A. The streets shall intersect as nearly as possible at right angles, and no street shall intersect another street at less than seventy five degrees (75°). Street intersections with centerline offsets of less than one hundred twenty five feet (125') are prohibited.
B. The vertical grade for the streets shall not be less than three-tenths of one percent (0.3%) for local streets and one- half of one percent (0.5%) for arterial and collector streets, and not greater than seven percent (7%) for any class of street. Vertical curves shall be used for all changes of grade of one percent (1%) or greater.
C. Horizontal curves shall be utilized for all deflections of centerline tangents exceeding two degrees (2°). A tangent of at least one hundred feet (100') shall be provided between curves on arterial and collector streets where the curve radius is less than five hundred feet (500').
D. The minimum allowable sight distance shall be three hundred feet (300') for arterial and collector streets and two hundred feet (200') for local streets.
E. The minimum right of way and pavement width excluding curb and gutter shall be:
1. Arterial streets shall have an eighty foot (80') right of way and forty six feet (46') of pavement. Boulevards when provided, shall have a minimum median width of sixteen feet (16'), edge to edge of pavement.
2. Collector streets shall have a sixty foot (60') right of way and thirty six feet (36') of pavement.
3. Local streets shall have a fifty foot (50') right of way and twenty eight feet (28') of pavement.
4. Cul-de-sacs shall have a radius of forty five feet (45') for right of way and a pavement radius of thirty five feet (35') to the edge of pavement. The center of the cul-de-sac shall be located between the centerline of the approach right of way to twenty feet (20') left of the centerline (facing the cul-de-sac). The pavement shall be centered to the right of way. (Ord. 530, 3-23-1998)
F. All street pavements shall be constructed utilizing a minimum of eight inches (8") aggregate base course and three inches (3") of bituminous concrete surface course, class 1, conforming with the most recent edition of the standard specifications for road and bridge construction of the Illinois department of transportation. The aggregate base course shall be crushed gravel or crushed stone. All street pavements shall be crowned utilizing a minimum slope of three-sixteenths inch (3/16") per foot. On an arterial or collector street, the proposed pavement design shall be submitted to the city engineer for review. (Ord. 635, 5-13-2002)
G. All street pavements shall be constructed with Portland cement concrete curbs and gutters conforming to Illinois highway standard 606001, type B-6.12, except type B-6.18 shall be utilized for arterial and collector streets. (Ord. 587, 8-14-2000)
H. All underground utilities that lie or cross under the pavement, curb and gutter, or sidewalk shall be constructed prior to construction of the pavement, curb and gutter, or sidewalk. All utility trenches beneath proposed pavements, curbs and gutter, or sidewalk, shall be backfilled with compacted granular trench backfill materials to a point two feet (2') beyond the edge of pavement, back of curb, or back of sidewalk or to the right of way line.
I. All arterial and collector streets shall be provided pavement markings where appropriate.
J. Curb ramps accessible to the disabled, conforming with Illinois highway standard 424001, shall be provided at all intersections on streets having sidewalks.
K. Portland cement concrete sidewalks shall be provided in all subdivisions except in block 3 as governed by ordinance 88. The sidewalks shall have a minimum width of forty eight inches (48") and a minimum thickness of four inches (4"). The back of the sidewalk shall be located six inches (6") inside of the right of way line. Sidewalks shall be constructed a minimum of six inches (6") above the top of curb grade. The maximum slope between the top of curb and the front of the sidewalk shall be one foot (1') vertical per six feet (6') horizontal. Transverse expansion joints, three-fourths inch (3/4") thick, shall be placed at intervals not greater than one hundred feet (100') in the sidewalk. The surface of the sidewalks shall be grooved at right angles to the centerline of the sidewalk at intervals not less than four feet (4') and not greater than six feet (6'). Driveways shall be constructed through the sidewalk with a minimum thickness of six inches (6"). (Ord. 530, 3-23-1998)