The organization of public transport greatly contributes to the proper traffic management policy of vehicles. They are an active element cooperating with the infrastructure. However, the organization of transport is not an easy task. The constantly changing demand on lines characterized by various length and intensity of use makes it difficult to decide on the choice of vehicle. Vehicles with various technical and functional parameters along with a specific frequency of running create an offer for users which is not always adapted to their needs. All the changes affecting the functioning of the rolling stock are reflected in the costs of the communication company. Analysis of the company's operations allows to identify some areas that can be optimized. The savings concern lower fuel consumption by adjusting the capacity and type of vehicle used.