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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 Mtrimum Spacing <br />Road Type <br />Taper Length. (L) in feet <br />Distance Between Signs•" <br />W82 <br />A 13 <br />c <br />Urban+awwepvwI*- 25 mph or less"' <br />100 feet <br />100 feel <br />100 feel <br />Urban - more than 25 mph to 40 mph"` <br />250 feet <br />250 feel <br />250 feet <br />Urban 4Mylwpe9*-more than 40 mph'- <br />350 feel <br />350 feet <br />350 feet <br />Rural <br />500 feet <br />500 feet <br />500 feet <br />Expressway / Freeway <br />1,000 feel <br />1,500 feet <br />2,640 feet <br />" The column headings A, B. and C are the dimensions shown in Figures 61-11 through 6H-46. The A <br />dimension is the distance from the transition or point of restriction to the Ilrslsign. 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 [hal is closest to the TTG <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 anlicipaled operating speed <br />in mph. <br />Table 61-1-4; Formulas for Determining Taper Length <br />Speed (S) <br />Taper Length. (L) in feet <br />W82 <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 of offset in feet <br />S = postepeed limit, or off-peak 85th-percenille <br />spee rior 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 />