Petition for Speed Bumps - Seattle City Rules

Transportation Washington 3 Minutes Read ยท published February 07, 2026 Flag of Washington

Seattle, Washington residents who want local speed bumps or other traffic calming measures can petition the city through Seattle Department of Transportation programs. This guide explains who is responsible, how petitions are evaluated, what evidence or signatures are typically required, and how to apply or appeal decisions. It summarizes official program pages and where to find request forms and contact channels so neighborhood groups can start a traffic-calming project in Seattle.

How the city evaluates requests

The Seattle Department of Transportation (SDOT) manages neighborhood traffic control and speed hump programs and evaluates petitions based on traffic speed, collision history, and neighborhood support. See the city program overview and eligibility criteria for details on thresholds and studies required; start your petition by reviewing the official program page Seattle Neighborhood Traffic Control program[1].

Neighborhood support and measured speed/count data are the most influential factors.

Typical petition steps and evidence

  • Collect baseline data: speed studies and traffic counts, often performed or validated by SDOT.
  • Community petition: gather signatures from affected block faces or a defined percentage of residents as stated by SDOT guidance.
  • Document collisions and safety concerns with dates and locations to support the request.
  • Site visit and engineering study: SDOT inspects and may perform an engineering evaluation before any installation.
Early contact with SDOT speeds up technical review and clarifies signature thresholds.

Applications & Forms

SDOT publishes guidance and the specific request process for speed humps and other traffic calming measures; the city speed-hump page lists technical criteria and how to submit requests, including any online form or email address for initial petitions Seattle speed humps and traffic calming[2].

If you cannot find a fillable form, submit a written petition and supporting data to the address or contact listed on the SDOT project page; fee information is not always published and may be not specified on the cited page.

Penalties & Enforcement

Traffic calming installations themselves are implemented and maintained by SDOT; enforcement of traffic rules and violations (speeding, obstruction) is typically handled by Seattle Police Department and by traffic enforcement processes defined in city code. Specific fine amounts for violations related to traffic calming installations or illegal alteration of installed devices are not specified on the cited SDOT project pages. For enforcement contacts or to report tampering or urgent safety problems, contact SDOT or Seattle Police as listed on official contact pages Seattle Department of Transportation contact[3].

  • Fine amounts: not specified on the cited page.
  • Escalation (repeat/continuing offences): not specified on the cited page.
  • Non-monetary actions: SDOT may require removal or correction; enforcement action for illegal work may involve citations or court referral (details not specified on the cited page).
  • Enforcers and complaints: SDOT and Seattle Police Department handle site issues and public-safety complaints; use official SDOT contact channels to report urgent hazards.
If someone tampers with a city-installed device, report it immediately to SDOT or SPD.

Applications & Forms

Official SDOT pages list whether a specific application or petition form is required; if a published form exists it will be linked on the speed-humps or NTCP pages. If no form is published, submit the petition package by email or mail as directed on the program page. Fee details are often not published on program pages, in which case they are not specified on the cited page.

How-To

  1. Review the SDOT Neighborhood Traffic Control and speed-hump guidance to confirm eligibility and signature thresholds.
  2. Collect data: request or record speed and volume counts and gather collision history for the block(s).
  3. Organize neighbors and collect signatures according to SDOT instructions; include contact information for petition leads.
  4. Submit the petition and supporting materials to SDOT via the method shown on the official program page.
  5. Attend any community meetings or field reviews SDOT schedules; respond to requests for additional information.
  6. If SDOT denies the request, ask about appeal or review procedures and timelines; follow the department directions for reconsideration.

FAQ

How long does the petition process take?
Timelines vary by workload and study requirements; SDOT project pages provide typical review steps but specific durations are not guaranteed.
Do I need a certain number of signatures?
Yes, SDOT guidance sets neighborhood-signature requirements for many traffic calming measures; consult the program page for the current threshold.
Will SDOT pay for installation?
SDOT funds standard installations, but some projects may be subject to prioritization or auxiliary costs; check program guidance and ask SDOT for specifics.

Key Takeaways

  • Start by reviewing SDOT program pages to confirm eligibility and required evidence.
  • Collect speed data and neighborhood signatures before formal submission.
  • Use official SDOT contact channels to report hazards or ask procedural questions.

Help and Support / Resources

  1. [1] Seattle Neighborhood Traffic Control program
  2. [2] Seattle speed humps and traffic calming
  3. [3] Seattle Department of Transportation - Contact

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