Sidewalks shall be installed in locations determined by the approving authority to be in the interest of public safety considering the probable volume of pedestrian traffic, the adjoining street classification, school bus stops, the development's location in relation to other populated areas and the general type of improvement intended. Where required, sidewalks should be at least four feet wide and located as approved by the approving authority. Sidewalks shall be placed upon a compacted subgrade overlaid with at least four inches of porous material such as sand or gravel. Concrete sidewalks shall be at least four inches thick, except at points of vehicular crossing where they shall be at least six inches thick, of Class B concrete having a twenty-eight-day compressive strength of 4,000 pounds per square inch, and shall be air-entrained. Blacktop or sidewalks of other approved materials shall be constructed as approved by the approving authority upon the advice of the Borough Engineer. Where sidewalks cross curbs, curb ramps shall be provided as outlined in § 165-67, Curbs. Preformed expansion joint material shall be placed at twenty-foot maximum intervals where sidewalks abut curbing or a structure.
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