Besides, the definition has been applied to Colombia, where 54 FUAs have been identified (Sanchez-Serra, 2016). The new typology classifies TL3 regions into metropolitan if more than 50% of the regional population live in a FUA of at least 250 thousand inhabitants (and as Large metro TL3 region (MR-L), if more than 50% of its population lives in a FUA of at least 1.5 million inhabitants or Metro TL3 region (MR-M)), and non-metropolitan otherwise. Non-metropolitan TL3 regions (NMR) are further classified according to their level of access to FUAs of different sizes into: With access to a metro TL3 region (NMR-M), With access to a small/medium city TL3 region (NMR-S), and Remote TL3 region (NMR-R).