The investigation and modelling of traffic processes in large-scale road networks is a priority task. A key task is the investigation and modelling of traffic processes in large road networks. Its role is also highlighted due to its economic, social, traffic safety and environmental significance. This is indeed a very complex research and practical task. The research topic is also important because of the environmental changes affecting vehicles participating in traffic, which have an impact on road traffic processes and their regulation. The modelling of large-scale transport networks and their processes is accompanied by numerous challenges, which require special attention and experience in all aspects. In this publication, we deal with parameter analysis related to velocity processes along a trajectory.