P1

digraph G {

    node [shape=box ,style=dashed,color=blue]

    subgraph cluster_sensors {
        label="传感器模块"
        sensors [label="摄像头\n雷达\n车载传感器"]
    }

    subgraph cluster_data_processing {
        label="数据处理模块"
        data_processing [label="数据预处理\n特征提取\n数据分析"]
    }

    subgraph cluster_communication {
        label="通信模块"
        communication [label="V2V通信\nV2I通信"]
    }

    subgraph cluster_decision_control {
        label="决策控制模块"
        decision_control [label="交通流量优化\n信号灯控制\n路径规划"]
    }

    subgraph cluster_user_interface {
        label="用户界面模块"
        user_interface [label="移动应用程序\n网页界面"]
    }

    external_data [label="外部数据源"]
    traffic_center [label="交通管理中心",shape=circle, style=filled, fillcolor=yellow]

    external_data -> communication