Abstract: The present invention relates to a method for predicting the availability of a mobile telephone network, and a computer program and a system for this. In order to create a method that does not rely on existing network coverage maps or existing statistical data, the present invention proposes a method for predicting the availability of a mobile telephone network comprising the following steps: acquiring identification information from the mobile telephone network for at least one road user connected to the mobile telephone network; storing the information in a memory; sorting the stored information according to at least one sorting criterion; and using an algorithm to calculate a location and time dependent probability of the availability of the mobile telephone network based on the sorted information.