{
  "fields": [{"id":"_id","type":"int"},{"id":"Speed","type":"text"},{"id":"1973a","type":"text"},{"id":"1984b","type":"text"},{"id":"1997c","type":"text"},{"id":"2012d","type":"text"}],
  "records": [
    [1,"(miles per hour)","(13 vehicles)","(15 vehicles)","(9 vehicles)","(74 vehicles)"],
    [2,"15.0","e","21.1","24.4","e"],
    [3,"20.0","e","25.5","27.9","e"],
    [4,"25.0","e","30.0","30.5","e"],
    [5,"30.0","21.1","31.8","31.7","e"],
    [6,"35.0","21.1","33.6","31.2","e"],
    [7,"40.0","21.1","33.6","31.0","33.2"],
    [8,"45.0","20.3","33.5","31.6","e"],
    [9,"50.0","19.5","31.9","32.4","31.9"],
    [10,"55.0","18.5","30.3","32.4","e"],
    [11,"60.0","17.5","27.6","31.4","27.9"],
    [12,"65.0","16.2","24.9","29.2","e"],
    [13,"70.0","14.9","22.5","26.8","24.1"],
    [14,"75.0","e","20.0","24.8","e"],
    [15,"80.0","e","e","e","20.5"],
    [16,"Fuel economy loss","","","",""],
    [17,"50–60 mph","0.103","0.135","0.031","0.125"],
    [18,"60–70 mph","0.149","0.185","0.146","0.136"],
    [19,"50–70 mph","0.236","0.295","0.173","0.245"],
    [20,"","","","",""],
    [21,"Sources:","","","",""],
    [22,"1973- U.S. Department of Transportation, Federal Highway Administration, Office of Highway \n     Planning, The Effect of Speed on Automobile Gasoline Consumption Rates, Washington, \n     DC, October 1973. ","","","",""],
    [23,"","","","",""],
    [24,"","","","",""],
    [25,"1984 - U.S. Department of Transportation, Federal Highway Administration, Fuel  \n     Consumption and Emission Values for Traffic Models, Washington, DC, May 1985.","","","",""],
    [26,"","","","",""],
    [27,"1997 - West, B.H., R.N. McGill, J.W. Hodgson, S.S. Sluder, and D.E. Smith, Development and \n     Verification of Light-Duty Modal Emissions and Fuel Consumption Values for Traffic \n     Models, FHWA-RD-99-068, U.S. Department of Transportation, Federal Highway \n     Administration, Washington, DC, March 1999. ","","","",""],
    [28,"","","","",""],
    [29,"","","","",""],
    [30,"","","","",""],
    [31,"2012 - U.S. Department of Energy and U.S. Environmental Protection Agency, Fuel Economy \n     Guide website:  www.fueleconomy.gov.  The Green Car Congress, \"ORNL researchers \n     quantify the effect of increasing highway speed on fuel economy.\" February 8, 2013.","","","",""],
    [32,"","","","",""],
    [33,"","","","",""],
    [34,"","","","",""],
    [35,"","","","",""],
    [36,"       a Model years 1970 and earlier cars.","","","",""],
    [37,"       b Model years 1981–84 cars and light trucks.","","","",""],
    [38,"       c Model years 1988–97 cars and light trucks as shown in Table 4.30.","","","",""],
    [39,"       d Model years 2003-2012 cars and light trucks.","","","",""],
    [40,"       e Data are not available.","","","",""]
]}