The research paper deals with the formation of new scientific solutions regarding the assessment of the impact of stimulating innovation activity on ensuring the strategic development of enterprises in the motor transport sector of transport industries in key countries of the post-Soviet economic space (Ukraine, Russia, Belarus, Kazakhstan). The study reveals the relationship between the strategic development of a motor transport enterprise and its innovative activity, where the latter is the tool for such development. An assessment of the development of the transport industry and its motor transport sector in Ukraine, Russia, Belarus and Kazakhstan indicates that there is a crisis both in the industry and in the sector, and that there is a need to improve the competitiveness of transport enterprises, especially given the growing influence of motor transport on national economies under research. It is proved that the effective functioning of road transport enterprises in domestic and foreign service markets is possible only by ensuring their own strategic development, which is based on increasing innovation activity, which requires the use of appropriate incentives. Significant prob-lems of stimulating innovative activity at Ukrainian, Russian, Belarusian, and Kazakhstan motor transport enterprises have been revealed, and ways of solving the identified problems have been de-veloped, taking into account the use of mathematical tools for evaluating the developed improvements.