In all areas not otherwise subject to 20.2.99.142 NMAC, regional emissions analyses must use those procedures described in 20.2.99.142 NMAC if the use of those procedures has been the previous practice of the MPO. Otherwise, areas not subject to 20.2.99.142 NMAC may estimate regional emissions using any appropriate methods that account for VMT growth by, for example, extrapolating historical VMT or projecting future VMT by considering growth in population and historical growth trends for VMT per person. These methods must also consider future economic activity, transit alternatives, and transportation system policies.
N.M. Admin. Code § 20.2.99.144