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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 6Fi-3. Recommended Advance Warning Sign MMWM*M Spacing <br />Road Type <br />A <br />Distance Between Signs' <br />B <br />C <br />Urban+kwepwel}-.25 fnph or less"' <br />100feet <br />100 feet <br />100 feet <br />Urban -more than 25 mph to 40 mph"' <br />'Be' <br />250 feel <br />250 Leet <br />Urban#iil �paai}-mare than 40 mph'^ <br />350 feet <br />350 feel <br />350 feet <br />Rural <br />E2 <br />500 feat <br />500 feet <br />500 feet <br />Expressway I Freeway <br />1,000 fief <br />1,500 feet <br />2,640 feet <br />The column headings A, B, and Care the dimensions shown in Figures 6H-1 through OHA6. 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 "fust sign" is the sign in a three -sign series that is closest to the TfC <br />zone. The 'third sign." is the sign that is furthest upstream From Ilia 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 61.1-4. Formulas for Determining Taper Length <br />Speed (8) <br />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 =taper length in feet <br />W =width of offset in feet <br />5 = 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 />