Abstract: Intelligent transportation system in the wireless signal fed back through a large number of vehicle status information, can be informed of the overall traffic from road conditions.This article applies the feedback signal bus intelligent control of traffic signals,defines the key indicators of public transportation information collection.Consider the signal uncertainty, combined with cloud theory building intelligent traffic signal control system of the former pieces of pieces of cloud after cloud generator and generator combination of indicators can be multi-dimensional signal into a bus on the road map information,and integrated the kinds of road information to determine the length of time the passage of traffic lights. By simulation experiments,the proposed traffic signal control method is feasible to simulate the human brain thinking for integrated decision-making,the control system more intelligent.