23rd Ave E Vision Zero Project

Updated: February 25, 2019

What’s happening now?

Upcoming Work

Starting as soon as late spring 2019, we'll add skid-resistant surface treatments at intersections where collision rates are high when road conditions are wet and slippery:

  • 24th Ave E/E Louisa St
  • 24th Ave E/E Lynn St
  • E Helen St/Turner Way

These surface treatments add a thin layer of course material on top of the street to improve skid-resistance to the pavement. We will update the webpage with more details on this work as the date approaches. We continue to analyze where we might install other enhancements and plan to construct a new half traffic signal at 24th Ave E and E Lynn St. These changes could happen as soon as 2020 and will be coordinated with SR 520 construction. For more details, please see below under the Phase 2 section.

What's next

Sign up on our project listserv to receive project updates and learn about future public involvement opportunities. For the latest project updates, see our email update archive. Interested in learning about transportation improvements happening on the southern end of 23rd Ave E? Visit the project website.

Project Overview

We're enhancing safety and mobility on 23rd Ave E/24th Ave E between E John St and E Roanoke St as part of our Vision Zero efforts to reach zero traffic deaths and serious injuries by 2030. The work will be done in two pieces over 2018 and 2019.

Phase 1 - Lane Rechannelization 

Data shows that people driving northbound between Boyer Ave E and E John St on average are going 39 MPH. The posted speed is 30 MPH. The chances of someone being fatally or seriously injured increase significantly being struck at 40 MPH versus 30 MPH.

In the last 3 years, there have been 134 total collisions on this portion of the corridor. These crashes caused 63 injuries to people walking, biking and driving. There has been 1 fatal collision on this street in the last decade. 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.

Modeling and experience indicated we could make the change without having a significant impact on capacity and that it will encourage speeds closer to 30 MPH. We are monitoring this low-cost investment to see how the street operates post-implementation.

Speed signs

Phase 2 - Crossing and transit stop improvements 

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 using your feedback and conducting additional analyses to determine where we might enhance transit stops, install a new traffic signal, modify parking, and add new curb ramps within the project area.

We're currently working on design for several improvements along the corridor including:

  • New half signal and associated curb ramp improvements at E Lynn St
  • Protected eastbound left-turn signal phase at 23rd Ave E/E John St
  • 2 striped curb bulbs at 24th Ave E/E Louisa St and 23rd Ave E/E Ward St
  • Bus stop amenity improvements

These improvements are expected to reach full design in early 2020 and go into construction as soon as spring 2020. 

Design Map

Project map

Other projects in the neighborhood:

Schedule

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

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

2019

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

Complete design for Phase 2 additional improvements along the corridor

2020

Construction of additional improvements (schedule subject to change)

Funding

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.

Materials

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