(A) Minimum pavement widths for streets (as measured from back to back of curb) shall be:
Arterial | 56 ft. |
Collector* | 36 ft. |
Commercial/Industrial Alleys | 20 ft. |
Cul-de-sac Radius | 50 ft. |
Local and Cul-de-sac | 32 ft. |
Residential Alleys | 16 ft. |
*Includes all streets in areas zoned Commercial and Industrial | |
(B) All subdividers are required to construct a minimum 32-foot pavement width unless the project property line is the centerline of a dedicated street right-of-way, in which case the subdivider shall construct one-half of the required pavement width. If there is an existing street pavement within the existing right-of-way, the village may cooperate with the subdivider to upgrade the existing street pavement instead of constructing half-street improvements. The subdivider’s contribution toward upgrade of the existing street pavement shall be not less than the costs incurred to construct at least a 16-foot width of pavement.
(C) If additional pavement width beyond 32 feet and/or additional thicknesses are required, the village will participate in the additional cost.
(D) Streets shall be designed to intersect as close to a 90-degree angle as possible, and no two streets shall intersect at an angle of less than 80 degrees.
(E) Cul-de-sacs shall be provided when a street in a new subdivision is a permanent dead-end street and cannot be continued to another street.
(F) Horizontal curves shall be gradual, having a radius of at least 250 feet at the centerline, except where a lesser radius is, in the opinion of the Village Engineer, reasonably safe and adequate for anticipated traffic conditions.
(G) Pavement cross-sections shall be as depicted on the attached details. All pavements shall be constructed in accordance with the requirements of the Standard Specifications for Road and Bridge Construction, IDOT, latest edition.
(H) Pavements for streets shall be either portland cement concrete pavement or bituminous concrete pavement in accordance with these standards.
(I) All pavements shall be constructed with portland cement concrete curbs and gutters. The shape of the curb and gutter shall conform to the Standard Curb and Gutter Type B (Barrier) or Type M (Mountable). See Appendix B.
(J) Pavement grades shall be:
Minimum | 0.40% |
Maximum | 5.00% |
Crown | Three-inch to four-inch crown in all pavements |
Cross-slope | Three-sixteenths inch per ft. minimum |
(K) Radii at pavement intersections shall be (measured to back of curb):
Arterial and collector thoroughfares | 30 ft. |
Local or minor streets | 25 ft. |
(L) All cul-de-sacs shall have a minimum pavement radius of 50 feet (measured to back of curb) where the entire circle is paved. If a hole is proposed in the center of the cul-de-sac pavement, the minimum outside pavement radius shall be 60 feet (measured to back of curb), with a corresponding increase in right-of-way dedication. See the attached detail.
(M) Street jogs with centerline offsets of less than 125 feet shall not be permitted if the same can be reasonably avoided and as authorized by the Village Engineer.
(N) Provisions shall be made to grant access for future development of unplatted adjacent land at intervals of not more than one-quarter mile.
(O) (1) Blocks shall not be less than 400 feet nor more than 800 feet in length except as the Plan Commission considers necessary to secure efficient use of land or desired features in street pattern.
(2) In blocks 600 feet or more in length, the Plan Commission may require a public crosswalk for pedestrian travel to extend entirely across the block at the location deemed necessary. The crosswalk shall be constructed of portland cement concrete in conformance with these standards for sidewalks. The width of the concrete shall be four feet, and the crosswalk shall be located on a ten-foot commons area.
(P) Blocks shall be wide enough to allow two tiers of lots, except where fronting on major streets or prevented by topographical conditions or size of the property, in which case the Plan Commission will approve the single tier of lots.
(Q) Cul-de-sacs shall have a maximum length of 600 feet measured from the centerline of the intersecting street to the center of the turn-around unless, in the opinion of the Plan Commission, the topography of the land being subdivided or the physical situation of that land, makes such a restriction impractical.
(R) Where an existing street is adjacent to the subdivision, the subdivider shall improve the half of the street to conform to these standards, except that where the existing street is a township road, county highway, or state highway, the Plan Commission may waive the requirements for street improvements subject to concurrence by the entity having jurisdiction over the roadway.
(T) The design California Bearing Ratio (CBR) for street pavement subgrades shall be 3% and the CBR shall be at least 6% at the time of construction.
(U) Minimum tangent length between reverse curves shall be 100 feet.
(V) Maximum grade within 50 feet of an intersection shall be 5%.
(W) Sight triangles shall be provided via vehicular access control at all intersections of local streets with collector or arterial streets. Vehicular access control shall be not less than 50 feet along the local or subcollector street at an intersection with a collector street. Vehicular access control shall be provided for a not less than 100 feet along the arterial street at intersections with other streets.
(X) Vehicular access control shall be provided to the maximum extent possible along state and federal highways. Marginal access streets shall be provided adjacent to arterial streets wherever possible.
(Ord. 97-7, passed 7-1-1997, § 5.14.4)