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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 Minin""w Spacing <br />Road Type <br />Taper Length (L) in feet <br />Distance Between signs" <br />Wse <br />A B <br />C <br />Urban4tewepeeel} 25 mph or less"' <br />100 feet <br />100 feet <br />too feet <br />Urban - more than 25 mph to 40 mph*— <br />250 feet <br />250 feet <br />250 feet <br />Urban4Wgkopeso-more than 40 mph'— <br />350 feet <br />350 feel <br />350 feet <br />Rural <br />500 feet <br />500 feet <br />500 feet <br />Expressway / Freeway <br />1,000 feet <br />1,500 feet <br />2,040 feet <br />The column headings A, B, and Care the dimensions shown in Figures 5H-1 through 6H -4G. The A <br />dimension is the distance from the transition or point of restriction to the first sign. The 8 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 'Yrsl sign' is the sign in a three -sign series that is closest to the iTC <br />zone. The "third sign" is the sign that is furthest upstream from the TfC zone.) <br />Posted speed limit, of( -peak 85th -percentile speed prior to work starting, or other anticipated operating speed <br />in mph. <br />Table 6H-4. Formulas for DeterminingTaper Length <br />speed (S) <br />Taper Length (L) in feet <br />Wse <br />40 mph or less <br />L = <br />60 <br />45 mph or more <br />L= WS <br />Where,' L = taper teingth in feet <br />W =width of offset in feet <br />S = posted speed limit, or oft -peak 05th -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 />