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Where driveways are to be built across the sidewalk spaces, unless otherwise expressly authorized they shall conform to the sidewalk grade. Such driveways shall be constructed of concrete eight inches in depth and shall otherwise comply with applicable regulations. Provided, however, that in the case of driveways across viaduct sidewalks or existing residential asphalt driveways, variations of construction and materials to conform to existing condition may be made when approved by the commissioner.
No driveway shall be so constructed as to prevent free and unobstructed passage on, over or across the same, or in such a manner as to interfere with the proper drainage and safe grading of the streets. No driveway shall be constructed across intersecting sidewalks. Gradual approaches to the regular sidewalk grade shall be made from the grade of the driveway. The slope of any driveway and the approaches thereto shall not exceed one inch vertical to one foot horizontal nor be less than one-fourth inch vertical to one foot horizontal in any direction, except that the slope from street curb line shall not exceed one inch vertical to one foot horizontal.
(Prior code § 33-20; Amend Coun. J. 5-4-94, p. 49718; Amend Coun. J. 1-14-97, p. 37762, § 35; Amend Coun. J. 6-30-10, p. 95412, § 1)