"County" means a county in which the secondary state highway system is constructed and maintained by the Department and that has adopted a local ordinance for control of the development of subdivision streets to the necessary standards for acceptance into the secondary state highway system.
"Qualifying rural addition cost" means that portion of the estimated engineering and construction cost to improve the street to the minimum standards for acceptance remaining after reducing the total estimated cost by any prorated amount deemed the responsibility of others based on speculative interests.
"Rural addition funds" means those funds reserved from the county's annual allocation of secondary state highway system construction funds, as defined in § 33.2-324, for the purpose of this section. If such funds are not used by such county for such purpose during the fiscal year they are so allocated, the funds may be held for such purpose for the four succeeding fiscal years. A maximum of five percent of the annual secondary state system highway construction allocation may be reserved by the local governing body for rural additions.
"Speculative interest" means that the original developer or a successor developer retains ownership in any lot abutting such street for development or speculative purposes. In instances where it is determined that speculative interest is retained by the original developer, developers, or successor developers and the governing body of the county deems that extenuating circumstances exist, the governing body of the county shall require a pro rata participation by such original developer, developers, or successor developers as prescribed in subsection D as a condition of the county's recommendation pursuant to this section.
"Street" means a street or highway shown on a plat that has been recorded or otherwise opened to public use and used by motor vehicles for at least 20 years and that, for any reason, has not been taken into the secondary state highway system and serves at least three families per mile.
Va. Code § 33.2-335