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Mark Pfeifer <br />WALKER May 1, 2009 <br />PA~tK~NG CtiRhaSv'CfAf`+~~~ <br />Page 4 <br />METHODOLOGY <br />The flow chart below describes the logical progression of a shared parking analysis. <br />Figure 1 : Shared Parking Methodology <br />Standard Parking. Adjust for Captive Ratios (Site Specific Rados) x <br />Generation Ratios and Mode SpEit =Site- {Area of Each Use) = <br />{SpacesMt)(l0 sf Gt_A of Speafic Ratio Design Partcing Demand, . <br />Each Use) far Each Use <br />Separate into Visitor and <br />Employee Components <br />~ Determine Design <br />Adjust for Month, Day of Calculate Accumulation of Daysffimes/ <br />Week and Time of Day Parked Cars on Typical Months for Employees <br />Days. in Each Month and Visitors <br />Compare to Parking Recommended Parking <br />Availability on Site and in Plan <br />Area <br />Source: Adapted from Transportation Planning Handbook, ITE, 1999 <br />The ability to share parking spaces is the result of two conditions: <br />• Variations in the accumulation of vehicles by hour, day or season, at the individual land <br />uses. <br />• Relationships among the land uses that result in patrons visiting multiple land uses on the <br />same automobile trip. <br />For example, shared parking assumes some percentage of patrons at one business (restaurant) <br />may be employees of another business (office) located in the same development. This is referred <br />to as the "effects of a captive market," as some of the restaurant's patrons are already parking at <br />the site to work; therefore, contribute only once to the number of peak hour porkers utilizing the <br />development's parking supply. In other words, with shared parking, the parking demand ratio for <br />individual land uses can be factored downward in proportion to the captive market support of the <br />neighboring land uses. <br />75B-254 <br />