Plans must be designed in accordance with the current detail sheets and standards noted herein.
(a) In general, pavement on public rights of way and private roadways in new developments shall meet current Macomb County Department of Roads paving standards for concrete or asphalt roads. The paving width, measured from back to back of curbs, shall be 28 feet for minor streets having a minimum width of 60-foot R.O.W., 36 feet for collector streets having a minimum width of 86-foot R.O.W., 36 feet for industrial streets having a 70- or 75-foot R.O.W. and 24 feet for marginal access streets having a 50-foot R.O.W. Boulevard sections for collector streets in an 86-foot R.O.W. may consist of two 19-foot pavements separated by a 16-foot island, if approved by the County Department of Roads. Cul-de-sac R.O.W. shall be 50 feet in radius with the outer back of the curb located 16 feet from the R.O.W. line. No islands in the cul-de-sac paving shall be permitted unless approved by the County Department of Roads. All paving sections shall be centered in the R.O.W., except marginal access pavements, which shall be located to provide 16 feet from the back of the curb to the property side R.O.W. line. Pavements in 120-foot R.O.W. streets shall be 29 feet wide on each side of the centerline, unless otherwise approved by the County Department of Roads.
(b) Pavement shall be installed in accordance with the applicable details and requirements as follows:
(1) All public roads and driveways shall follow either current Macomb County Department of Roads standard details and procedures or Michigan Department of Transportation standards details, where applicable.
(2) All private roads, driveways and parking areas shall follow current Clinton Township Standard Paving Detail Sheets.
(c) All street pavement in residential areas shall have 18-inch wide by 4-inch high concrete mountable curbs. Where the pavement is a boulevard section, island curbs shall be six-inch high concrete roll curbs.
(d) At the end of a street that will be extended in the future, an 18-inch wide by six-inch high concrete curb, a standard road-end barricade and a sign shall be installed.
(e) Where the Zoning Code requires off-street parking, the design of the parking area shall conform to the following requirements:
(1) All parking areas (other than driving lanes in residential or commercial parking lot areas) shall be paved with:
A. Two inches of HMA, 5EML mix (220 pounds per square yard), on two inches of HMA, 3EML mix (220 pounds per square yard), on nine inches of compacted 21AA aggregate base; or
B. Six inches of concrete pavement (3,500 psi minimum compressive strength) on six inches of compacted 21AA aggregate base.
(2) All driveway lanes in parking lots and multiple-family housing sites shall be 24 feet wide and constructed of either:
A. Concrete pavement (3,500 min. compressive strength) of six-inch minimum thickness on a six-inch 21AA aggregate limestone base (compacted to 95% dry density); or
B. Two inches of HMA, 5EML mix (220 pounds per square yard), on two inches of HMA, 3EML mix (220 pounds per square yard), on 4 inches of HMA, 2EML mix (440 pounds per square yard) on six inches of compacted 21AA aggregate base.
(3) Concrete minimum pavement thicknesses are as follows (3,500 min. compressive strength on minimum six inches of compacted 21AA aggregate):
A. Six inches (residential or commercial parking areas)
B. Seven inches (residential streets)
C. Eight inches (industrial parking areas)
D. Nine inches (industrial streets)
(4) A six-inch high concrete curb, with a minimum 12-inch wide concrete gutter, shall be placed around the entire perimeter (except along drive entrances) of the paved parking area where adjacent to grassed or sidewalk areas.
(5) Each parking stall shall be a minimum of ten feet in width and 20 feet in length and 12 feet in width and 20 feet in length for handicapped spaces. Each car space shall be marked with yellow paint stripes.
(6) When sidewalks are provided adjacent to the parking area curbs where car overhangs occur, such walks shall be a minimum width of seven feet as measured from the face of the curb.
(f) All resurfacing of existing private roads and parking lots shall comply with Michigan Department of Transportation Standards with regard to the type of mixture and other standards as relate to paving. A review of the proposed resurfacing of the current site conditions is required by the Township Engineer and is subject to engineering approval with respect to construction technique, final pavement elevation and other issues, including determining whether substantial modifications are being proposed in relation to previously approved engineering plans.
(g) Where gravel pavement is approved for outdoor storage on a site plan, the pavement section shall require a cross-section designed by a licensed professional engineer with a corresponding geotechnical report. The proposed gravel pavement section shall be subject to Township Engineer approval.
(h) In lieu of using 21AA compacted limestone aggregate for all paving sections, 21AA crushed concrete aggregate may be used if it originates from an MDOT-approved source and is installed more than 100 feet from an open watercourse.
(i) Prior to installation of the aggregate base and pavement, all pavement subgrade must pass a proof-roll inspection observed by a representative presiding on behalf of the Clinton Township Department of Public Services. Additional aggregate base or HMA/concrete pavement may be necessary for the final pavement section depending on subgrade conditions.
(j) Proposed pavement sections that deviate from Clinton Township standard paving details must equal or exceed the structural number of the minimum required pavement sections set forth in this ordinance and current standard paving detail sheets. The modified pavement sections must be prepared by a geotechnical engineer with soil boring data and conditions that support the changes.
(k) Pavement grades for all sheet flow in new and rehabilitated parking lots and streets shall meet the following slope requirements:
(1) Concrete parking areas: minimum 0.5%, maximum 7%.
(2) Asphalt parking areas: minimum 1%, maximum 7%.
(3) Concrete gutter (longitudinal): minimum 0.35%, maximum 7%.
(4) Concrete or asphalt roadway cross slopes: 2.0%.
(Ord. 281. Passed 10-2-89; Ord. 281-A-1. Passed 7-8-91; Ord. 319. Passed 12-22-97; Ord. 353. Passed 6-28-04; Ord. 369. Passed 5-14-07; Ord. 481. Passed 10-24-22.)