The speed range of the vehicle. If the vehicle is powered by an engine, the upper limit of the speed range (indicated by [maxValue](http://schema.org/maxValue) should be the maximum speed achievable under regular conditions. Typical unit code(s): KMH for km/h, HM for mile per hour (0.447 04 m/s), KNT for knot \*Note 1: Use [minValue](http://schema.org/minValue) and [maxValue](http://schema.org/maxValue) to indicate the range. Typically, the minimal value is zero.\* Note 2: There are many different ways of measuring the speed range. You can link to information about how the given value has been determined using the [valueReference](http://schema.org/valueReference) property.