Technically, it's an abandoned vehicle according to the muni code.

Sec. 12-7002. - DEFINITIONS.

For purposes of this chapter, certain words and terms are defined as follows:
(a)Abandoned vehicle.
An abandoned motor vehicle is one that is:
(1) Left upon a public street or highway in violation of a law or ordinance prohibiting parking; or
(2) Left on a public street or highway for longer than seven (7) days; or
(3) Left on property owned or operated by the City for longer than twenty-four (24) hours; or
(4) Left on private property without the consent of the owner, occupant or lessee thereof, for longer than two (2) hours.

http://library.municode.com/index.aspx?clientID=10312&stateID=33&statename=North%20Carolina