The aim of this work is to increase the efficiency of monitoring the movement parameters of railway vehicles through the use of an improved method for determining their coordinates within the rail circuit. For this purpose, an improved method is used to determine the secondary and primary parameters of the rail circuit in normal operation, with further use of the obtained value when determining the coordinates of the rail moving unit in the shunt mode of operation of the rail line.For this method, the operating mode of the rail circuit of the measuring section is first determined, which is based on determining its state behind the input impedance and involves performing in two stages: at the first stage, the state of the trip relay states that the rail circuit does not work in normal operation, and in the second stage, the shunt mode from the control mode is separated using the value of the input impedance of the rail line. The input impedance of the rail circuit is defined as the ratio of measured voltage and current at the beginning of the rail circuit of the measuring section.In the shunt mode of operation of the rail line, the coordinates are determined, and, if necessary, the speed and acceleration of the moving unit, which is located within the rail circuit. To increase the accuracy of determining these parameters, in the normal mode of operation of the rail circuit, the measured values of the current, voltage and phase shift between them, clarifies the values of the secondary parameters of the rail circuit by solving the inverse task. This method does not require a significant amount of computation and allows you to determine the secondary parameters of the rail line, and through them the resistance of its insulation.Using this method allows you to determine the coordinate, and if necessary - the speed and acceleration of the moving unit, which is located within the rail chain. The obtained parameters can be used to control the moving rail units between stations. The application of this method can also be useful when moving units approach railroad crossings in order to implement a fixed notification time. In addition, due to the use of the outlined model, it is also possible, in the control mode of operation, to determine the coordinate of damage to the rail line, which will reduce the time spent on identifying and eliminating damage.