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California MUT CD 2014 Edition Page 1136 <br />(PHWA's MUTCD 2009 Edition, including Revisions 1 & 2, as amended for use in California) <br />Table GH -3. Recommended Advance Warning Sign Mieimtim Spacing <br />Road Type <br />Distance Between Signs"' <br />P. B <br />C <br />Urban #@w*peed}- 25 mph or less " <br />100 feel 100 feel <br />100 feet <br />Urban - more than 25 mph to 40 mph— <br />250 feet 250 feet <br />250 feet <br />Urban more than 40 mph"* <br />350 feel 350 feet <br />350 feet <br />Rural <br />500 feel 500 feet <br />500 feet <br />Expressway / Freeway <br />'1,000 feet 1,500 feet <br />2,640 feet <br />The column headings A, 0, and C are the dimensions shown in Figures GH -1 through 6H-46. The A <br />dimension is the distance from the transition or point of restriction to the 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 TTC <br />zone. The "third sign" is the sign that is furthest upstream from the TTG zone.) <br />Posted speed limit, off-peak 85th -percentile speed prior to work starting, or other anticipated operating speed <br />in mph. <br />Table GH -4. Formulas for Determining Taper Length , <br />Speed (8) <br />Taper Length.(L) in feet <br />WSz <br />40mph -or less <br />L= <br />fi0 <br />45 mph or more <br />L= WS <br />Where: L = taper length in feet <br />W =width Of offset in feet <br />5 = postepeed limit, or off-peak 85th -percentile <br />spee91!or 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 />