Abstract: The invention relates to a method and an arrangement in mobile telecommunications systems comprising, on the one hand, one or more cells operating with channels/frequencies, which cells belong to one or more base stations, and, on the other, one or more first and second mobile units, for producing one or more first representations of traffic intensity within one or more geographic areas. One or more second mobile units are provided with elements for measuring and evaluating signal strength. The measurements are carried out at a number of geographic positions on transmission from one or more first mobile units to a base station. In those cases where the signal strength exceeds a predetermined value, this value is stored, together with information on frequencies and geographic positions. One or more second representations of the traffic intensity in a respective geographic position are established in dependence on the number of stored values which have been obtained when measuring at the geographic positions.