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California MUTCD 2014 Edition Page 1136 <br />(FHWA's MUTCD 2009 Edition, including Revisions 1 & 2, as amended for use in California) <br />Table 6Ff-3. Recommended Advance Warning Sigii iVh fiwmt%PeSpacing <br />The column headings A, 0, and C are the dimensions shown in Figures 6H-1 through 6H-46. The A - <br />dimension is the distance from the transition or point of restriction to Iho first sign. The 8 dimension <br />is the distance between the first and second signs. The C dimension is the distance between the <br />second and third signs. (The'first sign" Is the sign in a three -sign series that is closest to the TTG <br />zone. The'third sign" is the sign that is furthest upstream from the TTC zone.) <br />Posted speed limit, off-peak 85th -percentile speed prior to work starting, or other anticipated operating speed <br />in mph. <br />Table 61-1-4. Formulas for Determining Taper Length <br />Speed (S) <br />Taper Length (L) In feet <br />WS2 <br />40 mph or less <br />L` 80 <br />45 mph or more <br />L= WS <br />Where: L = taper length in feet <br />W = width of offset in feet <br />S = posted speed limit, or off-peak 85th-percenille <br />speed prior to work starting, or the anticipated <br />operating speed in mph <br />Chapter 6H —Typical Applications <br />Part 6 — Temporary Traffic Control <br />November 7. 2014 <br />