Support (1), module (101, 201) to be placed on the support, transport system for displacement of people/goods modernized with the module and modernization method of transport systems for displacement of people/goods. The support (1) has: fixings (11) to fix the support (1) to a bearing structure (10) of the transport system, horizontal tie plates (12) to support and horizontally place the module (101, 201), lateral tie plates (13) to support and laterally place the module (101, 201), longitudinal tie plates (14) to support and longitudinally place the module (101, 201). The module has positioning and verification equipment (101A, 201A, 301A) to place the module (101, 201, 301) maintaining within tolerances the system lines of the transport system. The transport system has: a support (1) and an entrance (101)/exit (201)/central (301) module on an entrance (100)/exit (200) finished floor/in a central section.