大数据在交通领域的应用有哪些？请举例说明。

import java.util.HashMap;
import java.util.Map;

public class IntelligentTrafficManagementSystem {

    private Map<String, Integer> trafficData;
    private Map<String, String> trafficStatus;

    public IntelligentTrafficManagementSystem() {
        trafficData = new HashMap<>();
        trafficStatus = new HashMap<>();
    }

    /**
     * 添加交通数据
     * @param trafficId 交通ID
     * @param congestionLevel 拥堵等级
     */
    public void addTrafficData(String trafficId, int congestionLevel) {
        trafficData.put(trafficId, congestionLevel);
        trafficStatus.put(trafficId, "Normal");
    }

    /**
     * 更新交通状态
     * @param trafficId 交通ID
     * @param status 交通状态
     */
    public void updateTrafficStatus(String trafficId, String status) {
        trafficStatus.put(trafficId, status);
    }

    /**
     * 获取交通状态
     * @param trafficId 交通ID
     * @return 交通状态
     */
    public String getTrafficStatus(String trafficId) {
        return trafficStatus.get(trafficId);
    }

    public static void main(String[] args) {
        IntelligentTrafficManagementSystem managementSystem = new IntelligentTrafficManagementSystem();
        managementSystem.addTrafficData("traffic1", 3);
        managementSystem.addTrafficData("traffic2", 2);
        managementSystem.updateTrafficStatus("traffic1", "Congested");
        String status1 = managementSystem.getTrafficStatus("traffic1");
        String status2 = managementSystem.getTrafficStatus("traffic2");
        System.out.println("Traffic1 status: " + status1);
        System.out.println("Traffic2 status: " + status2);
    }
}