This work analyzes the impact of incorporating waterbus routes into the existing public transport network by means of implementing macroscopic simulation models. The research is carries out following a classic 4-stages structure: analysis, design, construction, and validation. During the construction, the classical 4-step travel forecast model was applied. Initially a base model to represent the actual public transport network of Valdivia (Chile) is constructed. Updated origin-destination matrices along with new measurements taken in-situ were used to calibrate and validate the virtual model. Then a second model that includes the proposed waterbus routes is constructed. Both models were implemented in PTV Visum. Simulation results revealed that only a fraction that barely reached a 1.8% of all trips was made through the proposed water bus routes. In conclusion, with an estimated error of 9.3%, the work suggest that the proposed waterbus routes might be a complement to the existing transport network, but they would not be the traveler’s favorite option.