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Council hears proposed vehicle-noise ordinance setting decibel thresholds; staff to revise motorcycle definition
Summary
Staff introduced Ordinance 01-26 to add objective decibel thresholds for amplified speakers and engine noise (80 dB for speakers; 86 dB for ≤35 mph roads; 90 dB for higher-speed roads), add an engine-brake restriction, and create a public-nuisance subsection; staff will revise the motor-vehicle definition to include motorcycles and return for a Feb. 9 second reading.
City staff presented Ordinance 01-26 on Jan. 20, proposing amendments to Dublin’s codified ordinances to address vehicular and environmental noise by adding measurable thresholds, an engine-brake restriction and a public-nuisance provision.
Jeanne Willis, the staff presenter, summarized the proposal: a proposed 80-decibel threshold for motor-vehicle speaker or amplifier noise and duration-based rules (an 80 dB threshold with a 15‑minute duration for disorderly conduct and public nuisance), plus speed-based thresholds for engine noise — 86 decibels where posted speeds are 35 mph or below and 90 decibels for higher-speed roadways. "The changes aim to establish clear, measurable standards, enhance the city's ability to respond to community noise concerns, and objectively evaluate disturbances," Willis said.
Council members raised questions about whether the proposal covers motorcycles, how the city will demonstrate "pervasive" lower-decibel noise, benchmarking with neighboring jurisdictions and how enforcement devices will be tested. Willis acknowledged an oversight in the motor-vehicle definition that excluded motorcycles and said staff will revise that definition for second reading. She also cited using Federal Highway Administration (FHWA) criteria to set thresholds for heavy trucks; staff indicated typical readings for a properly maintained dump truck are about 89 decibels.
Several council members emphasized the need for testing and community education before enforcement begins and requested benchmarking data from nearby jurisdictions. Council also asked staff to explain enforcement options and the proposed timeline: staff recommended adoption at second reading and public hearing on Feb. 9.
What’s next: Staff will return with a revised draft that clarifies motorcycle inclusion, provides benchmarking information and outlines enforcement/testing plans ahead of the Feb. 9 public hearing.
