1. A method for planning a cellular radio network having a traffic control process, parameters, and a radio environment, comprising; creating a network model representing the cellular network and its radio environment on a digital map; adding system properties affecting the traffic control process of the cellular radio network in connection with said network model representing the cellular radio network and its radio environment for a route-specific operational simulation of the cellular radio network, including a plurality of simulation events; and optimizing the parameters of the cellular radio network and operationally optimizing the cellular network on the basis of statistical simulation results describing the operation of the cellular radio network.