The initial trip generation factor will based on type of use categories as defined by the Institute of Transportation Engineers Trip Generation Manual, 9th Edition. The City has categorized the trip index factors into 21 main categories. The categories combines similar businesses and assigns the lowest trip factor of the businesses in that category.
A trip factors, as defined by the Institute of Transportation Engineers Trip Generation Manual, 9th Edition, represents the number of trips anticipated to and from a property per its land use and established units. Based on the trip rate, The City groups businesses into tiers (rate categories). For each non-residential property, except lodging, schools, and outdoor recreation, the building area, in square foot, on the property will be multiplied by the appropriate trip factor from the trip factor index in to arrive at a monthly base trip rate. Properties fitting in the lodging, school, and outdoor recreation categories will calculate the monthly base trip rate of the property by multiplying the appropriate trip factor by the quantity of the unit specified in the trip factor index. The monthly base trip rate value will determine which tier the nonresidential property is classified. For each non-residential customer, the building area on the property will be multiplied by the appropriate trip generation rate (as determined by the zoning) to arrive at a value. This value will be compared to ranges that define whether the customer is Tier 1, 2, 3, 4, 5 or 6.