The placement of curbs can generally be determined from the Streets Dimension Standard Plan (Standards S-470-1). There are other considerations, however, such as clearances between the curb face and the face of an abutment, a pier, a column, or other obstruction. Refer to Section E 322, Clearances.
Curb should be offset 2 feet from edge of through traffic lanes. The 2-foot gutter width as normally constructed may constitute the 2-foot curb offset. In special cases in which the available street width is limited, it is permissible to include the gutter width as part of the usable traffic lane width.
Generally, curb positioning should provide the same unobstructed roadway width at intersections, median openings, and undercrossings or overcrossings. See Section E 556, Types of Intersections.
In setting the alignment for curbs, adequate clearance should be provided to prevent encroachment of the back of curb into private property.
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