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Springfield keeps speed cushions on Centennial after pilot cuts speeds; council asks for more data
Summary
City staff told council the Centennial Boulevard temporary speed‑cushion pilot reduced average speeds from 34 to 25 mph and cut traffic volumes on Centennial by roughly 23–25%; council asked staff for more distribution data and agreed to keep the cushions in place while evaluating downstream impacts to nearby local streets.
A Springfield City Council work session on the Centennial Boulevard traffic‑calming pilot ended with council directing staff to keep the temporary speed cushions in place and return with more analysis and a briefing memo.
Transportation planning engineer Michael Liebler told council the before/after study found the corridor’s average speed fell from 34 miles per hour before the pilot to 25 miles per hour after, and the 80th‑percentile speed dropped from about 37 mph to about 30 mph. “In the after condition, after the calming, the average speed was found to be 25 miles per hour with an 80th‑percentile speed of 30 miles per hour,” Liebler said.
Staff also reported shifts in traffic volumes. Liebler said…
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