Many groups use sensors to monitor complex processes and systems. For example, highway departments monitor road networks with cameras and vehicle counters embedded in the roadway. These sensors alert traffic centers of problems on the road and allow center managers to provide early interventions to minimize traffic flow interruptions. However, they have no way of knowing if their interventions are optimum for the circumstances. Having a system that could provide insight into the outcome of various decisions in a rapid manner would help them choose the best course of action. This paper proposes investigating how real time sensors could be coupled with a road network simulation to provide a real time decision support capability for traffic managers. It reports the results of a prototype system to test the usefulness of such a system.