19.06.11 Clear Sight Triangle

1. To allow for clear sight at all intersections sight distance shall be calculated based on AASHTO Geometric Design of Highways and Streets. The graphic in Figures 6.4 and 6.5 below depicts the technique used to determine the driver’s eye location and an approaching vehicle; a line is then drawn to connect these two points. Continuous unobstructed line of sight must be provided along this line and throughout the approach to the intersection, providing an unobstructed sight triangle to the side street driver. Sight distances for vehicles based on right-angle intersections are provided as an example in the graphic, and: a. all landscaping, and fencing shall be limited to a height of not more than three feet, and b. the grade at such intersections shall not be bermed or raised. 2. Exceptions: a. Deciduous tree canopies may be located in the clear sight triangle of privately maintained intersections only if at maturity, as defined in Section 19.06.06, the distance between the ground and base of the canopy is maintained at no less than eight feet and any portion of the tree trunk at maturity that enters the clear sight triangle is no greater than twelve inches in diameter, and b. Clear sight triangle at intersection of private single-family residential driveways and streets shall follow Figure 6.6 c. any other exception outlined in the Code. Figure 6.4 Figure 6.5 Figure 6.6 Ord, 20-28, Ord. 16-20, Ord. 16-09, Ord. 15-29, Ord. 14-23-1, Ord. 13-16, Ord. 12-9, Ord. 11-9)