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California MUTCD 2014 Edition Mage 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 MMirnt m Spacing <br />Road Type <br />Taper Length (L) in feet <br />Distance Between Signs" <br />WS1 <br />A B <br />C <br />Urban 25 25 mph or less"' <br />100 feet <br />100 Net <br />100 feet <br />Urban - more than 25 mph to 40 mph*** <br />250 feet <br />250 reel <br />250 feet <br />Urban{Mi9Wopae4. more than 40 mph"' <br />350 feet <br />350 feet <br />350 feet <br />Rural <br />500 feet <br />500 feet <br />500 feet <br />Expressway/Freeway <br />1,000 feet <br />1,500feet <br />2,640 feet <br />" The column heatlings A, 0, and C are the dimensions shown in Figures 611-1 through 6FI-46_ The A <br />dimension is the distance from the transition or point of restriction to the first sign. The 8 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 "fist sign" is this 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 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 />Where: L =taper length in feet <br />W =width of offset in feel <br />5 = posted speed limit, or oft -peak 85th-percentile <br />speed prior to 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 />Taper Length (L) in feet <br />WS1 <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 feel <br />5 = posted speed limit, or oft -peak 85th-percentile <br />speed prior to 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 />