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Post‑hump data show modest speed and volume increases on Tanyard Springs; corridor still fails traffic‑calming threshold
Summary
Follow‑up counts after removal of speed humps on Tanyard Springs showed modest increases (roughly 60–100 vehicles per day in sections and a rise in 85th‑percentile speeds from about 24 to 26.5 mph); staff said the corridor still does not meet the neighborhood traffic‑calming program threshold.
Staff reported follow‑up traffic counts on Tanyard Springs after removal of speed humps last year. The middle section showed an average increase of about 100 vehicles per day; another section increased by roughly 60 vehicles per day. The 85th‑percentile speeds rose from roughly 24 mph in October to about 26.5 mph in the spring in one monitored location.
Traffic staff said the corridor’s scoring still falls short of the neighborhood traffic‑calming program threshold (7 points) and that average daily volumes would need to approach about 1,000 vehicles per day for that segment to qualify under program criteria. One counter at the southern location malfunctioned in the spring sampling, and staff will recollect data there to verify the full corridor results.
Staff concluded that while removal of speed humps produced some measurable changes, the increases were insufficient to requalify the corridor for the traffic‑calming program. The committee accepted the report and will revisit the item if further data from the southern segment indicate higher volumes or speeds.
