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Mixed flow methodology, question

Eric Royer
California Dept. of Transportation
Mixed flow methodology, question was posted on November 19th, 2018 at 4:36 PM EST
regarding Chapter 26: Freeway and Highway Segments: Supplemental

how do I proceed...? In the mixed flow methodology, Step 6, Computing the Exponent for the Mixed Flow Model Speed Flow Curve, if the FFSmix result is between Scalib90 and Scalib100, equation 26-20 becomes an error, as you can't take the natural log of a negative number.

(Edited July 19th, 2020 at 1:31 PM EDT)

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