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California MUTCD 2014 Edition <br />(FHWA's MUTCD 2009 Edition, including Revisions I & 2, as amended for use in California) <br />Thble 6EI-fie Recommended Advance Warning Sign #Aieimm*Spacing <br />Road Type +I <br />Distance SetW,een Sigri <br />A 13 <br />C <br />Urban 4tewepitoo- 25 mph W losee" <br />1170 feet 100 feet <br />I 100 feet <br />Urban - more than 25 mph to 40 mph— <br />250 feet 250 feet <br />250 feel <br />Urban 4W#"paod}-more (!tan 40 mph — <br />350 feet 350 feel <br />350 feet <br />Rural <br />500 feet 500 feet <br />500 feet <br />Expressway/ Freeway <br />1,000 feel 1,500 feel <br />2,640 feel <br />" Tha column headings A, B. and C are the dimensions shown in Figures 61-1-1 through 6H46- The A <br />dimension is the distance from the transition or point of restriction to the first sign. The B dimension <br />is the distanra_ 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 closest to the TTC <br />zone- The "third sign" is the sign that is furthest opstrearn from the TTC 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) <br />Taper Length.(L) in feet <br />WS2 <br />40mphrorless <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 feel <br />S = poste speed limit, or oft -peak 85th -percentile <br />Spee prior to 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 />