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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 61-1-3. Recommended Advance Warning Sign Miniminmm Spacing <br />` The Column headings A, 8, and Care the dimensions shown in Pigores 611-1 through 61146. The A <br />dimension is the distance from the transition ar point of reshtcaon to the Orst 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. jhe Int sign" Is the sign in a three•s)gn series that is closest to the TTC <br />zone. The "thlyd sign" is the sign that is furthest upstream from the ITC zone.) <br />Posted speed limit, off-peak 85th -percentile speed prior to work starting, er other anticipated operating speed <br />in mph. <br />Table 6H4. Formulas for Determining Taper Length <br />Speed (S) <br />TaperLength(L)infeet <br />Distance Between Signs"" <br />ws� <br />A B <br />L= <br />tss"' <br />100 feet <br />10a feet <br />too teat <br />mph"' <br />250 feet <br />250 feet <br />250 feet <br />10 mph*— <br />350 feet <br />350 feel <br />350 feet <br />500 feet <br />500 feet <br />500 feet <br />1,000 feet <br />1,500 feet <br />2,640 feet <br />` The Column headings A, 8, and Care the dimensions shown in Pigores 611-1 through 61146. The A <br />dimension is the distance from the transition ar point of reshtcaon to the Orst 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. jhe Int sign" Is the sign in a three•s)gn series that is closest to the TTC <br />zone. The "thlyd sign" is the sign that is furthest upstream from the ITC zone.) <br />Posted speed limit, off-peak 85th -percentile speed prior to work starting, er other anticipated operating speed <br />in mph. <br />Table 6H4. Formulas for Determining Taper Length <br />Speed (S) <br />TaperLength(L)infeet <br />ws� <br />40 mph or less <br />L= <br />so <br />45 mph or more <br />L= WS <br />Where: L = taper lengthinfeet <br />W =width of offset in feet <br />S = posted Speed limit, or off-peak 85th -percentile _ <br />speed prior to work starting, or the anticipated <br />operating Speed in mph <br />Chapter 6H — Typical Applications November 7, 2014 <br />Part 6 — Temporary Traffic Control <br />