Conditions for the effective organization of repair-track works using technology of lengthy closing track sections for a day and more, as well as the "windows" of long duration. Technology of long-term closure of sections is becoming more common. In 2016, more than 60 % of the total amount of repair and reconstruction of infrastructure is performed using such a method of organization of work. This minimizes the total execution time for repair and track work and accordingly optimized their impact on the operational activities of sections and directions. The concept of transit directions is established, repair track works on them must be performed only by in-transit technology. A list of such areas, including interconnected transit areas was made, in which work planning is carried out comprehensively. When solving the problem of building schedules of long closures and "windows" of long duration such new concepts as "transit period of one-off closure of section", "shift of section closure in transit", "common planning period of section closures in transit" were determined with number of others, using of which is gradually determined by the duration of works by the technology in transit, including interconnected transit directions. Conditions are established for allocating limiting transit directions which are advantageous for performing works by "in transit" technology. The principles of constructing variant train schedule on single-track lines was developed with the definition of sections and segments for which the execution of repair works is performed by in transit technology. Application of the proposed methodic provisions will streamline the system of using advanced methods of performing repair and track works.