Resumen
Upon outspending of the service term by metro tunnel escalators, it is important to determine the degree of escalators wear and the term of remaining life. To ensure safety of metro tunnel escalators in such cities as Moscow and St. Petersburg it is required to assess the technical condition of escalators outspent their standard service term for potential extension of their service term until they are replaced. The article considers the methods for such assessment, the experience of its application and new methods for monitoring of the technical condition of operated escalators.