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
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.
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
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.
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.
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.





