A. Angle Of Intersection: Streets must be designed to intersect at right angles as nearly as practical consistent with topography and sound design. In general, the acute angles at intersections for all streets shall be eighty degrees (80°) minimum. However, safety, right of way feasibility, and traffic efficiency shall be causes for variance from the eighty degree (80°) criterion.
B. Spacing Of Intersections: Intersections of streets along arterial streets are to be minimized. Following are limiting values to be observed:
1. Streets intersecting arterials must generally be spaced no closer than nine hundred feet (900') on center.
2. Intersections of streets which are not on continuous alignment through the street intersected are to be spaced as follows:
a. Intersections of noncontinuous streets must be spaced at least one hundred fifty feet (150') between centerlines of streets on local streets,
b. Three hundred feet (300') on collector streets, and
c. Four hundred feet (400') on all arterial streets.
3. Variances from these criteria will require approval of the village public works director.
C. Intersection Grading:
1. Intersections must be graded to provide characteristics consistent with the design speed of the through street. Projected curb flow line profiles through the intersection will be required for design review of major intersections involving arterial and collector streets.
2. Minor leg approach tangent gradients to intersections generally must not exceed four percent (4%) for a distance of at least fifty feet (50') back from the projected curb flow line of the through street. Deviations from this standard will require concurrence by the village public works director.
3. Street crown may be reduced through intersections of major streets of approximately equal classification if desirable to promote comfort. Crown reduction should not generally exceed one- half (1/2) of standard crown unless special circumstances govern and concurrence by the village public works director is obtained. Intersection grading must provide for rapid drainage.
4. Grades intended to serve as drainage water blocks may only be designed on minor approach legs of intersections. Maximum height of such water blocks allowed will be twelve inches (12") as measured vertically from the projected gutter flow line elevation of the major or through street to the gutter flow line elevations at the high point of the minor leg gutter. Vertical curves of a minimum length of fifty feet (50') must be provided for water block configuration. Adequate stopping sight distance must be provided in the design conforming to the criteria given in table 7-B in section 7-1-5-2 of this chapter.
5. Intersection designs must provide for clear sight distances in the horizontal plane. Designs should comply with the following criteria:
a. No such obstruction to view between three (3) and eight feet (8') above the gutter line shall be placed or maintained within a triangular area at the street corner, which area is bounded by: 1) the street property lines of the corner lot and a line connecting points twenty five feet (25') distant from the intersection of the property lines of such lot, or 2) the curb lines of an intersection and a line connecting points thirty five feet (35') distant from the corner of the intersection and such corner is determined by projecting the curb lines out to a specific point, whichever is the lesser.
6. The designer should specifically investigate intersection design to assure that design flows will not overtop curbs resulting in damage outside the right of way. (Ord. 2007-06, 8-14-2007)