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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 Minimum Spacing <br />Road Type <br />A <br />Distance Between Signs" <br />B <br />C <br />Urbanylevpopeedj- 25 mph or less"' <br />100 feet <br />100 feet <br />loo feet <br />urban. more than 25 mph to 40 mph"' <br />250 feet <br />250 feet <br />250 feet <br />Urban4k*k*peed►-more than 40 mph'' <br />350 feet <br />350 reel <br />350 feet <br />Rural <br />500 feel <br />500feet <br />500 feet <br />Expressway I Freeway <br />1,000 feet <br />1.500 feel <br />2,640 feet <br />" The column headings A, B, and C are the dimensions shown in Figures 6H-1 Ovough 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 '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 TTC zone.) <br />Posted speed limit, off-peak 851h -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 (S) <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 = taper length in feat <br />W = width of offset In feet <br />S = posted speed limit, or off-peak 65th -percentile <br />'D speed prior to work starting, or the anticipated <br />operaling speed in mph <br />Chapter 6H —Typical Applications November 7, 2014 <br />Part 6 — Temporary Traffic Control <br />