TABLE 1

DESIGN CHARACTERISTICS FOR STREETS Surface Characteristics (1)
Pavement Type and Materials Used (2)	Minimum Thickness
	Arterial	Collector	Local/Subdivision	Alley*
1.   Portland Cement Concrete(uniform thickness)	(1)	7"	6"	6"
2.   Soil-Cement Base	(1)	7"	6"	6"
Bituminous Mat. Surface    (not mix)		2"	2"	2"
3.   Flexible Base (gravel or crushed stone)	(1)	8"	8"	8"
Bituminous Surface Treatment	Subclass A3 or equivalent
4.   Bituminous Aggregate	(1)	7"	7"	-
Mixture (BAM) Base Bituminous Concrete Class 1		1.5"	1.5"	-
5.   Flexible Base (gravel or crushed stone)	(1)	8"	8"	-
Bituminous Concrete Class	1	2"	2"	-
* Where permitted ** As per requirements of the Mattoon Zoning Ordinance

 

Distances, Grades & Dimensions
	Arterial	Collector	Local/Subdivision	Alley
1.   Right-of-way (minimum)	80'	60'	60'	20'
2.   Horizontal and Vertical (3) Visibility	500'	350'	200'	-
3.   Minimum Radius (on curves)	1200'	300'	250'	-
4.   Maximum Grades	5 (4)	6 (5)	8 (5)	-
5.   Minimum Setbacks	**	**	**	**
6.   Pavement Width	(7)	(7)	(7)	-
7.   Curb & Gutter Requirement	(8)	(3)	(3)	-
* Where permitted ** As per requirements of the Mattoon Zoning Ordinance

 

NOTATIONS REFERENCED FROM TABLE ONE

   (1)   Pavement design shall conform to the design standards established by the Design Manual, as amended, of the Illinois Department of Transportation, Bureau of Design; except, that standards shown in Table 1 represent absolute minimums.

   (2)   All definitions and descriptions of paving materials shall conform to Illinois Department of Transportation’s specifications.

   (3)   As measured along the road pavement.

   (4)   The gradient within 100 feet of a street or road intersection shall not exceed 2%.

   (5)   The gradient within 100 feet of a street or road intersection shall not exceed 3%.

   (6)   As measured from the road rights-of-way to the building setback line.

   (7)   For two lane undivided pavements, minimum pavement driving surfaces (pavement edge to pavement edge) shall be not less than 24 feet in width, except that: when lot width averages as measured at the building setback line is less than 100 feet in width or the average lot area is 10,000 square feet or less, the pavement shall not be less than 36 feet in width (pavement edge to pavement edge); further provided, that when lot width averages at the building setback line are equal to or greater than 100 feet but less than 150 feet and the lot area is greater than 10,000 square feet but less than 15,000 square feet, the pavement width shall be not less than 26 feet in width (pavement edge to pavement edge).

   (8)   Curbs and gutters shall be required as specified in § 157.51.