Quote:
Originally Posted by jamesqf
It's not frontal area, but cross section, at the point where the area is greatest. Obviously, for anything except maybe a cabover semi, the area is greatest about where the driver sits, and much less at the front.
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That is the definition of frontal area: the largest area of the entire vehicle as you see it from the front. It includes the wheels, side mirrors, roof, any protrusions underneath - everything you can see from the front.