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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 Mlnimtm Spacing <br />Road Type <br />Distance Between Signs' <br />A 6 <br />I C <br />Urban+vm*pesd}- 25 mph or less•'" <br />100 feel 100 feet <br />100 feet <br />Urban - more than 25 mph to 40 mph*'* <br />250 feel <br />250 feet <br />Urban(Milllrrp�arif-more than 40 mph"' <br />et 350 feet <br />350 feet <br />Rural <br />r250eet <br />et 500 feet <br />500 feet <br />Expressway l Freeway <br />eet 1,500 feel <br />2,540 feet <br />The column headings A, B, and C are the dtmenstons sbown in Figures 6H-1 through 61-146. 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'Yirst sign" Is the sign in a three -sign series that is closest to the TTC <br />zone. The "third sign" is Me sign that Is furthest upstream from the TTC zone.) <br />Posted speed limit, off-peak 85th-percenttte 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) <br />Taper Length. (L)infoot <br />WSz <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 = postespeed limit, or off-peak 85th -percentile <br />speed1irior to work starting, or the anticipated <br />operating speed in mph <br />�a <br />Chapter GH — Typical Applications November 7, 2014 <br />Put 6 — Temporary Traffic Control - <br />