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California MUTCD 2014 Edition <br />(FHWA's MUTeD 2009 Edition.including Revisions 1 &2,as amended for use in Califomia) <br />Table 6H-4(CA).Taper Length Cr~eria for Temporary Traffic Control Zones <br />(for 12 feet Offset Width) <br />Minimum Taper Length" <br />Speed'for Width of Offset 12 feet (\111) <br />S Merging Shifting Shoulder Down(mph)L U2 U3 Stream <br />(feet)(feel)(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 />,-Posted speed limit,off-peak 85lh_percentile speed prior to worl(starting,or the anticipated operating <br />speed in mph. <br />•,-For other offsets use the following merging taper length formula for L: <br />For speeds of 40 mph or less,L=WS2/60 <br />For speeds of 45 mph or more,L=WS <br />Where:L =taper length in feet <br />W =wfdth of offset iT!feet . <br />S =posled speed limit,off-peal(85lh-percentile speed prior to work <br />starting,or the anticipated operating speed in mph <br />---Maximum downstream taper length is 100 feet.See Section 6e.08. <br />Page 1137 <br />'-. <br />-. <br />Chapter 6H -Typical Applications <br />Part 6 -Temporary Traffic Conlrol <br />November 7,2014