Speed is an essential parameter in describing traffic conditions in the transport network. This parameter can be used to
estimate the quality of travelling in the area. Moreover, with the development of intelligent transport systems, vehicle speed and
vehicle flow play an important role in advanced traffic management systems. The speed, along with other parameters, such as
traffic flow, provide information about the current situation in the transport network. This issue also applies to public transport,
for which the estimation of travel time, including the speed, is necessary for the dynamic transmission of reliable information to
passenger information systems. This allows passengers to be kept informed about the arrival times of particular vehicles, thus
enabling them to plan possible alternative itineraries, therefore saving time. Information about the variability of travel time on the
various sections of the network is also useful for the transport operator’s control.