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California MUTCD 2012 Edition Page 1136 <br /> (FHWA's MUTCD 2009 Edition,as amended for use in California) <br /> Table 6E l-4. r5eorVrnulas.soi aecei'1.�ii�tirt i Th per Ui*t6 <br /> speed(s) Taper Length(! In feet <br /> • W5' <br /> A[I.r'ttprt or less L- •• ti0 <br /> •�5mph.ormore L= N(5' <br /> Whets;L =fapet ftllf iii feet <br /> W wadi(of ofrsgf fri flet <br /> s � .os ea SUEed rm�f,.or off-peak B51h•Percenlife <br /> F:.. <br /> see �6j,g go1,}Sstart ng,of 1pd anricipafed <br /> operdling speed id mph <br /> Table 6H-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 L12 L13 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 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 420280 50 <br /> -Posted speed limit,off-peak 85th-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=WS2/60 <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 851h-percentile speed prior to work <br /> starting,or the anticipated operating speed in mph <br /> ***-Maximum downstream taper length is 100 feet.See Section 60.08. <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 />