A street that has a single means of ingress and egress and terminates in a vehicular turnaround. Where natural topography and original tract composition allow, internal flow within a subdivision will take precedence over the use of several, repeated, or back-to-back cul-de-sacs. Lengths of cul-de-sacs are limited to minimize backup time for large service and emergency vehicles unable to use the turnaround, to minimize mistaking cul-de-sacs with connecting streets, to discourage speeding, and to limit the number of families stranded in emergency or repair situations where the road is cut or blocked off. Cul-de-sacs in a commercial or industrial zoning district will meet additional width and right-of-way requirements. Back to back or adjoining residential cul-de-sacs will be joined by a public sidewalk.
DESIGN ELEMENTS FOR CUL-DE-SACS | DIMENSIONS IN FEET OR PERCENT |
Minimum Right-of-Way: | 50' |
Minimum Pavement Width: Curb face to curb face Curb and gutter required | 26' |
Minimum Cul-de-Sac Bulb - Right-of-Way Pavement Width | 55' radius 44' radius * |
Maximum Cul-de-Sac Length (Center of bulb to center of intersection) | 500' |
Maximum Grade | 10% |
Maximum Grade within 50 feet of an Intersection | 5% |
Minimum Grade | 0.5% |
Minimum Radius of Centerline | 150' |
Minimum Tangent Length Between Reverse Curves | 50' |
Minimum Curb Radii | 25' |
Minimum Stopping Distance | 170' |
Minimum Grassed Area Between Sidewalk and Curb | 4 |
* This minimum requirement will be increased upon the request of the local fire department or school district.
(Ord. 19-20. Passed 11-4-20.)