In order to alleviate traffic congestion at roundabouts caused by traffic flow differences on the entrance road and improve the traffic operation efficiency of roundabouts,this paper proposes a fuzzy controller suitable for roundabouts using fuzzy control method.The maximum queue length of vehicles in the current phase and the next phase is used as the input variable,and the green light extension time in the current phase is used as the output variable.By changing the signal timing scheme,the average delay of roundabout vehicles is reduced,and the model was constructed using the fuzzy logic toolbox of MATLAB.To verify the effectiveness of the model,an example simulation was conducted using Jingyang Square in Changchun city.VISSIM software was used to build a roundabout model,and simulations were conducted before and after optimization while ensuring that external conditions remained unchanged.The results show that the average queue length of vehicles around the island has been reduced by 5％,and the average vehicle delay has been reduced by 6％.The research results provide new ideas for signal timing at roundabouts.
维普
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