This document is part of a series and defines general rules including role and function models for guiding and to introduce, build and evaluate smart operation and maintenance in various types of urban mobility and transportation. This document mainly describes some basic requirements of smart operation and maintenance of urban transportation system for sustainable development. Mainly includes: a) Terms and definitions b) Basic function settings c) Basic support conditions d) Roles and function models The basic requirements specified in this document are applicable to sustainable cities that urgently need to improve the operation and maintenance efficiency of transportation systems, especially super-large cities and cities with limited compact land resources and high requirements for efficiency