It is a global trend that public demands for environmental noise information from the Authority on where they live, where they work or places of interest. Predicted noise data presented in the form of noise maps, 3-Dimensional (3D) photo-realistic model and virtual reality have become more and more popular. However, such models usually present only the noise levels predicted for the worst-case scenario. In other words, changes in noise levels over time with varying traffic conditions are not shown. There is thus a demand for temporal, i.e. time-varying, noise data presentation. This paper presents the results of a demonstration project where time-dynamic noise levels can be visualised while a viewer navigates a 3D model. Also, a brief introduction of the key features of a web-based platform specifically designed for disseminating multi-project time-varying 3D models to engage stakeholders in informed discussions on major proposals and facilitating a better understanding of road projects and issues in Hong Kong through the use of 3D electronic visualisation tools is provided.