Section 25-45 Curves.


    Curves shall comply with the following design criteria unless the director of public works determines that a more restrictive requirement is necessary to safeguard the public health, safety and general welfare from potentially hazardous street design.

    (1)    When street pavement lines or street right-of-way lines deflect, the lines shall be connected by a horizontal curve having a maximum degree of center line curvature of 57° 29' for local residential streets, 25° 00' for local nonresidential streets, 12° 30' for collector streets, 7° 30' for arterial streets, and 5° 00' for freeways, except that street right-of-way lines may deflect, provided the deflection angle is less than or equal to 10° 00'.

    (2)    A tangent segment at least two hundred (200) feet in length shall be maintained between curves on all streets, except for local residential streets.

    (3)    All vertical grade changes shall be connected by vertical curves of sufficient length to provide a smooth transition and proper sight distance. Vertical grade changes of two (2) percent or less algebraically may be connected by chords if the design engineer encounters unusual circumstances such as facilitating drainage; however, sight distances must be maintained.

(Code 1964, § 19.544(2)(C); Ord. No. 10099, § 1, 3-5-84)