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California MU T CD 2014 Edition <br />(FHWA's MUTCD 2009 Edition, including Revisions 1 & 2, as amended for use in California) <br />Table GH -3. Recommended Advance Warning Sign Miplmlww Spacing <br />Road Type <br />Distance Between Signs" <br />A B <br />c <br />Urban+swopeed}- 25 mph or less"' <br />100 feet 100 feel <br />100 feel <br />Urban - more than 25 mph to 40 mph"` <br />250 feet 250 feet <br />250 feet <br />Urban #hq4 cpaoAi,-more than 40 mph'** <br />350 feet 350 feet <br />950 feet <br />Rural <br />500 feel 500 feet <br />500 feet <br />Expressway / Freeway <br />1,000 feel 1,500 feel <br />2,640 feet <br />" The column headings A, B, and C are the dimensions shown In Figures 6H.1 through 61-1-46. 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'Yrst 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 6H-4: Formulas for Determining Taper Length <br />Speed (S) <br />Taper Length. (L) in feet <br />WSa <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 ofoffset In feet <br />S = postepeed limit, or off-peak 85th -percentile <br />spee41 for to work starting, or the anticipated <br />operaling speed in mph <br />Page 1136 <br />Chapter 6H–Typical Applications November 7, 2014 <br />Part 6 – Temporary Traffic Control - <br />