(a) Streets.
(1) Classification. All streets in a subdivision shall be classified and governed in accordance with till following table:
A | B1 | C2 | D | E4 | F5&6 | |
(see note 1) | (see note 2) | (see note 4) | (see notes 5&6) | |||
Classification of street | Right-of- way width (ft.) | Pavement width (ft.) | Max. grade (%) | Max. curvature (degrees) | Radius of curvature (ft.) | Vertical visibility (ft.) |
A | B1 | C2 | D | E4 | F5&6 | |
(see note 1) | (see note 2) | (see note 4) | (see notes 5&6) | |||
Classification of street | Right-of- way width (ft.) | Pavement width (ft.) | Max. grade (%) | Max. curvature (degrees) | Radius of curvature (ft.) | Vertical visibility (ft.) |
Primary thoroughfare | 80 | 44 | 5 | 11.5 | 500 | 500 |
Secondary thoroughfare | 60 | 40 | 5 | 14 | 400 | 400 |
Collector street Urban Rural | 60 60 | 36 41 | 7 7 | 19 19 | 300 300 | 200 200 |
Local street Urban Rural | 50 50 | 36 31 | 10 10 | (see Note 3) | (see Note 3) | |
Special Multi-family, business and industrial | To be determined by Council. The pavement width need not exceed forty feet in any case. | |||||
Notes:
1. This dimension is determined by measuring back to back of curb.
2. The minimum street grade is one percent.
3. The degree of curvature shall be determined by a minimum curb radius of thirty-five feet.
4. All dimensions in Column E are street centerline measurements.
5. All dimensions in Column F shall be measured from four and one-half feet above the street surface to an object four inches above the street surface.
6. All changes in grade shall be made by vertical curves of minimum length equal to 100 times the algebraic difference in rate of grade for thoroughfares and one-half such minimum length for collector and local streets using the nearest twenty-five foot length of curve.
7. All subdivisions (platted or unplatted) shall be required to dedicate necessary rights-of- way when streets involved in such subdivisions are part of the Official Thoroughfare Plan. However, in the case of a lot split, if the grantor wishes to dedicate additional rights-of-way along his or her entire road frontage, the County Prosecutor's Office or the Department of Law, whichever is applicable, will handle the necessary paperwork.
(2) Intersection; curb radius.
A. Grade. Street grades shall not exceed three percent within a distance of 100 feet from an intersection.
B. Curb radius. All street pavements shall intersect each other as near to right angles as possible. At right angle intersections, the curb radius shall be fifteen feet at intersections involving two fifty-foot rights-of-way. At all other street intersections, the curb radius shall be twenty-five feet unless specified otherwise by the Director of Public Service. At intersections where the angle is other than ninety degrees, the Director shall determine acceptable curb radii.
(3) Dead ends. When a cul-de-sac is permitted, the minimum road surface radius within the turn-around shall be forty feet. The surface configuration for a temporary cul-de-sac shall be according to Municipal standards.
(b) Drainage. Where curbs and gutters are involved, curb inlets shall be constructed on the upstream side of the crosswalks. At points where drainage ditches enter the area being developed, grate inlets are required. Spacing of curb inlets on streets shall be as indicated by the principles of good design.
(Ord. 83-32. Passed 8-15-83.)