“…Definitely, the most common method of measurement in the conditions of real vehicle traffic is the method using a special mobile scientific and research apparatus of the PEMS type, appropriately installed in a vehicle [5,8,9,11,15,20,24,26,30]. It makes it possible to measure the con-centration of individual pollutants and the energy consumption of traffic, while measuring the mass flow rate of exhaust gases from a power unit.…”