This paper is devoted to modelling of intelligent braking diagnostics system of railway transport. Nowadays human factor plays a significant role in control of railway system in a whole and a rolling stock in particularly. The task is to prevent such accidents by reducing the human factor. In this paper artificial neural network controller, mathematical models and clustering algorithm for task solution is proposed. Results of experiment show the possibility to use neural network controller for speed control of DC drive depending on the distance to stop. The results show the possibility of the developed systems to prevent accidents and to avoid different problems by intelligent diagnostic and coordination devices. Neural network may be used to prevent breakdowns and accidents and such kind of controllers may be integrated in working infrastructure for optimal speed control of railway traffic.