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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 6H-3. Recommended Advance Warning Sign Minkwewr Spacing <br />Road Type <br />Distance Between Signs" <br />A e <br />C <br />Urban{lewvpewl}- 25 mph or fess'"' <br />too feel 100 feel <br />100 feel <br />Urban - more than 25 mph to 40 mph*" <br />250 feet 250 feet <br />25D feet <br />Urbanmore than 40 mph— <br />350 feel 350 feet <br />350 feet <br />Rural <br />500 reel 500 feet <br />500 feet <br />Expressway I Freeway <br />1,000 feel 1,500 feet <br />2,640 feet <br />The column headings A. B, and Care the dimensions shown in Figures 61-1-1 through 6H46. The A <br />dimension is the distance from the transition or point of restriction to the Orstsign. 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 "first sign' Is the sign in a three-slgn 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 65th -percentile speed prior to work starting, or other anticipated operating speed <br />in mph. <br />Table 6H-4: Formulas for Determining Taper Length <br />Speed(8) <br />Taper Length.(L) in feet <br />W82 <br />40 mph or less <br />L= <br />60 <br />45 mph or more <br />L= WS <br />Where: L = laper length in feet <br />W =width of offset In feet <br />S = posted speed limit, or off-peak 85th -percentile <br />speedprior 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 />