Article 8.9 - Clear Sight Triangle at Intersection

.1 A clear view at each corner of an intersection of public or private streets or driveways shall be maintained by establishing a “sight triangle” that is free of obstructions that may block a driver’s view. The extent of the required sight triangle varies according to the posted speed and traffic control device(s)  of the streets forming the intersection.  Below is a general figure from the American Association of State Highways and Transportation Officials (AASHTO) “A Policy on Geometric Design of Highways and Streets” which depicts the required sight triangle area to be free of obstructions at an intersection. Measurements for sight distances at street intersections, including sight triangles, shall begin within the roadway or edge of pavement of a proposed or existing street. Additional information on the required site triangles can be found in the Town’s Engineering Standards and Procedures Manual.

art 8

A sight triangle easement may need to be recorded on the property plat if the sight triangle does not fall completely within the recorded right-of-way. Should the sight triangle cross private property, the developer shall secure permanent sight triangle easement or right-of-way from all private property owners within the sight triangle prior to preliminary/construction plan approval.

Sight Triangles

.2 No planting, structure, sign, fence, wall, man-made berm, or other obstruction to vision shall be installed, constructed, set out, or maintained so as to obstruct cross-visibility in the sight triangle between 30 inches and 96 inches above the level of the center of the street intersection.

.3 The limitations of this section may be modified in the instances noted below, so long as adequate visibility is maintained relative to intended speed limit:

(a) trees trimmed such that no limbs or foliage extend into the area between 30 and 96 inches above the level of the adjacent intersection. Required street trees in the green zone shall not create a walling effect within a sight triangle;

(b) fire hydrants, public utility poles, street markers, government signs, electrical junction boxes (below 30 inches in height), and traffic control devices;

(c) buildings located in the Town Center District, the Neighborhood Center District, or the commercial centers of either TND District;

(d) the approved and intentional use of traffic calming techniques to reduce speed; these include, but are not limited to: a series of hill crests, neckdowns, intersection diverters, and curb bulbs.

.4 Corner easements refer to the Huntersville Engineering Standards and Procedures Manual (ESAPM).

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