curl --request GET \
  --url 'https://api.511.org/transit/VehicleMonitoring?api_key='

{
  "Siri": {
    "ServiceDelivery": {
      "VehicleMonitoringDelivery": {
        "VehicleActivity": [
          {
            "RecordedAtTime": "2026-03-25T12:01:00-07:00",
            "MonitoredVehicleJourney": {
              "VehicleRef": "8654",
              "LineRef": "49",
              "VehicleLocation": {
                "Longitude": -122.4191,
                "Latitude": 37.7651
              }
            }
          }
        ]
      }
    }
  }
}