Traffic Calming

Traffic Calming Program

Residential collector streets only. Tier 2 improvements are 100% City-funded — no cost to residents.

Traffic Calming — Eligibility Criteria

All of the following must be met:

Speed85th percentile speed is 8+ mph over the posted limit
Volume500+ vehicles per day (ADT)
Segment length800 ft or more
Lane count2 lanes or fewer
Street typeMust be on the City's identified residential collector list
Residential collector streets only. The Traffic Calming program applies only to the 19 identified residential collector streets listed on the Overview page. Collector streets are NOT eligible for speed humps. Tier 2 improvements are 100% City-funded.
Two-Tier Implementation

Tier 1 — Non-Construction Measures

Implemented first. Evaluated over a minimum 6-month period. May include:

  • Speed feedback signs
  • Pavement markings and signage enhancements
  • Enforcement coordination
  • Other low-cost measures

If Tier 1 is found ineffective after 6 months — confirmed by a second City study — the project may advance to Tier 2.

Tier 2 — Construction Measures

Requires a 2/3 resident vote and Board of Commissioners approval. 100% City-funded. Available strategies:

  • Medians or median islands
  • Traffic circles / roundabouts
  • Curb extensions / bulb-outs
  • Chicanes
  • Speed tables (min. 2; 300–600 ft apart)
  • Textured pavements
  • Other (City Commission approval required)
Multi-Way Stop Requests

Multi-way stop requests are evaluated separately under engineering warrants — they are not part of the Traffic Calming or Speed Hump petition process.

Arterial & Commercial Intersections

Must meet one MUTCD warrant:

Accidents5+ accidents in 12 months susceptible to correction by multi-way stop
Volume500+ vehicles/hour for 8+ hours on the major street
InterimApproved pending traffic signal installation
Residential Intersections

Must meet one of the following:

Sight distanceLess than 180 ft in any direction
Accidents3+ accidents in 12 months
Volume / geometry6 of 7 specified conditions met

Existing multi-way stops as of 02/09/2026 are grandfathered and may only be removed by Board of Commissioners action.

Step-by-Step Process
  1. 1
    HOA Prerequisite. If an HOA exists, it must submit the request first. If the HOA denies or takes no action within 90 days, a resident may submit directly. Attach documentation.
  2. 2
    Submit Form TC-A — Initial Study Request. Collect support from more than 50% of homes within 600 ft. Submit to Engineering. An HOA letter of support may substitute for individual signatures.
  3. 3
    First City Study. Engineering evaluates eligibility (speed, volume, segment length, street classification). If warranted, Tier 1 strategies are recommended and implemented. You will be notified of the outcome.
  4. 4
    Tier 1 Implementation & 6-Month Evaluation. Tier 1 measures are put in place and monitored. Engineering evaluates effectiveness after a minimum of 6 months.
  5. 5
    Second City Study (Tier 2 Recommendation). If Tier 1 is found ineffective, Engineering conducts a second study and recommends a Tier 2 strategy. Staff will meet with the petitioner to review the recommendation before proceeding.
  6. 6
    City Mails Form TC-C — Tier 2 Petition. The City mails the Tier 2 petition to all households within 600 ft of the proposed improvement. A separate petition is required per improvement. The City mails twice.
  7. 7
    45-Day Voting Window. Residents have 45 days to respond (one 30-day extension possible if requested within 7 days of result notification). Non-responses count as NO votes. Voting YES does not create any financial obligation — this improvement is 100% City-funded.
  8. 8
    2/3 Threshold, Public Meeting & Board Approval. If 2/3 of households in the affected area vote YES, the petition passes. The project then proceeds to a public meeting and then to the Board of Commissioners for approval and funding authorization. Construction is scheduled based on budget availability.
Failed Petition — 24-Month Moratorium. If the petition does not reach the 2/3 threshold, a 24-month moratorium begins on the last day of the voting window. No new petition may be submitted for the same location during the moratorium. (12-month moratorium if the vote was within 12 months before 02/09/2026.)
Prioritization Scoring

When multiple Tier 2 petitions pass simultaneously, projects are ranked using the following 100-point scoring system to determine budget priority:

Criteria Max Points How Points Are Calculated
Speed excess (85th pct over 8 mph threshold) 40 pts 5 pts per mph above the 8 mph excess threshold
Traffic Volume (ADT) 20 pts ADT ÷ 250 (rounded down to nearest whole number)
Accident History 20 pts 5 pts per accident per year
Designated School Route 10 pts 10 pts if yes; 0 if no
Absence of Sidewalks 10 pts 10 pts if no sidewalks present; 0 if sidewalks exist
Total Possible Score 100 pts
Download Forms

Complete forms and email to Engineering, or deliver in person.

Form TC-A — Initial Study Request (PDF, 3MB) Form TC-C — Traffic Calming Petition (PDF, 3MB)

Email completed forms to: jaylen.mcclanahan@brentwoodtn.gov

Engineering Department Contact Jaylen McClanahan
5211 Maryland Way, Brentwood, TN 37027
(615) 371-0060  ·  jaylen.mcclanahan@brentwoodtn.gov
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