Path loss models are important to predict interference and encourage coexistence between systems in border regions. The propagation losses in VHF and UHF experienced for the Amazonian region does not follow traditional propagation models according to measured data. This paper presents a deeply study over long-range and foliage propagation models and compares them with empirical data obtained in the border of Colombia and Brazil. The study advises that neither long range nor vegetation models are applicable for the considered region, leading to a combined model. The proposed model presents an equilibrium between long range empirical models and forest models where an urban-vegetation index is included to compare the factors between the two components. Results show that the proposed model follows the behaviour found in other studies where lateral wave predominated and presents high accuracy with the measured data.