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The accepted curve is 8(miles squared)
or
8in.(distance in miles^2)
Which means to take the square root of the distance traveled in miles and then multiply that figure by eight inches.
So for example, if you traveled one mile, the formula would look something like this;
8(1×1) = 8 Inches of total curvature
And for the first ten miles traveled of curvature in inches…
8(1×1) = 8 Inches of total curvature
8(2×2) = 32 Inches of total curvature
8(3×3) = 72 Inches of total curvature
8(4×4) = 128 Inches of total curvature
8(5×5) = 200 Inches of total curvature
8(6×6) = 288 Inches of total curvature
8(7×7) = 392 Inches of total curvature
8(8×8) = 512 Inches of total curvature
8(9×9) = 648 Inches of total curvature
8(10×10) = 800 Inches of total curvature
Yet we can't measure any curvature AT ALL!! FROM ANY DISTANCE!!!