This International Railway Standard (IRS) reviews dynamic integration tests and trial operation work for high speed lines and is intended to serve as a guide for the practical implementation of the work involved. This IRS can also serve as a reference for dynamic integration tests and trial operation or similar work conducted on conventional lines. In order to make the position clearer and to offer a comprehensive guide, this IRS document also deals briefly with aspects preceding the dynamic integration tests. This IRS clearly reflects the present state of knowledge, considering currently applicable (international) practices and shall be reviewed periodically as required. In order to make the position clearer and to offer a comprehensive guide, this IRS document also deals briefly with aspects preceding the dynamic integration tests. This IRS clearly reflects the present state of knowledge, considering currently applicable (international) practices and shall be reviewed periodically as required.