(a) The grades of streets shall be not less than one-half of one percent (0.5%) and shall not exceed the following:
(1) Highways and primary thoroughfares, shown as such on the Thoroughfare Plan: five percent (5%).
(2) Secondary thoroughfares, parkways, local or collector streets: seven percent (7%)
(3) Minor streets, service drives and alleys: ten percent (10%).
(4) Pedestrian ways or crosswalks: twelve percent (12%) unless steps of an acceptable design are constructed.
(b) All changes in street grades above one percent (1%) shall be connected by vertical curves of a minimum length equal to fifteen times the algebraic difference in the change of grade for highways, thoroughfares and parkways, and one-half of this minimum for all other streets.
(c) The radii of curvature on the center line shall not be less than the following: highways, thoroughfares and parkways, shown as such on the Thoroughfare Plan, 600 feet.
(Ord. 64-47. Passed 4-27-64.)