pages: TransportationCommission/2012-09-26.pdf, 3
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TransportationCommission | 2012-09-26 | 3 | is well thought out and impressive. Commissioner Wong asked about the triangle potion near the 7-11 convenience store and Nikko's Cafe where the signal light would be. She wanted to know how the traffic signal would impact vehicles driving over the Park Street Bridge and specifically traffic feeding into 29th Avenue to the roundabout and around the Park Street Bridge. Garrett Gritz said the existing conditions at Ford Street is a stop sign. This movement would not allow vehicles to turn left here. Also, under the proposal, this intersection would be signalized and would have crosswalks and pedestrian signal phases. Moreover, there would be durations where vehicles coming off the bridge would want to turn left that currently have a free movement that would get a red light and stop. He noted that the most challenging part of the intersection is the pedestrian movement, which ends up taking up a lot of time. To combat the problem, they would implement a refuge area, which would allow the green time to be reduced for the pedestrian crossing. Commissioner Wong asked about the type of signals proposed on 29th Avenue. She mentioned that in terms of the bridge being up and potential traffic exiting on 29th Avenue versus 23rd Avenue what is the potential backup and study of the back up. Garrett Gritz explained that all of the signals on the 23rd Avenue corridor are interconnected and equipped with wiring to allow AC Transit to be able to have the capability when the technology comes to trigger the lights with signal actuation. He mentioned that AC Transit does not have enough resources to equip all AC Transit buses with that technology and AC Transit is in the process of eventually receiving green prioritization. Additionally, they are coordinating with Alameda Public Works on the rail project, which was one of the mitigation measures. They also plan to have communications under the Estuary between Alameda and Oakland. Commissioner Wong asked about the Ford Street and 29th Avenue intersection and what studies were conducted on Alameda's side. She inquired about the study because occasionally when the bridge goes down and depending on the time of day vehicles driving over the Park Street Bridge could wait up to 15 minutes because it is backed up to Central Avenue. She wondered whether the signal timing could be extended on the Alameda side so vehicles could get on the on-ramp SB I-880 without having to wait. Garrett Gritz replied that the signalization at Ford Street and 29th Avenue would not impact that condition because when the bridge goes up the vehicles cannot come through there. So, the intersection would not be impacted. Thus, it is more about when the bridge comes down and when vehicles are approaching I-880. Commissioner Wong replied that she was referring to after the bridge goes down and the potential traffic impact. Garrett Gritz explained that when the intersection becomes signalized there will be an increase delay regardless of whether bridge is up or not. Page 3 of 10 | TransportationCommission/2012-09-26.pdf |