The simulation allows learners to close freeway lanes and divert traffic to an arterial road. Users can see the effect of the detour on freeway and arterial delay. Users can then adjust signal timing interactively on a time space diagram and watch the effect of their adjustment on green band changes and on arterial delays and total delays. However, because of the volume of information, which is presented textually, users often work hard to locate the most valuable items. However, it is usually difficult for users to find or create the coordinated set of visualizations they need.
Users query their relational database and load results into desired visualizations.
Then they specify coordinations between visualizations for selecting, navigating, or re-querying. Developers can make independent visualization tools snap-able by including a few simple hooks. In today's homes and schools, children are emerging as frequent and experienced users of technology. As this trend continues, it becomes increasingly important to ask if we are fulfilling the technology needs of our children. To answer this question, we have developed a research approach that enables young children to have a voice throughout the technology development process.