Activity report by driver using API

I'm trying to use the API to get actual miles driven (obd not gps) by each driver for a period of time. So far, it looks like we have to use a combination of:

/fleet/vehicles/stats/history
then correlate it with
/fleet/driver-vehicle-assignments
to find the same mileage we see when we run the Activity report and look at it by driver. That's a lot of data manipulation.

Is there an easier way to get this?