This part of IEC 62290 provides an introduction to the standard and deals with the main concepts, the system definition, the principles and the basic functions of UGTMSs (Urban Guided Transport Management and Command/Control Systems) for use in urban guided passenger transport lines and networks. This part of IEC 62290 is applicable for new lines or for upgrading existing signalling and command control systems. This part of IEC 62290 is applicable to applications using: • continuous data transmission, • continuous supervision of train movements by train protection profile, • localisation of trains by external wayside equipment or reporting trains. This standard is not applicable to existing command and control systems or projects in progress prior to the effective date of this standard.