Real-time guidance system of traffic flow is information reconstruct in unit time. If events occut in short periodic time, these events will inflict the normal traffic guidance. In this paper, a new and simple solution scheme is proposed by analyzing status traffic situation. In this plan, systematic revision for read-time guidance in burst event is added to deduce reaction time. This scheme is imporved technology built on the current guidance system, therefore, this conclusion can be widly applied to traffic flow guidance system.