The street structural section shall be determined from "R" values obtained from material gathered from the level of the proposed subgrade using the State of California Division of Highways design method. In no case shall the minimum street section be less than 3 inches asphalt concrete and 4 inches of aggregate base. The aggregate base section may be comprised of an equivalent section of aggregate base and aggregate subbase, but in no case shall the aggregate base be less than 4 inches. If deep lift asphalt is used the minimum section shall be 7 inches of A.C. (see Figure IV-1, page IV - 3).

Arc length on centerline of horizontal curve shall not be less than 100 feet unless the centerline radius is greater than 3,000 feet. At an intersection, only that portion of the curve outside curb returns can be used to satisfy this requirement.

In hillside terrain, or if other design constraints are present, curve radii may be reduced (with corresponding super elevation) in conformance with the L.A. County Highway Design Manual, and shall be subject to the approval of the City Engineer.

If a highway changes classification and width at an intersection the typical section of the higher classification shall be carried through the intersection and then transition back to the lower classification. This transition is normally 600 feet and is subject to the approval of the City Traffic Engineer prior to approval of the improvement plans.

Corner cut-offs are required at all highway intersections, including intersections with local streets. Local-to-local street intersections also require corner cutoffs. (see City of Palmdale Std. No. C-7 series)

Adjacent intersections along the highway, but on opposite sides and offset in a direction in which left turns will not be in conflict, should be spaced a minimum of 150 feet centerline to centerline.