Denny Way ITS (Intelligent Transportation Systems) Project

October 18, 2021

What's happening now?

We're pleased to announce that final design is complete, and that construction is scheduled to begin as soon as November 15, 2021. Initial activities include mobilizing equipment, staging materials, and demolition at the intersection of Denny Way and Western Ave W.

Before work begins, we're hosting an online drop-in session where you'll be able to:

  • Learn about the project schedule and about what to expect during construction
  • Participate in a Q&A session
  • Engage with the project team 

Event details 

Wednesday, November 3
4:30 to 5:30 PM
Online via Zoom platform: https://bit.ly/DennyITS 

To request an interpreter or accessibility accommodations, please email DennyITS@seattle.gov by October 26. 

What to expect during construction
Construction activities will include demolition and trenching through street intersections and sidewalks to install electrical conduits; signal foundation and pole work; installation of new ADA-compliant curb ramps; and restoring pavement. Work will be done along Denny Way at each signalized intersection, beginning at Western Ave and moving east. To minimize impacts, most work will be done during off-peak hours, at night and on weekends only. 

During construction, you can expect:

  • Dust, noise, and vibration
  • Sidewalk closures and pedestrian detours
  • Advance notification to businesses and residents of driveway closures
  • Business access will be maintained. Adjacent trees will be protected during construction and any disturbed vegetation will be restored.
  • Off-peak traffic restrictions and detours
  • Temporary pavement surfaces and steel plates in roadway  

Project Description

We use a variety of technologies to improve multi-modal travel across the city, including upgrading traffic signals. These technologies are known as Intelligent Transportation Systems, or ITS. ITS plays a key role in a safe, efficient, and innovative transportation system that works for all travelers. Much of what we do is not visible to the traveler.

This project will have minor impacts during construction to the southeast corner of Denny Park located at Denny Way and 9th Ave N, on Seattle Parks and Recreation property:

  • Install new APS (Accessible Pedestrian Signals) push buttons on a 4.5-foot pushbutton post.
  • Replace existing signal cabinet at this location with a new signal cabinet equipped with a new service disconnect cabinet.
  • Replace curb ramps at this corner and restore sidewalk pavement.
  • A traffic control plan and pedestrian detours will be in place during construction. Adjacent trees will be protected during construction and any disturbed vegetation will be restored.
  • Minor changes within Denny Park have been determined to be de minimis under Section 4(f) of the U.S. Department of Transportation (USDOT) Act of 1966. Compliance with Section 4(f) is required for projects receiving federal funding.

Project Map

Map showing project area on Denny Way from Western Ave to Minor Ave N.

Funding

This project is funded in part by the 9-year Levy to Move Seattle, approved by voters in 2015, and by funds by the Federal Highway Administration. 

Schedule

Project schedule graphic showing planning phase from early 2016 to late 2018, design phase from late 2018 to late 2021, and construction phase from late 2021 to late 2022.

The project underwent several months of hold during planning and design phases to align scope with funding.

Other SDOT projects in the area