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California MUTCD 2014 Edition Page 1130 <br />(FHWA's MUTCD 2089 Edition, including Revisions 1 & 2, as amended for use in California) <br />Table 61-1-3. Recommended Advance Warning Sign M4inirmilim Spacing <br />Road Type <br />A <br />Distance Between Signs" <br />7 B <br />C <br />Urbsn+r*epeed►- 25 mph or le8a"• <br />loofeet <br />100 feet <br />100 at <br />Urban - more than 25 mph to 40 mph"' <br />250 feet <br />250 feel <br />250 Met <br />Urban(Mi9{►epo"f-more man 40 mph'" <br />350 feel <br />350 Mel <br />350 feet <br />Rural <br />500 feel <br />500 feet <br />500 feet <br />Expressway l Freeway <br />1,000 feet <br />L500feet <br />2,640 Met <br />" The column headings A, B, and C are the dimensions shown in Figures OH -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 three -sign series that is closest to the TTC <br />zone. The'thlyd sign' is the sign that Is furthest upstream from Bre TTC zone.) <br />"'• Posted speed limit, off-peak 85th-peroanlite speed prior to work sterling, or other anticipated operaling speed <br />in mph. <br />Table 61-1-4. Formulas for Determining Taper Length r.4 <br />Speed (S) <br />Taper Length (L) in feet <br />wS2 <br />40 inph or lessL <br />= <br />60 <br />45 mph or more <br />L= WS <br />Where: L-laperiengihinfeet <br />W =width of offset In feet <br />5 = posted speed limit, or off-peak 85th -percentile _ <br />77 <br />speed prior to work starting, or the anticipated i1 <br />operating speed In mph <br />Chapter GH - Typical Applications November 7, 2014 <br />Pant 6 - Tennporaly Traffic Control <br />