(A) The design and improvement standards are suggested minimums for all street intersections in subdivisions. All such intersections shall be designed in accordance with standards as specified in Table 6 below.
(B) Multiple intersections involving junctions of more than two streets shall not be permitted. Proposed streets shall intersect one another as nearly at right angles as topography or other limiting factors will permit.
(C) No intersection of streets on angles less than 60 degrees shall be approved unless justified by extreme topographical conditions. In such a case, special provisions as deemed necessary by the Commission shall be made.
Table 6: Intersection Design Standards | |||
Terrain Classification | Level | Rolling | Hilly |
Clear sight distance length along each approach leg | 90 feet | 90 feet | 70 feet |
Maximum approach speed | 25 mph | 25 mph | 25 mph |
Vertical alignment with intersection | Crown | 5% maximum | 5% maximum |
Minimum angle of intersection shall remain in the angle of intersection for at least 100 feet beyond the point of intersection: 60 degrees considered an absolute minimum (90 degrees preferred) | |||
Minimum Curb Radius (Feet)
|
Minimum Curb Radius (Feet)
| |
(a) Local-local | 20 - all classes |
(b) Local-collector | 30 - all classes |
(c) Collector-collector | 35 - all classes |
(d) Collector, marginal access-arterial | 40 - all classes |
Minimum Centerline Offset of Adjacent Intersection (Feet) | |
(a) Local-local | 150 - all classes |
(b) Local-collector | 150 - all classes |
(c) Collector-collector | 200 - all classes |
(d) Collector, marginal access-arterial | 1,320 - all classes |
(Prior Code, § 23.05.13) Penalty, see § 151.999