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N.,/ Mr.Jerry Violett SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS December 8,2003 Page 3 Total Trip Ends. To identify the possible total trip generation for the proposed project we first assumed that the average trip generation rate developed from these observations could be applicable. This would be 680 + 70.8 /2 = 375.4 trips per 1,000 sf. Application of this rate would suggest that a 1,000 sf project might generate 375 peak hour trips. As a practical matter, because the counts,at the two sites were similar, it is more reasonable to suggest that the trip generation associated with these types of uses is not directly dependent on the size of the business. If this is true, we could expect that a drive-up convenience "coffee-oriented" center in an urban setting will likely generate 170 to 204 peak hour trips, regardless of size. This is likely a more reasonable conclusion that 375 peak hour trips. While the projections above could be applicable in urban settings,the proposed project is located in a rural setting along Highway 99. It has been our experience that in the morning most drivers wish to pick up coffee at the beginning of their commute trip. Thus, coffee related businesses on well- traveled&ban streets do well. However,Caltrans counts indicate that only about 1,000 vehicles per day get onto SR 99 at Jahant Road. For this reason the number of trips generated by this business will likely be lower,perhaps in the range of 120 to 150 trips in the Weak hour. Net "New" Trips. To complete the trip generation estimate it is necessary to identify the number of trips that may be "new". It is commonly accepted that a portion of trips made to and from retail uses are made by persons who are already on the road but choose to stop to make a purchase. In the case of the proposed project, "pass-by" trips would be made by patrons who are already driving by the site on SR 99 or Jahant Road, while "new" trips are those made by persons who have gone out of their way to drive to this site. To suggest the percentage of total traffic that may be "new" we first reviewed available data published by the Institute of Transportation Engineers (ITE)'. The most similar land use considered in the ITE handbook is Convenience Market. Data for this use suggests that on average "pass-by" trips represent 63% of the total trips generated by this use with all data falling in the range of 48% to 74%. Based on the proposed project's rural location, we would expect the "pass- by"percentage to be higher than average,with a rate of about 70%applicable to this use. As shown in Table 2,the application of a 70%pass-by"trips factor would suggest that the proposed use may attract 36 to 45 "new"trips to study area street system during the a.m.peak hour. 1 Trip Generation Handbook,An ITE Proposed Recommended Practice,ITE 10/98.