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California MUTCD 2012 Edition Page 1136 <br /> (FHWA's MUTCD 2009 Edition,as amended for use in California) <br /> •Tablp.6¢-1-4. '&rnulas etri' 06f6Nietii't�-.j aper bti 'eC+ <br /> Speed(s) _ Vppi Length(L)In feet <br /> i <br /> an.inph or less L=.W5 <br /> . 6tT <br /> -45inphormor6 L= <br /> 'Where;L =[apePlepgt41Afeet <br /> W=Svfdih of offset M reel <br /> S �ds4sd sNegd rmif 4r off peak 85th percentile <br /> spaeprro�to viprR starling,ai the anticipated <br /> oper4lafg`speed id mpti <br /> Table 61+4(CA).Taper Length Criteria for Temporary Traffic Control Zones <br /> (for 12 feet Offset Width) <br /> Minimum Taper Length** <br /> Speed* for Width of Offset 12 feet(W) <br /> S Merging Shifting Shoulder Down <br /> (mph) L Ll2 L/3 Stream <br /> feet 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 8250 <br /> 40 320160 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 /> -Posted speed limit,off-peak 86th-percentile speed prior to work 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=WS2160 <br /> For speeds of 45 mph or more,L=WS <br /> Where: L=taper length in feet <br /> W=width of offset in feet <br /> S=posted speed limit,off-peak 85th-percentile speed prior to work <br /> starting,or the anticipated operating speed in mph <br /> ***-Maximum downstream taper length is 100 feet.See Section 6C.08. <br /> Chapter 6H—Typical Applications January 13,2012 <br /> Part 6—Temporary Traffic Control <br /> Temporary Traffic Control(Parts 1 &6)Page 194 of 320 <br />