For inquiries about the City's Neighborhood Traffic Safety Program, please contact Engineering Manager Brenton Cook, 206-973-4723, or bcook@seatacwa.gov.

Proposed Speed Humps Vote on S. 148th St (Military Rd S to 24th Ave S)

In late 2022, the City of SeaTac received a complaint from a resident who lives on South 148th Street regarding excessive speeding along this segment of roadway.  After collecting traffic data and conducting an engineering study, the City found that speeding levels were sufficiently high to justify adding speed humps to this roadway. Refer to the 'Proposed Speed Hump Locations Map" below that shows where the improvements will be installed. Traffic data, engineering findings, and plans for the proposed speed humps can be viewed using the links below.

In order for the City to move forward with constructing the speed humps, at least 60% of residents that would be directly impacted must vote to approve.

Voting has closed as of August 29, 2025

Total Voter Count

Total Vote Mailers Sent Out by City = 144
Total Mailers Unable to be Delivered = 0

 Final Vote Tabulation

Total ‘YES’ Votes = 38
Total ‘NO’ votes = 5
Total Non-Returns or Ineligible Returns (Defaults to ‘NO’ Vote) = 101 

Voter Approval Percentage = (38/144)*100 = 26.4%  

Despite the amount of ‘YES’ votes increasing by 9% compared to last year’s vote, the required 60% voter approval threshold was still not met.  As such, the City will not move forward with installation of speed humps on South 148^th Street at this time.  

This item will be eligible for a re-vote starting September 1, 2026.