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

Project Update

July 28, 2014

The Seattle Department of Transportation (SDOT) is continuing work on the Center Phase of the project, along N Northgate Way from Aurora Avenue N to Meridian Ave N. The eastbound travel lanes between Aurora and Meridian are scheduled to be reopened by early September, when this phase is completed.

The week of July 28, the contractor plans to begin signal, lighting and electrical improvements at intersections along NE Northgate Way, between the I-5 freeway and Lake City Way NE.  Lane and parking restrictions, as well as pedestrian detours, will be in place around active construction areas. These improvements, scheduled to be completed in two months, will take place at the following locations:

  • New dynamic message signs (DMS) at Lake City Way NE/NE 120th Street.
  • New closed-circuit TV cameras to help with traffic management and safety at 15th Ave NE/Northgate Way.
  • Miscellaneous electrical improvements at the intersections of:
    • 3rd Avenue NE/NE Northgate Way (west side)
    • 19th Avenue NE/NE Northgate Way (NE and SE corners)
    • 24th Ave NE/NE Northgate Way (NE and SE corners)
    • Lake City Way NE/27th Ave NE (west side)

Traffic Advisory:

The eastbound traffic detour currently in effect is expected to continue for approximately one more month. Eastbound traffic is being detoured at Aurora.

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

Westbound traffic on N Northgate Way will be maintained although it will be reduced to one lane.

The third and final phase of work, between Meridian Avenue N and Corliss Avenue N, is scheduled to take place late August/early September through mid-November. During this phase of work, lane reductions will be in place, but detours will not be necessary.

Nighttime work

On some weeknights in July and August, crews will work along N Northgate Way between Aurora Avenue N and Meridian Avenue N.  This work is scheduled to take place one or two nights per week and includes the use of concrete saw cutters. Work will occur on approximately 20 weeknights during this time period and will start as early as 6 p.m. and conclude by 6 a.m. 

Why is concrete saw cutting sometimes done at night? After a concrete roadway panel is poured, and at a certain point in its cure process, joints need to be cut across the panel in order to prevent cracking. The timing of making these cuts is variable and depends on factors such as temperature and humidity. While every attempt is made to conduct concrete saw cutting during normal working hours, at times this work must be done late at night or early in the morning.


Due to weather and unforeseen drainage installation obstacles, the project has taken longer than expected. We apologize for any inconvenience and thank you for your patience during construction.


Storm installation at Ashworth Avenue N and N Northgate Way

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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