Laserfiche WebLink
Work Area Protection and Traffic Control Manual <br /> TABLE A <br /> MINIMUM RECOMMENDED DELINEATOR AND SIGN PLACEMENT <br /> TRAFFIC SPEED TAPER LENGTH (L) DELINEATOR SPACING SIGN SPACING(S) <br /> (advance of Taper& <br /> km/h <br /> between signs) <br /> m <br /> 25 MPH (40) 125 ft. (40) 25 ft, m m <br /> 30 MPH (45) 180 ft. (55) 30 ft. (8) 300 ft. (g0) <br /> ( 300 ft. <br /> 35 MPH (50) 245 ft, (75) 35 ft. (g0) <br /> 40 MPH (60) 320 ft. (100) 40 ft. (11 1) 300 ft. (90) <br /> (12) 320 <br /> "45 MPH (70) 540 ft. (165) 45 ft. ft (100) <br /> 50 MPH (80) 600 ft. (185) 56 ft. (14) 540 ft. (165) <br /> (15) 600 ft. (185) <br /> '55+MPH (85) 1 1000 ft. (305) 55 ft. <br /> (15) 750 ft. (230) <br /> 1. A flashing arrow sign shall be used for each lane closed. (where required) <br /> 2. Two-lane closure signs ( C-20 ) shall be used on the approach to a lane closure with <br /> speeds of 45 mph (70 Km/h) or greater. <br /> NOTE: This table is based on 12—foot (4m) wide lanes. <br /> For lane widths greater than 12 feet (4m), use the following formula: <br /> Taper formula: <br /> L=S x W for speeds of 45 or more. <br /> L= S x 2/3 W for speeds of 70 Km/h or more. <br /> L=W S2 _60, for speeds of 40 mph or less. <br /> L =WS2 _ 150, for speeds of 65 Km/h or less. <br /> Where: <br /> L= Minimum length of taper. <br /> S= Numerical value of posted speed limit prior to work, unless otherwise specified by <br /> permitting agency. <br /> W = Width of offset. <br /> i.e. 40 mph and 19' lane; L= 19 x 402 _ 60 = 507 feet. <br /> i.e. 50 mph and 19' lane; L=50 x 19=950 feet. <br /> i.e. 65 km/h and 6m lane; L=6x 652 _ 150 = 169 meters. <br /> i.e. 80 km/h and 6m lane; L=80 x (2/3)6 =320 meters. <br /> PLEASE NOTE; This Attachment was missing from the August 1999 revision of the Work Area <br /> Protection and Traffic Control Manual. In addition, the following omissions were discovered after <br /> printing. We apologize for the inconvenience. <br /> Page 3 item 10. The sentence should read: When lanes are to be closed, place the lane closure signs <br /> well in advance of the taper. If a minimum of ten-foot (3-meter) lane width cannot be maintained, the <br /> lane must be closed. <br /> Drawings 2 —35 Do not show the" • " , which is the symbol for the Traffic Cone or Delineator. <br /> Table A Revised 12/99 <br />