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Table 6H•4(CA). Taper Length Criteria for Temporary Traffic Control Zones <br />(for 12 feet Offset Width) <br />Speed* <br />S <br />(mph) <br />Minimum Taper Length* <br />for Width of Offset 12 feet (W) <br />Merging <br />L <br />feet <br />Shifting <br />L12 <br />feet <br />Shoulder <br />L13 <br />feet <br />Down <br />Stream <br />(feet)` <br />20 <br />80 <br />40 <br />27 <br />50 <br />25 <br />125 <br />63 <br />42 <br />50 <br />30 <br />180 <br />90 <br />60 <br />50 <br />35 <br />245 <br />123 <br />82 <br />50 <br />40 <br />320 <br />160 <br />107 <br />50 <br />45 <br />540 <br />270 <br />180 <br />50 <br />50 <br />600 <br />300 <br />200 <br />50 <br />55 <br />660 <br />330 <br />220 <br />50 <br />60 <br />720 <br />360 <br />240 <br />50 <br />65 <br />780 <br />390 <br />260 <br />50 <br />70 <br />840 <br />420 <br />280 <br />50 <br />75 <br />900 <br />450 <br />300 <br />50 <br />* Posted speed limit, off-peak 85. -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 />'** - I'd aximum downstream taper length is 100 feet. See Section 6C.08. <br />Prepared By: <br />Roadsafe Traffic Systems, Inc. <br />1375 Quilici Ranch Rd. <br />PO Box 1270 <br />Verdi, NV 89439 <br />(775) 622-2950 <br />Contact: Brittany Bechtold <br />TCDS Cert #920585 <br />Table 6H-4. Formulas for Determining <br />Taper Length <br />S ef'_d S <br />Taper Length L in fed <br />40 mph of less <br />L = INS 60 <br />45 mph or more <br />L = WS <br />Where: <br />L=Taper length in feet <br />W= Width of offset in feet <br />S= Posted speed limit, or off peak 85th <br />percentile speed prior to work starting, <br />or the anticipated speed in mph. <br />FLAGGER PROCEDURES: <br />FLAGGGER DIRECTIONS AT SIGNALIZED INTERSECTIONS <br />SHALL NOT BE IN CONFLICT WITH SIGNAL DISPLAYS AND <br />THE SIGNAL MUST BE EITHER SHUT DOWN OF PLACED IN <br />FLASH MODE AS APPROPRIATE FFOR THE INTERSECTION <br />OPERATION EXCEPT DURING EMERGENCIES. <br />Table 61-11-3. Meaning of Letter Codes on Typical <br />Application Diagrams <br />Road Type Distance Between Ste' fps* <br />A B C <br />Urban lowspeed)* 100 feet 100 feet 100 feet <br />Urban (high speed)* 350 feet 350 feet 350 feet <br />Rural 1 500 feet 500 feet 500 feet <br />ExOressway 1 Freewav11,000 feet1.500 feeti2,640 feet <br />www. road safetraffic.com <br />mchcs <br />MIN. <br />SIDEWALK DETOUR <br />SIDEWALK DIVERSION <br />Typical Application 28 <br />Note: See Tables 614-2 and 6H-31or the meaning <br />of the symbols ar0or letter oodees used in <br />tiffs figure. <br />* Speed category to be determined by the highway agency <br />** The column headings A, B, and C are the dimensions shown in Figures 6H-1 through 6H-46. <br />The A dimension is the distance from the transition or point of restriction to the first sign. <br />The B dimension is the distance between the first and second signs. The C dimension is the <br />distance between the second and third signs. (The "first sign" is the sign in a three -sign series <br />that is closest to the TTC zone. The "third sign" is the sign that is furthest upstream from the <br />TTC zone.) <br />Roa Sme <br />TRAFFIC SYSTEMS' <br />Life on the road <br />Sheet 1 of 2 <br />