The concept of concurrency is based on the maintenance of specified levels of service with respect to roadway facilities. Concurrency regulations require that adequate facilities must be available when the impacts of development occur or within six years from the time of development. (Ord. 2014 § 1 (Exh. A), 2009; Ord. 1946 § 4, 2005; Ord. 1654 § 2, 1996; Ord. 1633 § 1, 1996).