This submitted dissertation work deals with fuel consumption measurements at buses. It describes variety of driving cycles, basic calculative corrections, setting-up driving tolerances and application range. Special focus is paid to agreement of UITP-SORT procedures. The experimental part of dissertation work explains credibility of measurements, especially concerns traffic delay at measurement and describes additional corrections under different weather conditions. We compared results from fuel measurement device with readings from CAN messages, provided by engine control unit. Specific part is devoted to measuring influence of different auxiliary devices, like air compressor, servo steering, air condition, ventilation or cooling fan and influence of electrical load at vehicle systems. There is also is discussed an influence of driving style of specific drivers and autopilot.