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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 mi" Spacing <br />Road Type <br />11 A <br />Distance Between Signs" <br />B <br />c <br />- <br />L= <br />80 <br />45 mph or more <br />I L= WS <br />Urban(Wl�wif- more than 40 mph•^ <br />M <br />350 feet- __ . <br />350 feet <br />Rural <br />500 feet <br />500 feet <br />Expressway I Freeway <br />1,500 feet <br />2,640 feet <br />The column headings A, B, and C are the dimensions shown in Figures 61-10 through OH -40. 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 85th -percentile speed prior to work starling, 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 />WS2 <br />40 mph or less <br />L= <br />80 <br />45 mph or more <br />I L= WS <br />Where: L = taper length In feel <br />W = width of offset In feet <br />S = 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 />