1169.10 STREET HORIZONTAL STANDARDS AND SPECIFICATIONS.
Horizontal street curves shall have the following minimum radii of centerline curvature:
 
Primary and Secondary Routes
300 Feet
Arterial and Collector Streets
200 Feet
Residential Streets
100 Feet
A minimum tangent of at least one hundred (100) feet shall be provided between reversed curves on all minor streets: greater tangential lengths shall be required on collector and arterial streets, and thoroughfares.