(1) “Rural addressing system” means the type of addressing system in which addresses are determined based on their distance from the origin of the road.

(2) “Urban addressing system” means the type of addressing system in which addresses are determined by rectangular coordinates from established base lines.

(3) “Urban address grid” means an area addressed with an urban addressing system.

(4) “Urban grid boundary” means the perimeter of an area addressed using an urban addressing system, outside of which rural addressing is used.

(5) “Primary access” means the driveway or other access to a given site most likely to be recognized and used, especially by emergency service providers.

(6) Address Road. For each addressed site, the “address road” will be the road on which the primary access for that site originates.

(7) Road Origin. For the purpose of address determination measurements, each public and private road shall have an “origin” designated in accordance with CCC 19.40.030(1)(c).

(8) “False origin” refers to the addition of a fixed distance to all measurements made on a given road, as if that road originated at a different point. It may be used adjacent to an urban address grid such that a road which does not originate at the grid baseline will be projected back to the baseline and measured as if it did originate at the baseline. The purpose of using a false origin will be to prevent address number conflicts around an urban address grid.

(9) “Permanent milepost” means a sign placed along a road showing the distance in miles from that road’s origin to the milepost. Except as indicators of a road origin, mileposts will generally be placed precisely at one mile intervals from the road origin to the end of the road.

(10) “Address distance” means the distance, for address purposes, from the designated origin (or false origin) of the road. Once defined, this distance will not change, even if the actual distance changes due to road alignment changes.

(11) “Private road” means any road other than County roads or Federal or State routes.