The Planning and Development Review Department divides Austin's core into neighborhood planning areas, which mostly correspond to the boundaries of just one or two well-established neighborhood associations.
Austin's Parks and Recreation Department in its October 6, 2010, draft of its Long Range Plan appears to have revised its planning area definition, with Planning Area 9 corresponding to an area defined by Mopac on the west, 183 to the north, I-35 to the east and 2222 to the south, plus part of the North Lamar/Georgian Acres Combined NPA north of 183, and part of the North Loop NPA south of 2222.
[2] The civic organization Sustainable Neighborhoods of North Central Austin, which uses the term in its name, defines its territorial scope based on the boundaries of six neighborhood associations: Allandale, Brentwood, Crestview, Highland, North Shoal Creek, and Wooten.
[3] This definition mostly corresponds to a diamond of land bounded by the roads Mopac-183-I35-45th St.
This part of Austin is undivided by highways, and shares a common architecture due to the prevalence of post-World War II single-family housing.