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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 GH -3. Recommended Advance Warning Sign 44inimumSpacing <br />Road Type <br />Distance Between Signs" <br />mph or less <br />A B <br />C <br />Urban+rmepeed}- 25 mph or less'" <br />100 feet <br />100 feet <br />100 feet <br />Urban - more than 25 mph to 40 mph— <br />250 feet <br />250 feet <br />250 feel <br />Urban4ltlqb"ewl}-more than 40 mph"' <br />350 feet <br />350 feet <br />350 reel <br />Rural <br />500 feet <br />500 feet <br />500 feel <br />Expressway r Freeway <br />1,000 feet <br />1,500 feet <br />2,840 feet <br />" The column headings A, B, and C are the dimensions shown in Figures 61-1-1 through OH46. 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 TTG <br />zone. The 'third sign" is the sign that Is furthest upstream from Ilia TTC zone.) <br />"" Posted speed limit, off-peak 65th -percentile speed prior to work sterting, or other anticipated operating speed <br />In mph. <br />Table 61-1-4. Formulas for Determinig Taper Length <br />Speed (S) Taper Length (L) In feet <br />W40 <br />mph or less <br />L = <br />60 <br />45 mph or more <br />L= WS <br />Where: L =taper length in (bet <br />W =width of offset in feet <br />S = posted speed limit, or off-peak 85th -percentile <br />r1 speed prior to work starling, or the anticipated 1 <br />operating speed in mph <br />Chapter 6H –Typical Applications November 7, 2014 <br />Part 6 – Temporaly Traffic Control <br />