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California MUTCD 2014 Edition Page 1130 <br />(FHWA's MUTCD 2009 Edition, bicluding Revisions 1 & 2, as amended for use to California) <br />Table Ghl-3. Recorninended Advance Warning Sign Minimawp Spacing <br />Road Type <br />Distance Between Signs" <br />40 mph or less <br />A B <br />c <br />Urban4lawapse0- 25 mph or less"' <br />10o teet <br />loo feet <br />100 feet <br />Urban - more than 25 mph to 40 mph"' <br />250 feet <br />250 feet <br />250 feel <br />Urban4Wmbepsal}-more than 40 mph'- <br />350 feet <br />350 feel <br />350 feet <br />Rural <br />500 feel <br />500 feet <br />500 feet <br />Expressway I Freeway <br />1,000 feet <br />1,500 feet <br />2,640 feet <br />" The column headings A, 0, and Care the dimensions shown in Figures 6H.1 through 61-1-40. The A <br />dimension is the distance from the transition or point of reslriclion to the first sign, The S dimension <br />Is the distance between the first and second signs. The C dimension is the distance behveen the <br />second and third signs. (The 'first sign" Is the sign in a Ihree-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, of other anticipated operating speed <br />in mph. <br />Table 6H-4. Formulas for Determining Taper Length <br />Speed (S) 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 />S = posted speed limit, or off-peak 8501 -percentile <br />speed prior to work starling, or the anticipated -• - <br />operating speed in mph <br />Chapter 6H – Typical Appllcatlmvs November 7, 2014 <br />Part 6 –Temporary Traffic Control <br />