(a) The grades of streets shall not exceed the following, except that where unusual or exceptional conditions exist, the Engineer may modify these regulations:
(1) Primary streets: four percent (4%).
(2) Secondary and collector streets: seven percent (7%).
(3) Minor streets and service drives: ten percent (10%).
(4) Pedestrian ways or crosswalks: twelve percent (12%), unless steps of an acceptable design are to be constructed.
(5) In no event shall the minimum grade of any street be less than four-tenths of one percent (.4%).
(Ord. 1973-10. Passed 1-8-74.)