This paper highlights a couple of examples where GPS has been used not just for vehicle location but where its functionality has been extended further to provide the users with more accurate details about vehicle movements. These examples highlight the fact that GPS is only one component of a total system that is needed for users to get an understanding of efficient vehicle movement. The first example shows how Macmahons mining contractors have utilised GPS to track their dump trucks to get an overall picture of mine efficiency. This project has been developed in conjunction with the Transport Systems Centre (TSC) of the University of South Australia and has now matured to such an extent that its scope is broadening with the advent of more accurate and reliable GPS techniques. These techniques include the application of differential GPS that enable the real time accuracies of GPS to increase to within five metres. To achieve these increased accuracies there are a number of techniques that can be implemented. The advantages and disadvantages of these techniques are discussed together with an assessment of how the most appropriate technique will be implemented in the mining application. The paper also highlights the use of differential GPS in public transportation applications such as demand responsive public transport. The application highlights the real time integration between GPS and a geographical information system (GIS), together with computer aided dispatch (CAD) software to form part of a real time system. (a) For the covering entry of this conference, please see IRRD abstract no. 899454.