The requirement to develop and adopt both long range and short range programs as a prerequisite to road construction is established in RCW 36.79.080, 36.81.121 and 36.81.130. Numerous studies have shown that road construction needs far exceed available revenue. Priority programming is the development and application of techniques designed to rank any array of potential projects in order of importance to serve as a guide in assisting a county legislative authority in the formulation of road programs and distribution of limited resources. Priority programming procedures for counties must be adaptable to a wide variety of situations.