RES 89175 - Laserfiche WebLink

SR 89:133 Page 8 It must be kept in mind that the short-term traffic model which we belive accurately represents North Pleasanton does not include all unbuilt residential development outside North Pleasanton. These projects feed peak hour trips through North Pleasanton, but are not projected. It is a policy issue to decide if current, measured occupancy rates are conservative enough to reflect conditions that will exist in two or more years. The Standard Assumptions require, "All projects shall be assumed to be built-out within approximately two years of the most recent City-wide Traffic Survey. The Traffic Engineer shall calculate levels of service at the build out date..." Will "build-out" be 100% or 90% occupancy? Such a policy issue must weigh the likelihood of "Maximum build out" versus most likely to occur and the possible impact of trips from land use changes not included in the model. The A.M. rates would be selected to match the assumptions used in the selected P.M. rate. Commercial Pass-By Reduction By error, the reduction in commercial trips normally made to avoid double counting trips was deleted in 1988. Prior to 1988, a 50% reduction was assumed. For short-term traffic studies, staff recommends reinstituting a "pass-by" reduction based on the ITE- recommended rates. See the attached figure. Most North Pleasanton commercial projects would utilize a 40% reduction. Impact of Recommended chanqes Adoption of the various options will lessen the amount of additional traffic that is projected to use existing or approved streets as compared to the current, adopted 2.0 trips per 1,000 sq. ft. of office space and 100% occupancy. It will make the difference between some intersections exceeding the v/c ratio of 0.90 when considering the "1988 Existing + Approved" traffic volumes. No new projects could then be approved until the Hacienda and Santa Rita 1-580 interchange projects were under construction and included in the transportation model. A reduction to 1.65 trips per 1,000 sq. ft. would change the projected v/c ratio in the range of 0.02. A reduction in projected occupancy rate from 100% to 95% or from 100% to 90% and the proposed "Pass By" correction would result in a further reduction of about 0.01 or 0.02 respectively.