(a) Arrangement. The arrangement, character, extent, width, and location of all streets shall conform to the parks and open space plan and the thoroughfare plan of current adoption. The design of the proposed streets shall provide for the continuation of existing streets and access to adjacent unplatted lands so that the entire area can be served with a coordinated street system.
(b) Street Classifications.
(1) Major arterial thoroughfares shall be planned for the continuation of movement of fast traffic entering or leaving the urban area, or between points of heavy traffic generation and from one section of a community to another. Major arterials should have few intersections with local streets and collector thoroughfares. These thoroughfares should be spaced at least one and one-half miles apart.
(2) Minor arterial thoroughfares should interconnect with and augment the major arterial system. Minor arterials should provide for intra-community trips and movement of traffic from heavy traffic generators to major arterial thoroughfares. Minor arterials should contain few intersections with local streets. These thoroughfares should be spaced at least three-fourths mile apart.
(3) Collector thoroughfares shall provide a traffic route from local streets to arterial thoroughfares. Collector streets normally contain a relatively large number of intersections with major or minor arterial streets. These streets should be spaced at least one-fourth mile apart.
(4) Local streets shall provide direct and full access to each lot and shall be laid out so that their use by through traffic will be discouraged.
(5) Service drives may be required along existing or proposed major or minor arterial streets to provide access to lots along these thoroughfares. Service drives shall be designed to provide a secondary means of access.
(c) Street widths and grades. See Table I following this section.
(d) Half streets. Half streets shall be prohibited. (Ord. 91-35. Passed 5-20-91.)
(e) Cul-de-sacs and dead-end streets.
(1) Permanent. Streets designed to be used as cul-de-sacs shall not be longer than 800 feet and shall be provided at the closed end with a turnaround having an outside pavement diameter of at least eighty feet and a street right-of-way line diameter of at least 100 feet. Dead-end streets are not permitted.
(2) Temporary. Where streets are extended to the boundary of a particular block or the exterior boundary of a subdivision with the intent to extend them onto the adjacent land in the future, they shall be terminated with a tee-type turnaround located within the right of way. A granular base and asphalt concrete surface shall be provided as directed by the Village Engineer. Temporary dead-end streets extending out not more than one lot depth beyond a street intersection do not require this tee-type turnaround.
(Ord. 91-35. Passed 5-20-91.)
(f) Reserve strips. Reserve strips controlling access shall be prohibited.
(Ord. 81-56. Passed 12-28-81.)
(g) Alignment considerations.
(1) Proposed streets shall either meet existing cross-street intersections or be offset a minimum of 150 feet.
(2) Intersections shall be aligned at ninety degrees whenever possible. No street shall intersect another at less than seventy degrees.
(3) Intersection approaches shall be straight for a minimum of 100 feet beyond the centerline of the street being intersected.
(4) A tangent of at least 100 feet shall be placed between reverse curves.
(5) Intersection approaches shall not exceed a three percent (3%) grade (positive or negative) for a distance of at least 100 feet beyond the centerline of the street being intersected.
(Ord. 91-35. Passed 5-20-91.)
TABLE I
STREET DESIGN STANDARDS | |||||||
Street Classification | Minimu m Right- of-Way (feet) | Minimu m Paveme nt Width (feet) | Maximu m Degree of Curvatur e (Arc Definitio n) | Minimu m Radius of Curvatur e (f) (feet) | Maxim um Percent of Grade | Vertical Visibilit y (feet) (g) | Minimu m Corner Radii (feet) (d) |
Major arterial thoroughfare | 100 a. | b. | 3º | 1,910 | 4.0% | 500 | b. |
Minor arterial thoroughfare | 80 a. | b. | 5º | 1,150 | 5.0% | 300 | b. |
Collector thoroughfare | 60 a. | b. | 10º | 575 | 6.0% | 250 | b. |
Local Street (commercial or industrial) | 50 a. | 30 | 10º | 575 | 6.0% | 250 | 40 |
Local residential streets and cul-de-sacs | 50 a. | 28 | 20º | 290 | 7.0%c. | 200 | 25 |
NOTES:
a. Where a boulevard-type street is proposed, the minimum right-of-way shall be increased by an amount equal to the width of the proposed median.
b. Requirement will vary with design speed and capacity (To be determined by the Village Engineer).
c. Maximum may be greater due to topography if in accord with the application of standard engineering practice (To be approved by the Village Engineer).
d. Right-of-way line of street.
e. Pavement width dimensions are minimum measured from face to face of curb.
f. Radius of curvature is measured along centerline of streets.
g. Dimensions for distance of vertical visibility shall be measured from a point three and one-half feet above the street surface on one side of a vertical curve to a point six inches above the street on the opposite side.