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Traffic study: Tanyard Springs 85th-percentile speeds stayed about 23''4 mph after speed-hump removal; staff will re-test in March
Summary
Public Works told the board that after removing speed humps in Tanyard Springs, seven-day counts in October showed 85th-percentile speeds around 23''4 mph and lower volumes; staff recommended waiting about six months and re-checking speeds before considering reinstalling humps.
Public Works staff presented a traffic-calming report for Tanyard Springs and recommended a six-month re-evaluation rather than immediately reinstalling speed humps.
Mr. Bolden, who led the technical presentation, said crews removed long-standing speed humps and then collected seven-day traffic counts in October at three corridor points. He reported that 85th-percentile speeds remained in the low-20s: "the 85th percentile speed throughout that Tanyard Springs segment stayed down around 23 to 24 miles per hour," he said. Volumes were lower than expected, which staff suspect may reflect driver avoidance of the corridor while speed humps remained in place for years.
Staff explained their method: counts were bi-directional, taken at three locations (southern, middle and northern segments), and collected with small, unobtrusive camera counters rather than rubber hose counters. Mr. Bolden said the southern segment averaged roughly 860 bi-directional vehicles on a seven-day sample and that the highest daily 85th-percentile observed at a site was 24.3 mph.
Board members and commissioners asked whether the public would notice enforcement activity; staff said the counters are often hard to see and that they have received occasional calls about being "spied on." Commissioners also discussed HOA preferences; staff said they had contacted the measurement company and would bring the matter back to the board with updated counts around March, when school is in session and traffic patterns may change.
The practical result: staff do not plan to reinstall the speed humps immediately and will revisit data and community feedback ahead of summer, with the aim of recommending next steps to the board before school lets out.
