(A) Intersections shall be planned and designed to provide a safe system for present and prospective traffic. Intersections shall be graded to provide positive drainage and shall conform to the alignment and grading requirements of these standards.
(B) The following standards shall apply to intersection design:
DESIGN CONSIDERATION
Approach speed | 25 mph | 20 mph |
Sight distance (Min.) | 250 feet | 200 feet |
Grade within 100 feet | 0.5% to 2% | 4% (max.) |
Minimum Angle | 75 degrees | 75 degrees |
Minimum Curb Radius | ||
Local Streets | 25 feet* | 30 feet |
Collector Streets | 50 feet | 50 feet |
Arterial Streets | 60 feet | 60 feet |
Minimum Jogs | ||
Local Streets | 150 feet | 150 feet |
Collector Streets | 200 feet | 200 feet |
Arterial Streets | 200 feet | 300 feet |
* 30 feet where occasional truck traffic expected | ||
(C) Invert of intersecting streets shall align with the tangent line of the gutter through the intersection with the direction of flow. Note that variable intersection grades require radius grade change point to begin where the tangent of the back of curb intersects the gutter flow line.
(D) It is understood that the sight distances listed above are a minimum and that longer sight distances may be required where topography will allow and/or higher speeds are present and/or when streets with a classification of collector or higher are involved.
(Ord. 2009-11-347, passed 11-3-09; Am. Ord. 2010-06-356, passed 6-1-10; Am. Ord. 2018-11-816, passed 11-6-18)