(A) Maximum street grades shall not exceed the following limits:
(1) For major arterials, 6%;
(2) For collector streets, 10%; and
(3) For local streets, 15%.
(B) The minimum uniform grade for all classes of streets shall not be less than 0.75%.
(C) The grade of the pavement surface across an intersection shall not be more than 6%.
(D) The gradient of each street entering an intersection shall not be more than 6% within a distance of 30 feet from the near curb line of the crossing street.
(E) Changes of grade in the vertical alignment of the streets shall be made with parabolic vertical curves. The length of the vertical curves required shall be determined by the following conditions:
Minimum
Stopping
Sight Distance | Maximum Rate of Change in Grade for Crest Vertical Curves | |
Major arterial streets | 350 ft. | 1.2% per 100 feet |
Collector streets | 200 ft. | 4% per 100 feet |
Local streets | 100 ft. | 10% per 100 feet |
(F) (1) The headlight sight distance, as determined in accordance with the standards of the State Department of Transportation for sag vertical curves, shall not be less than those listed in division (E) of this section for minimum stopping sight distances.
(2)
STOPPING SIGHT DISTANCES shall be those distances at which an object on the pavement, six inches in height, can be seen from another point three feet nine inches above the pavement surface.
(G) The minimum length of vertical curves shall be 50 feet for minor streets, 100 feet for collector streets, and 200 feet for major arterials.
('66 Code, § 9-4.611) (Ord. 275-C-S, passed 3-11-75) Penalty, see § 9-4.903