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TABLE A <br /> MINIMUM RECOMMENDED DELINEATOR AND SIGN PLACEMENT <br /> Table A-1 <br /> Taper Length Criteria for Temporary Traffic Control Zones <br /> Type of Taper Taper Length <br /> Upstream Tapers <br /> Merging Taper L MINIMUM <br /> Shifting Taper 1/2 L Minimum <br /> Shoulder Taper 1/3 L Minimum <br /> Two-Way Traffic Taper 100 feet Maximum <br /> Downstream Tapers <br /> (Use is optional) 100 feet Minimum <br /> Formula for Taper Length `L' <br /> L=WSZ (40 mph or less) L=WS (45 mph or greater) <br /> 60 <br /> L =Taper Length in feet <br /> W=Width of Offset in feet <br /> S = Speed in mph <br /> Table A-2 <br /> Suggested Advance Warning Sign Spacing <br /> Distance Between Signs <br /> Road Type in Feet <br /> S <br /> Urban - 25 mph or less 200 <br /> Urban - 30 mph or more 350 <br /> Rural 500 <br /> Expressway/Freeway 1000 <br /> Table A-3 <br /> Taper Length and Buffer Space <br /> Use in Typical Applications Diagrams <br /> Length of Taper V in Feet Longitudinal Buffer Space <br /> Speed in Speed in Length of <br /> Miles Width of Offset** Miles Buffer Space <br /> per Hour* 11 Feet 12 Feet per Hour* in Feet <br /> 20 73 80 20 35 <br /> 25 _ _115 _ 125 25 55 <br /> _30 165 180 30 85 <br /> 35 225 245 35 120 <br /> 40 293 320 40 170 <br /> 45 495 540 45 220 <br /> _ 50 550 600 50 280 <br /> 55 605 660 55 335_ <br /> 60 _ 660 720 60 415 _ <br /> 65 _715 ___ 780 65 485 <br /> --- 70 — 770 840 - 70 585 - - - <br /> * Posted speed, off-peak 85th percentille speed prior to starting, or <br /> the anticipated operation speed. <br /> ** For other offset widths, apply the formula in table A=1. <br /> Xi <br />