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California MUTCD 2014 Edition Page 1136 <br />(PHWA's MUTCD 2009 Edition, including Revisions 1 & 2, as amended for use in California) <br />Table 61-4-3: Recommended Advance Warning Sign MrintmrSpacing <br />Road Type <br />Taper Length.(L) in feet <br />Distance Between Signs" <br />WS, <br />A B <br />c <br />Urbandlev'apesd}- 25 mph or less"' <br />100 feet <br />100 feet <br />log rest <br />Urban - more than 25 mph to 40 mph*'* <br />250 feet <br />250 feet <br />250 feet <br />Urban more than 40 mph'" <br />350 feel <br />350 feel <br />350 feet <br />Rural <br />500 feel <br />500 feet <br />500 feel <br />Expressway r 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 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 "first sign" Is the sign in a Iltree-slgn series that is closest to the TTG <br />zone. The "third sign' is the sign that is furthest upstream from the TTC zone.) <br />Posted speed limit, off-peak 65th -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 mphor less <br />=----- <br />L=- <br />60 <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 />S = postespeed limit, or off-peak 85th -percentile <br />speer "flor to work starting, or the anticipated <br />operating speed in mph <br />Chapter 6H – Typical Applications November 7, 2014 <br />Pato 6 – Temporary Traffic Control - <br />