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California MUTCD 2014 Edition Page 1139 <br />(EHWA's MUTCD 2009 Edition, including Revisions 1 & 2, as amended for use in California) <br />Table 6H-3. Recommended Advance Warning Sign Mimiimit+milSpacing <br />Road Type <br />Distance Between Signs*' <br />A B <br />C <br />Urban #swopeed}- 25 mph or less"' <br />100 feet <br />100 feet <br />100 feet <br />Urban - more than 25 mph to 40 mph"' <br />250 feet <br />250 feet <br />250 feet <br />Urban4pigk"epeed}- 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 />1,500 feet <br />2,640 feet <br />" The column headings A, B, and C are the dimensions shown in Figures 6H-1 through 6H-46. 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 "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 />