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5-48 TRAFFIC CONTROLS Traffic Manual 1 1990 Figure 5-9 TYPICAL LANE CLOSURE (TRAFFIC CONTROL SYSTEM FOR MULTILANE CONVENTIONAL HIGHWAYS) f.a 00111- 011111111, 0111-011111111, i.er i fir Irr ii I iso .. �- . . . . . . — . . . V..R.WM"I.0 liMM WO Y)]O 6"M f MY 71. • 11/:I f J/I./.// _, � f I t WORKran ter[ nw ust ROAD 11006 NEA CL4196 nOiu No Scale Cu Aa[AR APOW (See note 61 C23 C20(lit} C20(Rt} (Sea note 3 thru 5) Legend TABLE 1 }. Sign APPROACH TAPER NUMBER SPACAIQ OF CONES 0 Cone or Portable Delineator SPEED L.ENdTH OF CONES ALONG TAPER (MPH) (L) * FOR TAPER* (fist) t =iillbDirection of Traffic 25 12S 6 25 a Flashing Arrow Sign (Optional) 30 180 7 30 NOTES. 35 245 a 35 Taper formula 40 320 9 40 L - S x W for speeds of 45 or more 4S 540 13 45 L - WS' for speeds of 40 or less 50 600 13 50 60 Where 50+ 1000 21 50 L = Minimum length of taper S = Numerical value of posted (*1 eased on 12-foot wide lane This column is also appropriate for lane widths speed limit prior to work or less than 12 feet SS percentile speed W - Width of offset SPECIAL NOTE: Field conditions could require deviations from these plans and accompanying notes NOTES. 1 This plan does not apply where there are 5 A C18 'ROAD CONSTRUCTION AHEAD" sign emergency conditions Under emergency condi. may be used In lieu of the C23 (See Note 3) tions, equipment and personnel which are 6 A C13 "END CONSTRUCTION' sign, as ap- available should be utilized to implement a propriste may be used in lieu of the C14 The sign closure even though such closure does not meet the standards contained in this plan As equip- is optional 1t the end of work zone Is obvious or ment or personnel become available an lm- falls within a larger project limit mediate effort should then be made to implement 7 Warning (W) series signs used In work zones the standards shown on this plan shall be black on orange Existing yellow warn- 2 Where approach speeds are low, signs may be ing signs already in place within these areas may placed at 300 feet spacings,and even closer in remain in use urban areas 8 Pavement markings for closures shall conform 3 All advance warning signs shall be 48" x 48" to Section 5-05 of this manual . minimum on highways with approach speeds of 9 All cones shall be internally lliuminated or fitted 45 mph or more When speeds are less than 4S with reflective white sleeves for night closures mph the C23 sign shall be 30" x 30" minimum, (See Section 5-03 3) other advance warning signs shall be 36' x 36" minimum (See Note 5) 10 The maximum spacing between cttiannelizing devices in a taper should be approximately equal 4 All warning signs for night closures shall be In feet to the speed limit (See Table 1) either illuminated or refleclorized