Chapter 25 SUBDIVISIONS*
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,
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)