Purpose: To explore the issues of practical participation and interaction of operator companies with Russian Railways Ltd in the matters of operational processes digitalization and improvement. To analyze the composition of possible indicator of transport service comprehensive level quality. To assess the impact of operator company on constituent elements of car turnover duration given digitalization processes. Methods: The analysis of indicators composition to assess operational performance and transport services provided level. Formula derivation for transport service comprehensive level quality. Results: Ways to develop interaction between businesses and Russian Railways Ltd, to raise the level of technological processes digitalization, to assess transport services quality level are presented. Practical significance: Wagon turnover time cut, the reduction of commercial inspection operations duration and transport services level rise will allow to reduce time costs, to increase transportations profitability and to raise the company's competitiveness.