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2013-2014 Arterial Paving Projects: N 105th, N/NE Northgate Way Improvement Project

June 4, 2014

Construction Switches to North Side of Northgate Way on June 12

Construction on the center phase of the N 105th/N Northgate Way Improvement Project began in early March when the work shifted to the stretch of N Northgate Way from Aurora Ave N to Meridian Ave N.  Since that time, the eastbound travel lanes through this construction zone have been closed, with westbound traffic reduced to a single lane while construction activity has been largely concentrated on the south side of the street.

Beginning Thursday, June 12, construction will switch to the north side of Northgate Way so that crews can install storm drainage structures, and to grind and remove the existing roadway pavement in preparation for the new roadway, sidewalks, curbs and gutters.  The eastbound travel lanes will remain closed, while the single westbound travel lane will be moved to the south side of N Northgate Way in order to enable continued construction.  (Detour routes will not change during this period.)

Construction activity between Aurora and Meridian is projected to last until mid-August, at which time both eastbound and westbound travel lanes will be fully reopened. 

Construction will then shift to the east and final phase of the project, the one block stretch between Meridian and Corliss Ave N (the street immediately west and adjacent to I-5).   Northgate Way is sufficiently wide through this one block stretch such that traffic will be maintained in both directions, although lane reductions are expected.  Work on this phase is projected to last through October. 

During the center phase, motorists will be detoured at Aurora Avenue N. (See detour map below.)

  • General purpose through traffic: North on Aurora Avenue N to N 115th Street or south on Aurora Avenue N to N 85th Street.
  • General purpose local traffic to nearby destinations, such as North Seattle Community College & Northgate Mall: South on Aurora Avenue N to N 90th Street, north on Wallingford Avenue N, east on N 92nd Street, then north along College Way N/N Meridian Avenue N.
  • Truck traffic: North on Aurora Avenue N to N 145th Street


Base repair @ 107th, PCCP Burke to Meridian

Project Overview

The Seattle Department of Transportation (SDOT) is making improvements along N 105th Street and N/NE Northgate Way from Greenwood Avenue North to Lake City Way Northeast.  Construction began last July and is currently projected to be completed in late summer 2014.

Improvements include complete roadway repaving, new sidewalks and curb ramps, drainage improvements, street lighting and street trees from Greenwood Avenue North to Corliss Avenue North.  SDOT will also upgrade traffic signals from Greenwood to Lake City Way (and along Lake City Way to North 102th Street). 

The paving element of the project, the most disruptive to motorists, has been divided into three distinct phases, with the contractor finishing one before moving onto the next.  The first phase, from Greenwood to Aurora, was completed at the end of February and required the closure of all eastbound traffic lanes, as well as the frequent reduction of westbound traffic to a single lane.

Crews are currently working on the middle phase of the project, between Aurora and Meridian Avenue North.  Again, the eastbound travel lanes have been closed and westbound travel reduced to a single lane.  As of this writing, it is expected these traffic restrictions will remain in place until summer.  (See above for the detour map for eastbound motorists.)

The final phase, the one block segment between Meridian Avenue North and Corliss Avenue North (the street immediately to the west of I-5), will follow.  Fortunately, the width of the roadway here is sufficient that both eastbound and westbound traffic will be maintained during construction, although with the likely reduction down to a single lane in each direction.   

Project Description

This project will improve the corridor along N 105th Street and N/NE Northgate Way from Greenwood Ave N to Lake City Way NE. Improvements will include roadway repaving, new sidewalks and curb ramps, drainage improvements, street lighting and traffic signals, and Intelligent Transportation System (ITS) components.

Roadway improvements include:

  • New paving on the roadway from Greenwood Avenue N to Corliss Avenue N.
  • New drainage infrastructure, including new stormwater detention pipes and water quality features.
  • New five-foot-wide sidewalks and curb ramps.
  • New roadway markings.

Signal, lighting and ITS improvements include:

  • Eight new street lights between Greenwood Avenue N and Corliss Avenue N.
  • New dynamic message signs (DMS) at N 105th Street/Evanston Avenue N and Lake City Way NE/NE 120th Street.
  • New closed-circuit TV cameras to help with traffic management and safety, at Greenwood Ave N/N 105th Street, Ashworth Avenue N/N 105th Street, and Meridian Avenue N/N Northgate Way.
  • Seven new cameras that provide real-time traffic information to web-based systems and the DMS signs.

What to expect during construction:

This project will have considerable impacts on traffic and the public. SDOT will conduct outreach to residents and businesses in the neighborhood beginning in Fall 2012 until project completion to ensure that they have the information they need to cope with construction.

Project Benefits

When this project is completed, it will have significant benefits for the public and motorists, including:

  • Improved safety for pedestrians.
  • Elimination of potholes.
  • Eased traffic congestion.
  • Improved water quality.
  • Transit speed and reliability.
  • Real-time information for travelers.


The project will take a little more than a year to complete, so should be done before this coming fall (2014). 

More Information

Project Contacts:

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