The use of mobile and ubiquitous computing has been stimulated by the widespread diffusion of mobile devices, wireless networks and location systems. In this context, numerous applications are emerging in different areas such as education, entertainment, commerce and transport. This paper proposes the MD-UTS, a model for development of ubiquitous transport systems. The model allows management of different types of vehicles, making a historical record of their movement. The model provides information through web services that can be used by different applications. The article also describes two applications integrated into an urban transport simulator. The results demonstrate the feasibility of the model, facilitating the construction of applications directed to the transport system.