In this report, the main results of a world-wide survey on more than 320 bus operators in 46 countries, including 29 European countries, are presented. The data was collected on a number of operational indicators, most of them on bus fleet. Each of the indicators are introduced and further explained in this report, with graphs illustrating the findings. Since it was not possible to study all bus operators in the world, a sampling process was set up which ed us to the selected operators. Further information on the sampling can be provided upon request.