A method and system. A common route is designated as a traveled route of a mobile device for a series of consecutive movements of the mobile device in a mobile network along a path of locations from an origin location of the path at an earliest activity of two or more activities of the mobile device to a destination location of the path at a latest activity of the two or more activities. A ratio is computed as a ratio of (i) a sum of a coverage area of a start cell in which one activity of the mobile device was initiated and a coverage area of an end cell in which the one activity of the mobile device was terminated to (ii) a distance between a centroid of the start cell and a centroid of the end cell such that the distance has a positive value. A confidence value as a function of the computed ratio is determined.