“Directional” means any of the four basic compass directions, abbreviated as follows: N, S, E, or W. If a predirectional is used, it is the first element of a street name.

“Primary address number” means the number assigned to a particular structure of property.

“Root street name” means all parts of a street name except the street type and, where applicable, the directional. Components of the root street name, including compass directions and street types that are part of the root, are never abbreviated. Numeric root names are an exception; they are always presented as numeric abbreviations except when they must be spelled out to be distinguished from nearby streets with duplicate names.

“Secondary address unit” means a designation of a particular subunit within a structure identified by a primary address number and street name. The secondary address unit consists of a designator presented as a standard abbreviation followed by a secondary address range of alphanumeric characters.

“Site address” means all elements necessary to identify a location in a given city; a site address consists of a primary address number, a street name and, in some cases, a secondary address unit.

“Street name” means the full name of a street, which includes the following elements: a root street name, a street type, and, in some cases, a directional.

“Street type” means a road or street type presented as a standard abbreviation following the root street name. The street type is the last element of the street name. Street types that occur in any other position are actually components of the root street name.