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Figure 2 - 5. Guideline for determining the need for a major -road left -turn bay at a two-way stop -controlled intersection. <br />2-lane roadway (English) <br />INPUT <br />Variable <br />" percentile speed, mph: <br />rcent of left -turns in advanci <br />vancing volume (VA), veh/h: <br />OUTPUT <br />Value <br />42 <br />%: 26% <br />262 <br />208 <br />Variable <br />Value <br />Limiting advancing volume (VA), veh/h: <br />302 <br />Guidance for determining the need for a major -road left -turn bay: <br />Left -turn treatment NOT warranted. <br />CALIBRATION CONSTANTS <br />Variable <br />Value <br />Average time for making left -turn, s: <br />3.0 <br />Critical headway, s: <br />5.0 <br />Average time for left -turn vehicle to clear the advancing lane, s: <br />1.9 <br />Access E - 2045 Scenario 1 NBL Warrant <br />800 <br />t <br />700 <br />0 600 <br />m 500 <br />= 400 <br />> 300 <br />c 200 <br />a 100 <br />0 <br />O <br />0 <br />Itreatment not <br />100 200 300 400 500 600 700 <br />Advancing Volume (VA), veh/h <br />Page 524 of 617 <br />