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Speed Humps. Speed humps (also called undulations) reduce speeds on residential streets by <br /> compelling motorists to slow to residential speed limits when approaching the hump. Speed <br /> humps are 14' to 22' in length and are approximately 3" high. They are most effectively used in <br /> clusters of three to five, and are generally installed at intervals ranging from 200' to 500' apart. <br /> Speed humps are not to be confused with speed bumps. Speed bumps much more abrupt, usually <br /> less than 3' in length, and are used in parking lots and private drives. Speed bumps are not used <br /> on public streets. <br /> • <br /> The 14' speed hump design, when used in a series, will reduce the average vehicle speed to <br /> approximately 25 mph. The 22' design will reduce the average speed to approximately 35 mph. <br /> This hump extends laterally over the width of the roadway sloping to the existing grade within a <br /> foot or two of the gutter. This design allows bicyclists to weave around the hump near the curb <br /> to avoid having to cross the hump. <br /> While primarily used for speed reductions, speed humps can reduce traffic volumes on streets <br /> where they are employed by diverting traffic to other nearby streets as motorists choose alternate <br /> routes to avoid them. <br /> * *INSERT PHOTO ** <br /> f7 <br />