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copy NCOOT <br />Sight distance provided for stopped vehicles at <br />intersections should be in accordance with A Policy On <br />Geometric Design of Highways and Streets (AASHTO). <br />4. The following table shows the maximum degree of <br />curve and related maximum superelevation for design <br />speeds. The maximum rate of roadway superelevation <br />(e) for rural roads with no curb and gutter is <br />0.08. The maximum rate of superelevation for urban <br />streets with curb and gutter is 0.06 with 0.04 <br />desirable. <br />--- * K is a coefficient by <br />in grade may be multiplied to <br />the vertical curve which will <br />Design Speed Max. <br />MPH e* <br />which the algebraic difference <br />determine the length in feet of <br />provide minimum sight distance. <br />Minimum Maximum Degree <br />Radius of Curve <br />Feet Degrees <br />20 <br />.04 <br />125 <br />45.0 <br />30 <br />.04 <br />300 <br />19.0 <br />40 <br />.04 <br />560 <br />10.0 <br />50 <br />.04 <br />925 <br />6.0 <br />60 <br />.04 <br />1410 <br />4.0 <br />20 <br />.06 <br />115 <br />50.0 <br />30 <br />.06 <br />275 <br />21.0 <br />40 <br />.06 <br />510 <br />11.5 <br />50 <br />.06 <br />830 <br />7.0 <br />60 <br />.06 <br />1260 <br />4.5 <br />20 <br />.08 <br />110 <br />53.5 <br />30 <br />.08 <br />250 <br />23.0 <br />40 <br />.08 <br />460 <br />12.5 <br />50 <br />.08 <br />760 <br />7.5 <br />60 <br />.08 <br />1140 <br />5.0 <br />* e = rate of roadway superelevation, foot per <br />foot <br />D. Intersections <br />1. Streets shall be laid out so as to intersect as <br />nearly as possible to right angles, and no street <br />should intersect any other at an angle of less <br />than sixty degrees. <br />2. Property lines at intersections should be set <br />so that the distance from the edge of pavement, of <br />the street turnout, be <br />at least as great g of <br />M- <br />