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California MUTCD 2014 Edition <br />(FHWA's MUTCD 2009 Edition, including Revisions 1 & 2, as amended for use in California) <br />TablaG 1-3a Recommended Advance Warning Sign Minimum Spacing <br />Road Type I <br />Distance Between Signs" <br />A B <br />Ws - <br />Urban faw epeed}- 25.no of IeW" <br />l00 feet 100 Feet <br />loo feet <br />Urban - more than 25 mph to 40 mph' <br />250 feet 250 feet <br />250 feet <br />Urban #wj"pssd}-more than 40 mph" <br />350 feel 350 feel <br />350 feet <br />Rural <br />500 feet 500 feet <br />500 feet <br />Expressway I Freeway <br />1,000 feel 1,500 feet <br />2,640 feet <br />" The column headings A, B. and Care the di nemions shown in Figures GH -1 through 61-146. The A <br />dimension is the distance from the transition or point of restriction to the first sign. The E 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 "first sign"is the sign in a three -sign series that is closgst to thel T C <br />zone. The "third sig'is tie sign that is Wiliest upstream from the TTC ane.) <br />Posted speed limit, off-peak 55th -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} <br />Taper Length.(L) in feet <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 =width of'offset in feet <br />5 = posts peed limit, or off-peak 85th -percentile <br />Spee '{mor 10 work starting, or the anticipated <br />operating speed in mph <br />Page 1136 <br />Chapter 6H— Typical Applications November 7, 2014 <br />Part 6 — Temporary Traffic Control <br />