The number of people killed in automobile accidents in India is notably higher than the global average. The mortality toll from automobile accidents is especially high in the country's intermediate cities, much exceeding that of the country as a whole and even the country's largest cities. The creation of technical services within the context of so-called Intelligent Transportation Systems is one way that cities and mobility agencies have attempted to address these issues (ITS). Interoperability and integration of services are not possible, entail large costs, and are difficult to deploy because they are not based on an effective ITS design. Due to the lack of an established ITS architecture, it is not being used in the creation of these services. Although there are publications about regional ITS architectural design techniques, no such framework exists that takes into account both the city's specific setting and a wide variety of reference materials. We provide a technique to build an ITS architecture suitable for an intermediate city in a developing nation, with the goal of fostering the growth of mobility services in this sector. We established a straightforward, logical approach by reviewing the relevant paperwork, identifying the best practices, taking into account the scope and context, and so on. In this essay, we show the design process we developed and the outcomes we gained from using it. The developed methodology not only served to facilitate the design of an ITS architecture, but we also believe it may be used as a resource for the growth of ITS architectures in comparable settings. The city's mobility services can be planned and implemented effectively thanks to the ITS architecture that has been developed.