Effective management of terrestrial transport in controlled and unmanned mode is impossible without its accurate and continuous positioning. The paper considers the possibility of increasing this accuracy in the absence or uncertain reception of signals from the satellites of the global navigation system. However, the use of an additional autonomous inertial system to solve this problem in this case is not justified for reasons of accuracy and cost. Therefore, a solution based on radar Doppler sensors as an alternative autonomous navigation system is proposed. Methods for measuring the speed vector and an algorithm for direct continuous measurement of displacements are considered. It is shown that the last measurement option can significantly reduce the cumulative error in the positioning of vehicles.