_turnover.html.erb

  <script type="text/javascript" charset="utf-8">
    var turnover_gauge = <%= query_data['turnover-gauges'].first.to_json -%>;
    var data = turnover_gauge.data_warehouse.MIN_TURNOVER;
    $('#minimum-turnover').gauge({
      max: 20,
      colors: [
        '#fee',
        '#fcc',
        '#faa',
        '#f88',
        '#f66',
        '#f44',
        '#f33',
        '#f22',
        '#f11',
        '#f00',
      ]
    }).addSeries('Minimum Turnover (Vehicles/Day)', data);