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TJIQIA
<br />Traniport~tion
<br />Consuhams
<br />The growth in trips using the interchange from the four quadrants of the interchange is equal to
<br />"Project Trips Using Interchange" in 2030 less "Project Trips Using Interchange" in 2005 and also
<br />less the "Trips to/from ICI and Kaiser" in 2030. The result is 1,310 new trips to and from the
<br />interchange in 2030 not including trips related to the two known projects. Fees for the trips using
<br />the interchange from these two projects have already been negotiated through the CEQA process
<br />(California Environmental Quality Act). The total of all new trips by 2030 to and from the
<br />interchange, including through trips is 6,298 in Table III. The proportion of this growth attributable
<br />to the four quadrants by the interchange is 1,310/6,298, or 0.208, or 20.8 percent. Therefore, 20.8
<br />percent of the new trips generated by future development in these quadrants will use the
<br />interchange.
<br />The two major known development projects in the southwest quadrant, ICI Retail and Kaiser
<br />Permanente Hospital, are expected to contribute to a major proportion of total growth in traffic at
<br />the interchange. Table III shows the growth in trips at the interchange due to these two projects.
<br />Table IV shows that these two projects alone are estimated to contribute 54 percent of all growth
<br />in trips at the interchange from 2005 to 2030. The current site for these two projects has been
<br />vacant for several years, hence the few existing trips tabulated in Table III.
<br />Table IV: ICI and Kaiser Permanente Hospital Trips Using Interchange in 2030
<br />Development
<br />Project Daily Trips A.M. + P.M.
<br />Peak Trips Trigs Using
<br />Interchange Percent Total
<br />Interchonge Trips
<br />ICI (Retail Center) 18,298 2,155 1,398 20%
<br />Kaiser Hospital (KP) 34,272 4,759 2,334 34%
<br />Total ICI + Kaiser 52,570 6,914 3,732 54%
<br />Less I_xisting Trips 100 20 20
<br />Net Increase (Growth) 52,470 6,894 3,712 54%
<br />Note: from Table III, there is an increase of 6,890 trips using the interchange. The percentage of the growth is
<br />calculated by dividing ICI and Kaiser trips using the interchange by 6,890, or 1,398/6,890 = 0.203, or 20%
<br />(rounded), and so on.
<br />Estimated Cost per Interchange Trip
<br />Using the 14,814 total interchange trips in the a.m. and p.m. peak hours, and an interchange
<br />improvement cost of $27,000,000, the cost per trip is $1,823 in 2008 dollars. The next step in the
<br />analysis is to calculate the relative financial responsibility by land use categories based upon the
<br />standard reference, Trip Generation, 8~ Edition published by the Institute of Transportation
<br />Engineers.
<br />Conversion of Unit Cost/Trip to Generalized Land Use Categories
<br />Excluding the Kaiser Hospital and ICI Retail projects, an additional 1,310 trips from development
<br />projects in the impact area (Quadrants I - 4) are expected to use the interchange. However, many
<br />other trips from these projects will not use the interchange. The total number of in a.m. plus p.m.
<br />peak hour trips from development projects in the impact area is 6,298 from Table III. The impact fee
<br />per trips in the impact area is calculated by factoring the per trip cost of $ I ,823 by the proportion of
<br />trips from projects in the impact area expected to use the interchange (1,310/6,298 or 0.208) _
<br />$379.18 per project trip in the impact area.
<br />The resulting fee calculation in Table V on the next page is straightforward showing that trip
<br />generation rates for a.m. and p.m. peak hours are totaled to derive the contribution in development-
<br />Page 10
<br />Final Report - Trat~c Impact Fee Analysis for 1-880/Marina Interchange Improvement November 12, 2009
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