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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 GH -3. Recommended Advance Warning Sign Mini) Spacing <br />Road Type <br />A <br />Distance Between Signs' <br />B <br />C <br />UrbandbwMasd}- 25 mph or less'" <br />100 feel <br />100 feet <br />100 feet <br />Urban - more than 25 mph to 40 mph"O <br />250 feet <br />250 feel <br />250 feet <br />Urban+At9prpw0}-more than 40 mph'** <br />350 feet <br />350 feel <br />350 feet <br />Rural <br />500 feel <br />500 feet <br />500 feet <br />Expressway / Freeway <br />1,000 feet <br />1,500 feet <br />2,640 feet <br />• iP_ o9r+r._,._._,,.._:,._.,,.fix—„v"�"r'... <br />” The column headings A, B, and C are the dimensions shown in Figures 61-1-1 through 6H-46. The A <br />dimension is the distance from the transition or point of restriction to the first sign. The B 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'Yirsl 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 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 BH -4:, Formulas for Determining Taper Length <br />Speed (S) Taper Length (L) in feet <br />WS - <br />40 mph or less <br />L = <br />60 <br />45 mph or more <br />L= WS <br />Where: L = leper length in feet <br />W =width of offset In feet <br />S = postepeed limit, or off-peak 85th -percentile <br />speed `dur to work starting, or the anticipated <br />operating speed in mph <br />Chapter 611 - Typical Applications November 7, 2014 <br />Part 6 - Temporary Traffic Control <br />