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Delridge-Highland Park Neighborhood Greenway

Creating a network of family-friendly residential streets

Last updated: November 25, 2015

Project Update

Construction of the Delridge-Highland Park Neighborhood Greenway started in late August and will take approximately 4 months to complete, weather permitting. In general, construction is moving north to south along 21st Ave SW and 17th Ave SW.

With the onset of the rainy season, our contractor sometimes needs to shift its schedule to do work that can be done when it's raining, such as demolition and site preparation. Crews will primarily take advantage of the dry days to pour concrete and asphalt and to install pavement markings.

Note: Crews will not be working on major holidays.

Project Schedule Update and Progress

Construction at intersection of 16th Ave SW and SW Webster St

Crews have begun preparing the intersection at 16th Ave SW and SW Webster St for pedestrian safety improvements, including new crosswalks, new sidewalk, and new ADA-compliant curb ramps.

Beginning as soon as Tuesday, November 24, crews will begin pouring sidewalk and curb ramps. Weather permitting, this work is expected to be completed in two weeks.

Click here for construction notice

Construction at intersection of 15th Ave SW and SW Holden St

Beginning as soon as Monday, November 30, crews will begin preparing the intersection at 15th Ave SW and SW Holden St for safety improvements. Improvements at this intersection will include new sidewalk at each corner, a pedestrian crossing signal and crosswalk on the east and west sides of the intersection, and new ADA-compliant curb ramps.

Click here for construction notice

Construction update for area south  of 21st Ave SW and 22nd Ave SW intersection

Final work to be done in the area south of the 21st Ave SW and 22nd Ave SW intersection includes pouring concrete for sidewalk, and asphalt for rebuilding driveway, along the west side of 21st Ave SW. Both pours require dry days. Weather permitting, crews may complete this work as early as the beginning of December. Residents will be notified in advance of driveway closures.
Construction is nearing completion at the intersection of 21st Ave SW and SW Andover St. Crews will return to pour the remaining curb ramps and sidewalk on the southwest corner of the intersection. The intersection will remain open to through-traffic.

Full project plans, including speed hump locations, are available here 
As construction progresses throughout the corridor, you can expect the following:

  • Temporary on-street parking restrictions
  • Short-term single lane closures, where needed
  • Pedestrian and bicyclist detours
  • Noise, dust, and vibration typical of construction
  • Weekday work hours form 7 AM to 5 PM

Click here to view pre-construction mailer sent to properties along the greenway corridor.

Want to be added to the project email distribution list? Click here to sign up!

Questions? Contact the project team at or (206) 684-4747

Neighborhood greenways are safer, calmer residential streets for you, your family, neighbors and customers. On streets with low car volumes and speeds, a greenway can:

  • Improve safety
  • Help people cross busy streets
  • Discourage cut-thru traffic
  • Protect the residential character of our neighborhoods
  • Keep vehicle speeds low
  • Get people to where they want to go (e.g., parks, schools, shops and restaurants)

Neighborhood greenways are not car-free zones; they do not add bike lanes; and there are minimal, if any, on-street parking impacts. Learn more about greenways here.


Project Description

The greenway will run north-south, connecting White Center to the West Seattle Bridge trail. The greenway route will run generally along 17th Avenue SW in the south and 21st Avenue SW in the north. For a full description of the improvements we designed for this greenway and the route, please see the attached map. Some of the changes will include:

  • Crossing improvements at arterial intersections including striped crosswalks, curb extensions and flashing beacons
  • Repaving SW Myrtle Street between 17th and 21st Avenue SW
  • Speed humps and all-way stops where need, generally about one per block
  • Way-finding signage and pavement markings throughout
  • Spot pavement repairs to improve roadway user safety

The greenway route was selected based on various factors, including evaluating streets for low car volumes, speeds and collisions, road grade (or steepness), and input we heard from the community.

SDOT is working with Seattle Public Utilities (SPU) to design curb extensions with natural drainage systems along 17th Avenue SW, between SW Henderson Street and SW Kenyon Street. To learn more about SPU's Delridge Natural Drainage Systems project, check out their Web page or contact Don Anderson, SPU Project Manager, at or call (206) 233-1086.

Public Outreach

In 2013, the City conducted a survey and held two public meetings to identify the most promising route and safety improvements for a neighborhood greenway in the Delridge/Highland Park community. We received valuable feedback on traffic safety concerns, destinations where people want to walk and bike to, as well as known drainage and sewer backup problems. After analyzing data and reviewing public input, the most-promising greenway route was determined to be 17th Avenue SW from Roxbury to SW Kenyon or Holden Streets and 21st Avenue SW on the north end.

Project outreach has included:

  • Neighborhood survey responses (we received more than 280)
  • July 9, 2013 public meeting (where more than 80 people participated)
  • November 19, 2013 public meeting
  • Door-to-door flyering to affected properties
  • Meetings with community groups

Staff also walked and biked around your neighborhood to review different routes and observe locations and grades. Other information considered included traffic volume, speed, and collision data.

Project Funding

Project design of the neighborhood greenway is locally funded by the nine-year voter-approved Bridging the Gap Levy. This project is part of a $3.8 million budget to design and construct the 2015 Ballard and Delridge-Highland Park Greenways.

The natural drainage portion of the project is being funded by SPU.

Project Schedule

The project reached final design and construction will begin on August 24 and last for approximately four months.

Visit SPU’s Web page to learn more about SPU’s schedule to construct natural drainage infrastructure on 17th Avenue SW in Delridge.

Past Outreach and Materials

Project Contacts


Project Outreach Team

(206) 684-4747

CJ Holt
Project Manager
(206) 233-1556

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