§ 155.047  STREET DESIGN STANDARDS.
   NOTE: Any exceptions to these standards must be approved in writing by the City Engineer.
Primary & Secondary
Industrial
Collector
Local, Alley Cul-de-Sac
Primary & Secondary
Industrial
Collector
Local, Alley Cul-de-Sac
Minimum centerline grade
0.5%
0.5%
0.5%
0.5%
Maximum centerline grade2
5.0%
5.0%
5.0%
12.0%
Minimum length of Vertical Curve3
100 feet
100 feet
50 feet
50 feet
Maximum Radius of Centerline Curve
575 feet
575 feet
400 feet
400 feet
Minimum Length of tangent between horizontal curves
100 feet
100 feet
50 feet
50 feet
Minimum back of curb or edge of pavement radius
40 feet
40 feet
25 feet
25 feet
Minimum stopping sight distance4
400 feet
400 feet
300 feet
200 feet
Max. Centerline grade approaching intersection5
2.0%
2.0%
4.0%
6.0%
Cul-de-Sac Pavement turnaround diameter back to back of curb6
-----
100 feet
-----
80 feet
Minimum traffic lane width for multilane streets7
12 feet
12 feet
12 feet
12 feet
Maximum driveway grade shall be
15%
15%
15%
15%
2 Maximum grades for pedestrian way shall be 6% unless steps are to be of an acceptable design are to be constructed.
3 All changes in street grades shall be connected by vertical curves of a minimum length equivalent to 15 times the algebraic difference between the rates in grade
4 Measured from an eye level of 3.5 feet to a six inch object
5 The grades shown shall apply for a distance of 50 feet from an intersection with the curb line of another street.
6 A “T” or “Y” shaped turn around shall not be used unless the City Engineer has approved design.
7 Underdrains - Four-inch ADS perforated underdrains with sock shall be installed per the Standard Underdrain Detail drawing, located in the appendix to Exhibit “A” attached to Ordinance 16-2020.
(Ord. - -, passed - -03; Am. Ord. 16-2020, passed 12-7-20)