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Planning Level Urban Roadway Capacities <br />Daily Two-way Volume <br />(vehicles) <br />Lower Higher <br />Facility Type Threshold Threshold <br />Two lane undivided 10,000 12,000 <br />Two lane divided or <br />Three lane undivided <br />Arterials <br />Four lane undivided <br />Four lane divided or <br />five lane undivided <br />Four lane freeway <br />15,000 17,000 <br />18,000 22,000 <br />28,000 32,000 <br />60,000 80,000 <br />Freewa�i Six lane freeway 90,000 1 120,000 1 <br />Eight lane freeway or Calculated on a segment by <br />higher segment basis <br />Choice of Roadway Section <br />Based on ADT and Access Spacing <br />--------------------------------------- <br />6 -Lane UnMee <br />•..�:m snum�axrs <br />aayc Plane <br />Aaesse o, 5 10 <br />Avt �xmg 660 ft. <br />1,g Ml <br />J Lane <br />"nd"'dad <br />n -Lam owed <br />L ar.e <br />witli r:�:x rn Ian r: <br />w sna W ders <br />30' 35 d0' 45' 50' __ 60' 95 <br />330,1 150 R. <br />7 <br />,,. 20,40 <br />15.iu'I <br />d <br />i <br />� iu.uc <br />S,ee <br />Practical Operating Ranges <br />fur Roadway Design Types <br />21 me 3 -Law A Le1K I Lane <br />unidiwkd Divided <br />