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California MUTCD 201 A Edition Page 1136 <br />(FHWA's MUTCD 2009 Edition, including Revisions 1& 2, as amended for use in California) <br />Table GH -3. Recorninended Advance Warning Sign MinimmminSpacing <br />Road Typo <br />Distance Between Signs" <br />40 inph or less <br />r A B <br />C <br />h or less"' <br />Urbanllowep77thanOmph", <br />100 feet <br />100 feet <br />100 feet <br />Urban - more to 40 mph"' <br />250 feet <br />250 feet <br />250 feet <br />Urban(Mi9psp <br />350 feet <br />350 feet <br />350 feet <br />Rural <br />500 feet <br />500 feet <br />500 feel <br />Expressway J F <br />1,000 feet <br />1.500 feet <br />2,670 feet <br />The wlumn headings A, B, and C are the dimensions shown in Figures OH -1 through(i 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'fifsl sign' Is the sign in a three -sign series that is closest to the TTC <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 />8 <br />40 inph or less <br />L= <br />60 <br />45 mph or more <br />L= WS <br />Whore: L = taper length in feet <br />W = width of offset in feet <br />S = posted speed limit, or off-peak 85th -percentile _ <br />speedpriorto 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 />