Public passenger transport (PPT) is an indispensable element of city life meeting the basic need for mobility. In this paper Data envelopment analysis (DEA) is used as a method to improve its functioning. This mathematical programming technique is successfully used to quantify the efficiency of companies in the manufacturing and service sector. The analytic process developed on the basis of this, using real input and output parameters, increases objectivity in the quantification of efficiency and helps to identify best practices. A PPT line in the network is seen as a Decision Making Unit (DMU) which achieves a certain level of efficiency, where quality is viewed from the perspective of users. The proposed model is implemented in the case of City of Niš.
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