23rd Ave E Vision Zero Project

Updated: September 30, 2022 

What’s happening now?

Project updates

We've finished installing the new signals at E John St and E Lynn St. We're continuing to coordinate with Seattle City Light on the remaining electrical work to turn on the new signals. This Saturday, October 1, we plan to install the new crosswalk at E Lynn St. There will be intermittent lane closures and flaggers will be onsite to direct traffic.  

Next week, we'll start work at E Roanoke St to make bus stop enhancements and sidewalk repairs. The bus stop will be temporarily relocated within the vicinity. Please check King County Metro’s Service Advisories for more information.

Stay informed on what to expect during construction 

Sign up to receive regular project email updates during construction, and see below for more information on what to expect during construction. Please remember that construction schedules are always subject to change.

Check out our new video to learn more about the project, and for the latest project updates, see our email update archive.   

Project Overview

We're enhancing safety and mobility on 23rd Ave E/24th Ave E between E Madison St and E Roanoke St as part of our Vision Zero efforts to reach zero traffic deaths and serious injuries by 2030. This important street provides access to the Montlake neighborhood, SR 520, and the Montlake Bridge crossing into north Seattle and is a vital street for transit. Part of the project this work was completed in 2018 and the rest of the work began in October 2021. We expect project construction to be complete in spring 2022. 

Crossing and transit stop improvements (Construction began this October)

We heard from the Montlake community that traffic calming, reducing speeds, and pedestrian safety are the top transportation priorities on 23rd Ave E/24th Ave E. In addition to implementing the recommended design and installing skid-resistant surface treatments, we're enhancing transit stops, installing a new traffic signal, modifying parking, repairing sidewalks, and adding new curb ramps and marked crosswalks within the project area.  We have updated the design based on feedback from the community for several of the below improvements.

Improvements along the corridor include:

  • New walk/bike signal and associated curb ramp improvements at E Lynn St

New walk and bike signal improvements at E Lynn St

  •  Protected northbound, southbound, and eastbound left-turn signal phases at 23rd Ave E/E John St

Rendering of new protected northbound, southbound, and eastbound left-turn signals at the intersection of 23rd Ave E and E John St

  • 2 striped curb bulbs at 24th Ave E/E Louisa St and 23rd Ave E/E Ward St

	2 striped curb bulbs at 24th Ave E/E Louisa St and 23rd Ave E/E Ward St    	2 striped curb bulbs at 24th Ave E/E Louisa St and 23rd Ave E/E Ward St

  • Bus stop amenity improvements

Curb bulbs

Curb bulbs reduce the number and severity of traffic collisions by increasing the visibility of vulnerable users - people walking and biking - and decreasing the distance they have to travel to get across the street.  

High friction surface treatment

HFST adds a thin layer of coarse material on top of the street to improve skid-resistance to the pavement. We're adding HFST at intersections where collision rates are high when road conditions are wet and slippery.  

Signalized crosswalk

Install signalized crosswalk. Walk/bike signals stop car traffic to allow people who walk and bike to safely cross the intersection.

Protected left turn signals

Protected left-turn signal phases (northbound, southbound, and eastbound) will reduce opportunities for collisions.  

Upgraded traffic signals

New signal heads and upgraded signal arms will enhance safety and improve visibility. 

Lane Rechannelization (complete)

Data shows that people driving northbound between Boyer Ave E and E John St on average speed 10 MPH over the speed limit. The posted speed is 25 MPH. The chances of someone being fatally or seriously injured increase significantly being struck at 40 MPH versus 30 MPH.

Modeling and experience indicated we could rechannelize these lanes without having a significant impact on capacity and that it will encourage speeds closer to 25 MPH. We will continue to monitor these changes and traffic patterns as the project is completed. 

Speed signs

Design Map

Project area map showing locations of project improvements.

Other projects in the neighborhood:

What to expect during construction 

Typical construction hours are weekdays from 7 AM - 5 PM with occasional nighttime and weekend work. Typical activities will include:

  • Temporary lane and street closures for people driving
  • Temporary sidewalk and crossing closures and detours for people walking and rolling
  • Temporary bus stop relocations
  • Disruptions to on-street parking
  • Noise, dust and vibrations during work hours

Help us understand your needs during construction! Please complete this survey so we can keep you in the loop and work to minimize impacts to neighbors as much as possible. See our construction poster and let us know if you would like a copy for your business or residential building. 


Graphic showing project schedule: planning in 2017, design in 2018, construction of segment 1 in fall 2018 and construction of segment 2 in 2021.

Summer 2017

Share what we heard to date and suggest possible near-and long-term alternatives

Spring 2018

Share conceptual design of near-term safety improvements

Summer/Fall 2018

Segment 1 construction of recommended design (E John St to Boyer Ave E) completed


Installation of skid-resistant surface treatments at intersections with high collision rates

Complete design for Phase 2 additional improvements along the corridor


Continue design for Segment 2 additional improvements along the corridor

*Project put on pause in June 2020 in response to COVID-19 budget shortfalls 


Complete design for Segment 2 additional improvements along the corridor 

Begin construction of Segment 2 improvements 

Spring 2022

Complete project construction  


This project is funded by the 9-year Levy to Move Seattle, approved by voters in 2015, the City general fund, and through the Seattle Transportation Benefit District.


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