[Added 5-12-2015 by Bill No. 2015-03]
A. 
Roadways planned within new residential subdivisions shall include street geometrics that make roads less desirable for speeding and cut-through traffic. Speed control measures within residential neighborhoods in the development district shall be incorporated into the design of all local and minor collector roads longer than 1,500 feet. The Highway Engineer may also require evaluation of the need for speed control measures on other proposed roadways. Speed control measures for new neighborhood residential streets shall consist of a combination of any of the following preferred measures:
(1) 
Road curvature;
(2) 
Breaks in road continuity, such as T-intersections;
(3) 
Traffic circles; and
(4) 
Roundabouts.
B. 
Additional types of speed control measures, such as speed humps, chokers, center medians or other traffic calming measures, may be allowed by the Highway Engineer on a case-by-case basis where preferred speed control measures are not practical.
C. 
Speed control points shall be spaced approximately 500 feet apart on local roads and 600 feet apart on minor collector roads. The maximum spacing between speed control points shall be 750 feet.
D. 
A speed control point is defined as the location of any one of the following:
(1) 
Any design condition that requires a complete stop, such as at a T-intersection. Unwarranted stop-sign control at an intersection will not be permitted; or
(2) 
A horizontal curve with a deflection angle of 51° or greater and a maximum radius of 175 feet for local roads and 300 feet for minor collector roads; or
(3) 
A speed control measure, as identified as a Level II traffic calming measure in Appendix I. The type of measure and design is subject to review and approval by the Highway Engineer.
E. 
Where proposed residential subdivisions provide roadway connections to existing residential neighborhoods, an evaluation of the need for speed control measures along the access route through the existing neighborhood may be required by the Highway Engineer. Where warranted, the developer shall install traffic calming measures as described in the Neighborhood Traffic Calming Program (NTCP) contained in Appendix I of this chapter.
Existing residential neighborhood roads may qualify for speed control measures in accordance with the criteria identified in the Neighborhood Traffic Calming Program contained in Appendix I of this chapter. This program also defines the process for community approval, design, and prioritization for construction.