§ 14.06.160. Road construction standards—Alignment.

A.

Vertical alignment. Roads shall be constructed in a manner such that grades shall not exceed, at any point, six percent on arterial roads and ten percent on all other roads, and no more than four percent within 100 feet of any intersection.

B.

Horizontal alignment. Horizontal alignment shall meet the requirements of KPB 20.30.130, 20.30.140, and 20.30.150. Roads shall be constructed along the centerline of the right-of-way and shall have curves meeting the minimum radius requirements of not less than 300 feet for rights-of-way 100 feet in width or more, and not less than 200 feet on all other roads.

C.

Clear zone. There shall be a roadside clear of hazardous objects or conditions for a distance consistent with the speed, traffic volume, and geometric conditions of the site. Roads shall be constructed with a minimum clear zone of 6.5 feet. Where hazardous physical features exist which cannot be located outside the clear zone, alternative treatments such as guardrails may be required.

D.

Turnarounds. Roads designed to have one end closed, either permanently or temporarily, shall be constructed with a suitable turnaround with a minimum radius of 30 feet. Dedicated cul-de-sacs shall be constructed with a minimum radius of 35 feet. The turnaround shall be constructed to a four percent grade or less.

E.

Intersections. Road intersections shall be constructed as nearly at right angles as possible. A minimum unobstructed sight distance of 150 feet shall be provided unless a finding is made by the RSA board, prior to construction, that a lesser distance is appropriate due to topography, traffic flow, or other physical characteristics. Appropriate warning signs may be required by the RSA board if an exception to sight distance is granted. Road intersections shall be constructed with a minimum return radius of 20 feet. Where acute intersections are provided, return radii shall be increased appropriately.

F.

Driveways. Driveways shall be spaced as far apart from other driveways and intersections as practical to avoid interference with ditch drainage.

( Ord. No. 2014-02, § 2, 2-11-14 ; Ord. No. 2008-05(S), § 1, 5-6-08)