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California MUTCD 2014 Edition Page 1139 <br />(Ii IV M 2009 Ect including Revisions 1& 2, as amendedforuse in California) <br />Table 6H-3. Recommended Advance Warning Sign Miwiwid ii Spacing <br />Road Type <br />Taper Length (L) infest <br />Distance Between Signs"' <br />WS' <br />A B <br />C <br />Widen #swepeei}-25 mph or less"" <br />100 feet <br />100 teat <br />100fest <br />Urban - more than 25 mph to 40 mph— <br />250 feet <br />250 feet <br />250 feet <br />Urban(AyPWwllf- more than 40 mph— <br />350 fast <br />350fsen <br />MOli,st <br />Rural <br />Son ai <br />5nn kel <br />5n0 Mel <br />Expressway I Freeway <br />1,000 feet <br />1,500 feet <br />2,640 feet <br />The column headings A, B, and C are the dimensions shown in Figures 61-1-1 through 6H46. 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 thirdsigns (The'Yrst signis the sign in a three -sign series that is closest to me -FTC <br />zone. The 'ttha d sign" is the sign that is furthest upstream from the TTC zone.) <br />"• Posted speed limit, off-peak 85th-percenfile speed prior to work starting, or other Maripated operating speed <br />in mph. <br />Table 6H-4. Formulas for Determining Taper Length <br />speed (S) <br />Taper Length (L) infest <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 =man of offset in feet <br />S = posted speed limit, or off-peak 85th-percerelle <br />speed prior to work starting, or anticipated <br />operating speed in mph <br />Chapter 6H –Typical Applications November 7, 2014 <br />Part 6 –Temporary Traffic Control <br />