City traffic engineers reported back to the Bicycle & Pedestrian Advisory Committee on a pilot traffic-calming installation on Spinnaker Point and surrounding streets, saying the temporary measures reduced speeds in aggregate but that more durable treatments and clearer signage are planned.

Staff described the pilot as a rapid-response, low-cost test that used painted traffic circles, cones and channelizers to encourage slower turning and provide pedestrian refuge. Data collected for a week in July measured speeds, volumes and vehicle types. Staff said the 85th percentile speed — a standard traffic engineering benchmark indicating the speed at or below which 85 percent of drivers travel — generally aligned with the 25 mph limit in those samples, but that outlier drivers recorded higher speeds.

Based on community feedback and the data, staff proposed a phase-two installation that replaces temporary cones with rubber curb elements, adds yellow reflectors and improved striping, and widens marked elements for better visibility. Staff also proposed removing most temporary bollards at some locations while retaining them at key corners, and creating a refuge island at Newport to shorten crossing distances.

The Fire Department sought assurances that any durable elements remain mountable and do not impede emergency response; staff said designs will be developed with Fire and Police input to avoid fixed obstacles that could block apparatus. Committee members raised questions about enforcement, nighttime speeding, data collection frequency and how pilot locations are selected. Staff said they are drafting traffic-calming guidelines to create objective criteria for future projects and will present the draft to the traffic committee before wider rollouts.

Staff described the pilot as informative and said some measures, such as the painted circles, reduced problem behaviors like donuts; they recommended limited permanent hardware (rubber curbs and reflectors) as a next step and pledged further monitoring after phase two is installed.