Laserfiche WebLink
Transportation Engineering NorthWest May 11, 2006 <br />Page 3 of 3 <br /> <br />Transportation Engineering/Operations ♦ Impact Studies ♦ Design Services ♦ Transportation Planning/Forecasting <br /> <br />816 6th Street South ♦ Kirkland, WA. 98033 ♦ Office (206) 361-7333 ♦ Fax (425) 889-TENW (8369) <br />proposed accesses on Huntzinger Road, a right-turn pocket/taper/ or lane would still not <br />be recommended based on WSDOT standards. <br />Left-Turn Lanes on Huntzinger Road <br />The need for left-turn lanes on Huntzinger Road were assessed based on WSDOT <br />Design Manual figure 910-8a (see Appendix B). The estimated number of Saturday <br />peak hour southbound left-turns on Huntzinger Road entering the site is 79 vehicles <br />(90% of 88 entering trips). Based on figure 910-8a and a 50 mph posted speed, a <br />minimum of 350 peak hour thru vehicles (total of both directions) would be needed on <br />Huntzinger Road before a left-turn lane would be needed for capacity (350 thru vehicles <br />equates to a total design hour volume (DHV) of 438 vehicles: 350 thru + 79 southbound <br />lefts+ 9 northbound rights). Based on the estimated 2012 ADT on Huntzinger Road of <br />538 vehicles, it is unlikely that approximately 2/3 of the ADT would occur during the peak <br />hour of the proposed development. Therefore, a left-turn lane on Huntzinger Road <br />would not be recommended based on WSDOT guidelines. <br />Operations of Proposed Access <br />The operations of the proposed access on Huntzinger Road including level of service <br />(LOS) and queuing are not expected to be an issue. This assessment is based on the <br />2012 projected ADT of 538 vehicles on Huntzinger Road. Using a K factor (proportion of <br />daily traffic occurring in the analysis hour) of 0.10, the estimated peak hour volume on <br />Huntzinger Road would be approximately 50 vehicles. With a peak hour volume of 50 <br />vehicles on Huntzinger Road, we would not expect LOS or queuing to be an issue with <br />the additional traffic from the proposed Vantage Point development. <br />Summary/Conclusion <br />Based on the analysis included in this memorandum, the greatest number of peak hour <br />trips is estimated to occur on a Saturday. During the peak hour of the generator on a <br />Saturday, the Vantage Point development is estimated to generate 173 peak hour trips <br />(88 entering, 85 exiting). Based on guidelines included in the WSDOT Design Manual, <br />turn lanes would not be recommended on Huntzinger Road along the project frontage. <br />The operations of the proposed access on Huntzinger Road including LOS and queuing <br />are not expected to be an issue. <br />If you have any questions regarding the information presented in this memorandum, <br />please contact me at 206-714-7421. <br /> <br />cc: Skip Coddington <br /> Todd Lolkus, PLS, Todd Lolkus Land Surveying <br /> Jeff Haynie, P.E., Principal - TENW <br /> <br />Index #5