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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 SH -3. Recommended Advance Warning Sign Minit"eim Spacing <br />Road Type <br />Distance Between 6 <br />A <br />B _ <br />Urban4lwt•epeed}- 25 mph or less"' <br />10o feel <br />100 feel <br />Urban - more than 25 mph to 40 mph"' <br />250 feet <br />250 feet <br />Urbanmore than 40 mph'- <br />350 feet <br />350 feet <br />Rural <br />500 feet <br />500 feet <br />Expressway r Freeway <br />1,000 feet <br />1.500 feet <br />" The column headings A, B. and G are the dimensions shown in Figures 61-1-1 through Ohl -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 "first sign' Is ('ne sign in a three -sign series that is closest to the TTC <br />zone. The 'third slgri" is the sign that is furthest upstream from the TTG zone.) <br />'•• Posted speed limit, off-peak 851h -percentile speed prior to work starting, or other anticipated operating speed <br />in mph. <br />Table 6H -4o Formulas, for Determining Taper Length <br />Speed (S) Taper Length (L)infeet <br />WSz <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 85th -percentile <br />`7--, speed prior to work starting, or the anticipaicd <br />operating speed In mph <br />Chapter 6H —Typical Applications November 7, 2014 <br />Part 6 — Temporary Traffic Control <br />