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. of traffic may be cutting through his neighborhood. With the expansion of Stoneridge mall, more vehicles would be taking this route. He suggested that traffic-calming devices be installed on Muirwood Drive North and Springdale Avenue prior to approval of additional square footage at Stoneridge mall to alleviate existing cut-through traffic caused by unmitigated effects of previous developments. Chair Barker asked Mr. Gill if his street is included in any of the traffic-calming activities the City is working on at this time. Mr. Gill said no. Matt Sullivan, 4324 Muirwood Drive, also a member of the West Las Positas Committee but speaking as a private citizen, concurred with Mr. Gill regarding cut-through traffic on Muirwood Drive/Springdale Avenue and the need for traffic-calming devices on those streets. The problem with analyzing traffic in connection with an individual application is that it does not take into account the cumulative effects of all the developments in the area, which would impact the entire City. When developments are approved beyond what is already in the General Plan and the West Las Positas interchange is not built, traffic in the City can only get worse. He supported Condition Lb. which would revoke the approval of the expansion in the event that the West Las Positas interchange is not constructed and future traffic is not satisfactorily mitigated. He agreed with Commissioner Cooper and questioned the benefits the City would have by vesting this much development at this time. He concluded that increasing traffic ultimately adds up to negative effects on the quality of life. . Mr. Gibson stated that Mr. Pretzel's recommendation that vehicles coming from 1-580 be channeled to enter the mall through the second intersection rather than through Canyon Way was an operational and safety improvement. He apologized for a mistake in the base condition for the traffic report regarding impact on the Bernal interchange and indicated that the number should be 77 - instead of 70 - to 78, thereby confirming the 1 % traffic impact increase resulting from the additional nine trips. With respect to cut-through traffic on Muirwood Drive/Springdale Avenue, he reiterated that Taubman would pay its fair share of whatever traffic-calming measures are required to mitigate traffic impacts caused by the Stoneridge Shopping Center. With respect to cumulative impacts, he stated that the traffic analyses represent the most conservative set of cumulative impacts as any other in the State. Ms. Williams then explained that the current vested 178,000 square feet would be utilized for an additional 150,OOO-square foot department store, and the remainder would be specialty stores. Mr. Gill stated that the objective of the West Las Positas Committee is to look for alternatives to the interchange and does not specifically include looking at mitigation measures for Muirwood Drive. He proposed that this be incorporated as a condition for approval of the Stoneridge expansion project. PUBLIC HEARING WAS CLOSED Commissioner Kumaran stated that the Stoneridge mall is a good development in a good area; however, with the existing traffic congestion in the area - and possibly without the West Las Positas interchange and with the mall expansion - any minimal traffic impact is undesirable, even if these are mere changes from LOS B to LOS C. He also questioned the revision of the parking ratio from . Planning Commission Minutes Page 11 July 23, 1997