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Committee approves expanded speed and volume data collection at multiple locations
Summary
The Sherwood Traffic Safety Committee agreed to deploy radar trailers and short-term counters to collect speed and traffic-volume data at problem locations including Willamette/Lincoln (to Division), Pinehurst/Woodhaven and other corridors; data will inform targeted treatments and stop-sign/stripe recommendations.
The Sherwood Traffic Safety Committee approved a staff plan to expand traffic data collection after repeatedly hearing resident complaints about speeding on Willamette, Lincoln and other corridors. Staff said they will deploy speed trailers and pneumatic-tube or radar counters in rolling two-week sections at priority locations — starting with Pinehurst and Woodhaven, then moving to sections of Willamette from Willamette/Oregon to Willamette/Division — and leave speed-display trailers in place for at least a month to capture sample speeds and volumes.
Committee members and staff emphasized that vehicle speed and Average Daily Traffic (ADT) data are essential to determine whether engineering or enforcement treatments are warranted. Staff noted technical thresholds used for traffic treatments under national guidance: for example, a frequently-cited ADT threshold (discussed in the meeting) is about 5,000 vehicles per day for some centerline and stripe treatments; staff said the city will collect ADT and speed data to evaluate appropriate countermeasures, including enhanced signage, centerline striping, radar feedback signs, or other toolbox items referenced in the committee’s policy documents.
On the Willamette/Lincoln-to-Division complaint, members described a steep grade where drivers often accelerate downhill and residents report frequent high speeds; staff said slopes and right-of-way geometry make some physical calming measures (like conventional speed cushions) impractical, but radar feedback signage or higher-visibility markings may help. For other locations — Pinehurst and Woodhaven — the committee expects the data to show narrower-collector issues with two-way parking and possible sight-line constraints.
Staff described an implementation schedule: deploy data-collection devices in two-week segments at prioritized locations, use the trailer for at least a month to gather continuous speeds, and return a summarized warrant analysis for stop or signal changes when appropriate. Committee members asked that the data be presented at the next meetings alongside recommended treatments and cost/feasibility information.
Ending: The committee did not adopt specific capital changes at this meeting but authorized staff to collect targeted field data to support future engineering recommendations and enforcement requests. Staff said they will create a regular package of the collected counts and speed data to help the committee respond consistently to recurring resident complaints.
