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• <br />California MUTCD 2014 Edition(FHWA's MUTCD 2009 Edition,including.Revisions 1 &2,as ameuded for use ill Califomia) <br />Table 61-1-4(CA).Taper Length Criteria for Temporary Traffic Control Zones <br />(for 12 feet Offset Width) <br />Page 1137 <br />'-, <br />Minimum Ta\OerLength~ <br />Speed'for Width of Offset 12 feet (\1\1) <br />S Merging Shifting Shoulder Down.(mph)l U2 U:3 Stream <br />Ifeet)(feet)(feet)(feet\""" <br />20 80 40 27 50 <br />25 125 63 42 50 <br />30 ,180 90 '60 50 <br />35 245 123 82 50 <br />'40.320 160 107 50 <br />45 540 270 180 50 <br />.50 600 300 200 .50 <br />55 660 330 220 50 <br />60 720 360 240 50 <br />65 780 390 260 50 <br />70 840 420 280 50 <br />.75 900 450 300 50 <br />~'.:.. <br />•-Posted speed limit,off-peak 85lh..percentilespeed prior to work starting.or the anticipated operating <br />speed in mph.. <br />.,-For other offsets use the following merging taper length Formulafor L: <br />For speeds of 40 mph or less.L=WS2/60 <br />For speeds of 45 mph or more,L=WS <br />---... <br />.,Where:L =taper length In feet <br />W =width of offset i~feet . <br />S =posted speed limit.off-peak 85~-percentile speed prior to work <br />starting.orthe anticipated operating speed in mph . <br />••••Maximum downstream taper length is 100 feet.See Section 6C.08. <br />Chapter 6H -Typical Applications <br />Part 6 -Temporary Traffic Conlrol <br />November 7,2014