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HomeMy WebLinkAboutTraffic Calming Program 2026Traffic Calming Program COMMITTEE OF THE WHOLE MEETING BLAKE COSTA, PE, PTOE –CIVIL ENGINEER III Public Works Transportation Operations Traffic Calming Program Introduction Small-Scale Project Example Large-Scale Project Example Objective Improve traffic safety by reducing vehicle speeds and/or volumes on a street or street network Project Characteristics Typically small-scale Consist of minor modifications to existing conditions Other projects that are large-scale may be developed into a project under the Transportation Improvement Program (TIP) Traffic Calming Program Tier Traffic Calming Tier 1 Traffic Calming Treatments Does not physically disrupt the path of a motor vehicle Signing and pavement marking Driver feedback signs Tier 2 Traffic Calming Treatments Physically disrupts the path of a motor vehicle Speed cushions (local and collector streets, 25 mph or less) Chicanes, or narrowing treatment (curb extensions, lane width reduction) Roundabouts Traffic circles Tier 1 Traffic Calming Example Tier 2 Traffic Calming Example Traffic Calming Program Procedure Request for traffic calming Tier 2 traffic calming treatments selected Do residents support tier 2 traffic calming? Tier 2 traffic calming treatments installed and after speed study At Least One Year Elapses Yes Yes Yes Tier 1 traffic calming Procedure passed? Tier 2 traffic calming Procedure passed? Tier 1 traffic calming treatments installed Collect speed data Tier 1 Traffic Calming Procedure Collect and analyze speed data Is 85th percentile speed* ≥ the speed limit + 5 mph? Yes, then Tier 1 Traffic calming treatments are installed No, then speeding referred to Renton Police Department and no traffic calming is installed. Radar trailer(s) deployed; residents may request radar trailers at any time After at least one year, repeat speed data collection and analysis If speeding persists, consider Tier 2 Traffic Calming Treatments, or large-scale project in TIP If speeding does not persist, existing traffic calming treatment remains and no other action taken Tier 1 Driver Feedback Sign Tier 1 Pavement Markings and Signing Tier 1 Traffic Calming Driver Feedback Signs Displays driver’s speed with speed limit sign Displays SLOW DOWN if travelling over the speed limit Educates and reminds drivers of their speed and speed limit Most locations are on rotation throughout the City Driver Feedback Rotation: Installed for 3 months, then rotated to other locations throughout the City Reinstalled after 9 – 12 months Speed data collected after 2nd installation to determine if Tier 2 traffic calming treatments are needed Tier 1 Driver Feedback Sign Traffic Calming Program Procedure Request for traffic calming Tier 2 traffic calming treatments selected Do residents support tier 2 traffic calming? Tier 2 traffic calming treatments installed and after speed study At Least One Year Elapses Yes Yes Yes Tier 1 traffic calming Procedure passed? Tier 2 traffic calming Procedure passed? Tier 1 traffic calming treatments installed Collect speed data Tier 2 Traffic Calming Procedure Tier 1 Procedure completed after a year and speeding persists Appropriate/feasible Tier 2 traffic calming treatment selected, or if large scale consider addition to TIP Project is ranked among all current projects Scored on 85th % Speed, number of speeders, school walk route or school bus stop, pedestrian activity level, and crash history Survey letters mailed to residents for support If >65% support traffic calming treatment, then project moves forward If <65% support traffic calming treatment, then Tier 1 traffic calming treatments will remain. Alternative designs may be investigated, and residents will be surveyed again Implement design and construction Project concluded by before and after traffic study Tier 2 – Speed Cushions Tier 2 – Traffic Circles Tier 2 Traffic Calming Project List Rank Primary Road Cross Street 1 Cross Street 2 Total Notes 1 SW Langston Rd S 134th St SW Sunset Blvd 26 Construction 2026 2 NE 12th St Olympia Ave NE Union Ave NE 26 Construction 2026 3 Lake Washington Blvd N Burnett Ave N I-405 54 Construction 2027 - Hold due to I-405 Const. 4 Jones Ave NE NE 28th St NE 20th St 21 Construction 2027 5 N 30th St Burnett Ave N Park Ave N 18 Residential Neighborhood - Medium Density 6 120TH Ave SE SE 192nd St SE 184th St 17 Residential Neighborhood 7 Renton Ave S Mill Ave S S 7th St 15 Residential Neighborhood 8 NE 12th St Aberdeen Ave NE Edmonds Ave NE 15 Identified Traffic Calming 2022 Location 9 NE 24th St Union Ave NE Duvall Ave NE 12 Identified Traffic Calming 2022 Location 10 Duvall Ave NE NE 2nd St SE 2nd Pl 11 Identified Traffic Calming 2022 Location 11 NE 7th St Monroe Ave NE Redmond Ave NE 8 Residential Neighborhood - Medium Density 12 160th Ave SE SE 134th St SE 144th St 8 Residential Neighborhood 13 SE 184th St 120th Ave SE 121st Pl SE 7 Residential Neighborhood - Low Density The "Total" column represents the total points scored for ranking purposes. Scoring criteria is based on the 85th Percentile Speed, Number of Speeders, School Walk Route/School Bus Stop, Pedestrian Activity, and Number of Crashes Traffic Calming Program 2025 Projects SW 5th Place SW 5th Ct to Hardie Ave SW Contractor completed 4 sets of speed cushions in October 2025 Aberdeen Avenue NE: NE 12th St to NE 24th St Contractor completed 9 sets of speed cushions in October 2025 Total Project Cost: $193,875.00 Aberdeen Avenue NE SW 5th Place Traffic Calming Program 2025 Projects 120th Ave SE: SE 184th St to SE 188th St City Maintenance Staff completed 2 sets of speed cushions in October 2025 This was a small scale project that was done after most of the summer roadway maintenance activities were completed Total Project Cost: $6,000.00 120th Avenue SE Traffic Calming Program 2026 Projects SW Langston Road Speed Cushions – Project Limits Current Programmed Funds: $335,000.00 (Design and Construction Costs) Traffic Calming Program 2026 Projects NE 12th Street Speed Cushions – Project Limits Current Programmed Funds: $335,000.00 (Design and Construction Costs) Traffic Calming Program 2027 Projects Potential Project Locations Jones Ave NE Speed Cushions  NE 20th St to NE 28th St Lake Wa Blvd N Speed Cushions Burnette Ave N to I-405 Questions?