The following requirements are applicable to all subdivisions within the city.
(A) The grades of any street or alley shall not be less than 0.4%. Where specifically approved by the City Engineer, alleys may be designed with 0.25% grade when constructed with concrete pavement.
(B) The grades in all streets, arterial highways, collector streets, minor streets and alleys in any subdivision shall not be greater than the maximum grades for each classification as follows.
Type of Street or Way | Maximum Grade |
Type of Street or Way | Maximum Grade |
Alley | 8% |
Collector street | 6% |
Local street | 8% |
Minor arterial highway | 6% |
Pedestrian way | 20%* |
Principal arterial highway | 6% |
NOTES TO TABLE: * Grade of pedestrian way may be increased if steps of an acceptable design are provided. | |
(C) All changes in street grade of 1% or more shall be connected by vertical curves. The length of the vertical curve will be determined on the basis of providing stop sign distances for each road classification where design speed for arterial and collector streets is 40 mph and 25 mph for local streets. In no case shall the length of the required vertical curve be less than 15 times the algebraic difference in rate of grades for arterial and collector streets or one-half of this minimum for all other streets.
(D) The radius of curvature on the centerline of the street shall not be less than that required to produce stop sign distance as defined in division (C) above. In no case, however, shall the radius of curvature for arterial and collector streets be less than 300 feet, or be less than 100 feet for local streets, service drives and alleys.
(2004 Code, § 153.76) (Ord. 466, passed 7-15-1995)