, or 52nd Avenue followed by 52nd Road, 52nd Drive, and 52nd Court), often confusing non-residents. Also, incongruous alignments of street grids, unusual street paths due to geography, or other circumstances often lead to the skipping of numbers (for instance, on Ditmars Boulevard, 70th Street is followed by Hazen Street which is followed by 49th Street). Numbered roads tend to be residential, although numbered commercial streets are not rare. A fair number of streets that were country roads in the 18th and 19th centuries (especially major thoroughfares such as Northern Boulevard, Queens Boulevard, Hillside Avenue, and Jamaica Avenue) carry names rather than numbers, typically though not uniformly called "Boulevards" or "Parkways". Queens house numbering was designed to provide convenience in locating the address itself; the first half of a number in a Queens address refers to the nearest cross street, the second half refers to the house or lot number from where the street begins from that cross street, followed by the name of the street itself. For example, to find an address in Queens, 14-01 120th Street, one could ascertain from the address structure itself that the listed address is at the intersection of 14th Avenue and 120th Street and that the address must be closest to 14th Avenue rather than 15th Avenue, as it is the first lot on the block. This pattern does not stop when a street is named, assuming that there is an existing numbered cross-street. For example, Queens College is situated at 65–30 Kissena Boulevard, and is so named because the cross-street closest to the entrance is 65th Avenue. Many of the village street grids of Queens had only worded names, some were numbered according to local numbering schemes, and some had a mix of words and numbers. In the early 1920s, a "Philadelphia Plan" was instituted to overlay one numbered system upon the whole borough. The Topographical Bureau, Borough of Queens, worked out the details. Subway stations were only partly renamed, and some, including those along the IRT Flushing Line (),