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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 61-1-3: Recommended Advance Warning Sign MilOmtwrSpacing <br />Road Type <br />Distance Between Signs*" <br />A B <br />c. <br />Urban#emapasd}- 25 mph of less"' <br />100 feet 100 feet <br />100 feel <br />Urban - more than 25 mph to 40 mph"' <br />250 feet 250 feet <br />250 feet <br />Urbanmore than 40 mph'" <br />350 feet 350 feel <br />350 feet <br />Rural <br />500 feel 500 feet <br />500 feel <br />Expressway 7 Freeway <br />1,000 feet 1,500 feet <br />2,690 feet <br />The column headings A, B, and C are the dimensions shown in Figures 6H-1 through 6H-46. The A <br />distension 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'Yrsl sign"Is the sign in a three -sign series that is closest to the TTG <br />zone. The "third sign" is the sign that Is furthest upstream from the TTG zone.) <br />Posted speed limit, off-peak 85th -percentile speed prior to work starting, or 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 -1 <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 = poste peed limit, or off-peak 85th -percentile <br />speed rior to work starting, or the anticipated <br />operating speed in mph <br />0 <br />Chapter 6H - Typical Applications November 7, 2014 <br />Part 6 - Temporary Traffic Control <br />