Agenda - 08-24-1987 - Laserfiche WebLink

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25 ,-) 3 It is recognized that there are situations where con- flicts cannot be reduced to an acceptable level or design standards cannot be met. In these situations, it is recommended not that driveways be restricted, but that they be denied. Examples of such situations would be inability to provide adequate sight distance or inability to restrict turning movements. When direct access is denied alternatives such as parallel frontage roads are recommended. Otherwise, some type of compensation to the denied property owner may be necessary. The use of alleys to provide driveway access to the rear of the lot is suggested as a preferable alternative to driveway restrictions such as common driveways. Modern subdivision design, however, tends to discourage the use of alleys. Low density residential development, that is 4 or fewer units per acre provide ample lot widths to accommodate buildings, driveways, and carports or garages . It is only in the range of 6 units per acre that lot widths become too narrow to allow all such construction . At such densities, alleys become an attractive alternative . Alleys designed to modern standards are worth consider- ing in conventional subdivisions. However, the trend toward clustered designs, the integration of various housing types in a single development, the pressure for more open space and common areas, and the additional cost and land required by alleys suggest only a limited role for alleys in future residential construction . The design considerations listed above include location and spacing as driveway design elements. These design elements refer to the location of a driveway on the property It serves and spacing between driveways. The recommended minimum spacing for different types of driveways is contained in the following table. Driveway Spacing Minimum Spacing ( ft. ) Residential Commercial industrial From property line 0 From street corner 0 R Between driveways 3 3 10 3 10 R r Driveway radius NOTE: All distances are measured from the points where driveways radii intersect the curb tangent. These spacing recommendations confirm the professional position that proper design is adequate to handle vehicular conflicts. With regard to the Planning Board ' s interest in driveway controls, they suggest that the basis for any such control will be Justified on other than technical specifica- tions.