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Ms. Michclotti asked if traffic calming projects would continue to be used throughout the city. Mr. van Gelder believed that was an important question to address. The greatest cost is paving, not just traffic calming devices. Staff has done a demonstration project, but has not yet brought back the results to Council. Design guidelines do not specify scientific criteria m measure results. He felt the success of a neighborhood traffic calming project is in the perception of the neighborhood residents. He believed 90% of traffic calming projects do not accomplish anything from a scientific standpoint; however, it gives the people a feeling that something was done to make the neighborhood safer. They usually only reduce speeds by a mile or two. Bill McKee, 1075 Crellin Road, also supported speed bumps. lie felt a lot of money would be spent on the traffic calming devices and nothing would be accomplished. He referred to traffic situations in Milpitas where right turns were limited at certain times of the day. He suggested prohibiting left turns from Vineyard during peak commute hours. Diane Pitts, 3028 Crestablanca, expressed her appreciation for the efforts and cooperation of the traffic engineering staff. Her main concern was speeding on Crestablanca and the difficulty the residents have backing out of their driveways. She did not want to keep traffic off Crestablanca, she just wanted to slow it down. She did not favor the choker method because it forces traffic to the middle of the road and she felt visibility ~vas limited by the crest of the hill. She was concerned about head-on collisions. She also expressed concerns about the look of the medians, whether landscaped or not; some residents favored landscaping because it ~vould be prettier and some did not wm~t landscaping because of coanems about maintenance. She would really prefer a speed hump at the crest of Crestablanca. Mayor Tarvet asked staff why speed humps had been eliminated as an option. Mr. van Gelder explained the humps were not favored tbr a variety of reasons. It would slow down the response time of fire tracks and emergency medical vehicles. In addition, concern was expressed about pain caused by jostling patients in ambulances. Them could also be legal problems caused by vehicles hitting the humps too fast and going out of control. Steve Bmzosky, 1700 Vineyard Avenue, believed that the traffic calming proposal was addressing symptoms and not solving the cause of the problem. He felt removing the stop sign at Montevino would solve the backup problem on Vineyard. He believed most of the evening co~nmute traffic ends at Concannon Drive in Livermore. When Isabel is extended to 580, the problem will only get worse. When there is a problem on Pigeon Pass or Stanley Boulevard, there are police officers waiting to ticket people who U'y to go around on E1 Capitan. He felt the police should control the backed up traffic at the intersection instead. Hc felt this problem goes beyond mitigating impacts Pleasa~xton City Council 19 07/11/00 Minutes