(A) Where curvilinear horizontal alignment is utilized for subdivision streets, the minimum centerline radius shall be as indicated below, unless otherwise dictated by site constraints and reviewed by the City Engineer:
(1) Arterial and commercial collector street - according to the IDOT “Bureau or Local Roads and Streets Manual,” Chapter 29.
(2) Residential collector street -150 feet; and
(3) Local street - 75 feet.
(B) If horizontal reverse curves are to be utilized on any collector street or arterial street, the radii of which are less than 300 feet, a tangent at least 100 feet in length shall be introduced between the curves, as depicted on the standard specification plan sheets.
(C) The minimum vertical curve length shall be as indicated below, unless otherwise dictated by site constraints and reviewed by the City Engineer:
(1) Arterial and commercial collector street - according to the IDOT “Bureau or Local Roads and Streets Manual,” Chapter 30.
(2) Residential collector street -120 feet; and
(3) Local street - 90 feet.
(Ord. 2009-26, § 18.5-3-21, passed 10-5-2009; Am. Ord. 2016-29, passed 11-7-2016)