8th Ave NW Safety Improvements

Updated September 2026

Project Overview

We’re planning improvements for people walking, biking, and rolling on 8th Ave NW between NW 46th St and NW 70th St. In 2025, we added intersection visibility improvements at NW 70th St, NW 53rd St, and NW 51st St. This year, we’re planning more safety improvements along the corridor.  

This project is in the design phase, and we expect to complete construction this fall. See below for more details on the design. 

Project elements include:

  • 13 Speed cushions 
    • To prevent drivers from driving in the bike lanes to avoid speed cushions, we will shift the bike lane into the curbside lane (removing 1-2 parking spaces) and add paint and barriers next to the bike lane at each location. This makes the street safer and more predictable for everyone.
  • Marked crosswalks with pedestrian islands
    • To discourage drivers from going over the posted speed limit, prevent passing in the center turn lane, and improve the comfort of pedestrians crossing the street, we will be adding small concrete medians at the new marked crosswalks.   
  • 2 Radar speed signs
  • A traffic diverter and button-activated flashing crossing signs at NW 70th St 

Background

In the summer of 2025, we shared our preliminary plans for the corridor at a community event and with the advocates who garnered support for improvements to 8th Ave NW. In 2026, we developed designs for the corridor, shown below.  

Design

Map graphic shows 8th Ave NW between NW 70th St and NW 48th St with project elements shown as symbols along the corridor.

The design for 8th Ave NW between NW 46th St and NW 70th St includes speed cushions, pedestrian islands, marked crosswalks with flashing pedestrian crossing signs, speed radar signs, and a traffic diverter. 

Graphic shows speed cushions next to a bike lane with labels for "Flex Posts" and "Parking removal (1-2 spaces)"

Next to the planned speed cushions, we will add paint, posts, or other barriers and remove a small amount of nearby parking, typically 1-2 spaces on each side of the street. This helps prevent people driving from using the bike lane to go around the cushion, making the street safer and more predictable for everyone. 

Map graphic shows intersection of NW 70th St and 8th Ave NW with new center median island, flashing beacons, bike push buttons, and speed humps.

The design for the NW 70th St intersection includes:

  • A new marked crosswalk across 8th Ave NW on the north leg of the intersection
  • New button-activated crossing signs, or "flashing beacons" on both crosswalks
  • A new concrete median island, or "traffic diverter"
    • This restricts vehicle left turns from 8th Ave NW onto NW 70th St and restricts east/west through traffic for vehicles on NW 70th St
  • Intersection visibility improvements, or "intersection daylighting" will be changed from paint and posts to concrete islands
  • New pavement markings for bikers crossing 8th Ave NW
  • New speed cushions on 8th Ave NW to slow vehicles approaching the intersection
    • Next to the speed cushions, the bike lanes are buffered, which requires the removal of 1-2 parking spaces 

Map graphic shows intersection of NW 53rd St and 8th Ave NW with new speed cushions, marked crosswalks, and shielding islands.

The design for the NW 53rd St intersection includes new marked crosswalks across 8th Ave NW, each with a pedestrian island, and new speed cushions on 8th Ave NW to slow vehicles approaching the intersection. Next to the speed cushions, the bike lanes are buffered, which requires the removal of 1-2 parking spaces. 

Map graphic shows the intersection of 8th Ave NW and NW 51st St with new speed cushions, marked crosswalks, and shielding islands.

The design for the NW 51st St intersection includes new marked crosswalks across 8th Ave NW, each with a pedestrian island, and new speed cushions on 8th Ave NW to slow vehicles approaching the intersection. Next to the speed cushions, the bike lanes are buffered, which requires the removal of 1-2 parking spaces. 

Map graphic shows the intersection of 8th Ave NW and NW 49th St with new speed cushions, marked crosswalks, and shielding islands. Next to bike lanes there is parking removal of 1-2 spaces.

The design for the NW 49th St intersection includes new marked crosswalks across 8th Ave NW, each with a pedestrian island, and new speed cushions on 8th Ave NW to slow vehicles approaching the intersection. Next to the speed cushions, the bike lanes are buffered, which requires the removal of 1-2 parking spaces.

Funding

This project is funded by the 2024 voter-approved Seattle Transportation Levy.

Transportation

Angela Brady, Acting Director
Address: 700 5th Ave, Suite 3800, Seattle, WA, 98104
Mailing Address: PO Box 34996, Seattle, WA, 98124-4996
Phone: (206) 684-7623
684-Road@seattle.gov

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The Seattle Department of Transportation (SDOT) is on a mission to deliver a transportation system that provides safe and affordable access to places and opportunities for everyone as we work to achieve our vision of Seattle as a thriving, equitable community powered by dependable transportation.