Traffic model shows tradeoffs on Garvey: some intersections worsen but signal timing can help, consultants say

Consultants told the council they modeled 43 signalized intersections and used May 2025 turning‑movement counts to test peak‑hour bus‑lane scenarios. They said most intersections would maintain acceptable levels of service with signal timing changes, but identified two intersections — Garvey at Del Mar and Garvey at San Gabriel Boulevard — that showed reduced performance and would need further mitigation.

Maya Boucher said the traffic study found increases in delay in most scenarios but noted that the AM result for Garvey and Del Mar showed a reduction in delay, which the team attributed to retiming opportunities. The team emphasized that right turning vehicles would still be able to access the bus/bike lane for pocket turns — a configuration intended to preserve some turning capacity and reduce queueing.

Council members repeatedly asked whether parallel corridors (Hellman, Graves) were included in the analysis; presenters said those specific parallel corridor analyses had not yet been completed and would be part of subsequent engineering and signal‑timing work. Councilmembers asked staff to prioritize signal synchronization funding and to study spillover effects on neighborhood streets as a condition of any agreement to proceed.

Provenance: topicintro SEG 681; topfinish SEG 1399.