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Traffic congestion is a challenge facing many urban transport networks. While construction of new roads is not a viable option in many cities, improvement of public transport (PT) facilities can offer a solution. Introduction of exclusive lanes for PT vehicles is a green and low cost improvement which is focused in this paper. Many approaches in the literature devised an exclusive lane based on a local perspective and some other studies evaluated priority lanes on urban freeways. It is of great importance to develop methods for introduction of PT exclusive lanes from a network perspective and on arterial roads. In this study, a method is proposed to locate PT exclusive lanes in an urban transport network. Considering all the stakeholders of the transport network, a comprehensive transport planning model is used to evaluate a given set of exclusive lanes. In the transport planning model, a traffic assignment model and a transit assignment model is included to consider the primary effect of the prioritization, as well as a modal split model to capture the secondary effects of mode shift. A Genetic Algorithm approach is applied to find the optimal solution. The procedure is implemented by a powerful interface with a Visum and computational issues are addressed for a real world application.