Abstract: BML model is a kind of cellular automata model used to simulate and analyze the traffic system in the road network structure. hhe simulation and evolutionary optimization of the model implemented by software arc optimized slowly and very low efficiently, so that it limits the ability enormously of traffic flow model to be used in some high real time and high-speed occasion. In view of this question, we presented the architecture of an EHW-based cellular automata model,a cellular automata model implemented in evolvable hardware platform and intended for the on-line evolution of the traffic flow model. And then it can adjust the rule of the traffic light signal according to the real-time state of traffic flow. After a careful analysis of the comparison result, the self-adaptive optimization for traffic flow model based on evolvablc hardware was proved to be very useful and can meet the needs in the research and design of intelligent traffic system.

Key words: Cellular automata,BML，Evolvablc hardware, Software and hardware co-evolution, Intelligent traffic system