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The solver will utilize matrix mathematics to solve for C(rr), C(v), and C(d).
A flat surface will still be required, and of course the vehicle to be tested will have to be put into neutral prior to starting the test. However, if my calculations are correct, then only one pass will be needed in order to determine values for the above coefficients, and that pass will require 1.5 seconds to collect all of the data it would need to calculate the above coefficients. It won't matter too much how fast (within reason) the vehicle will be travelling, either, as long as the road being used is reasonably flat and smooth and level. I think that a mid-range speed (around 30 MPH) should give the most accurate results.
It's not to say that only one pass will be needed. Several passes should be performed in order to get a good average for the three coefficients above.
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