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2015-2016 Construction Hot Spots

The construction traffic management team analyzed impacts of highway and local road projects for 2015 through 2016 and identified three hot spots and two watch list  areas in the greater Puget Sound region. Hot spots are areas where several roadway construction projects occur in close proximity at the same time. Watch list areas also have several projects occurring, but do not necessitate the extra coordination required by a hot spot. We track watch lists because they may require additional coordination as updated closure information becomes available. Early coordination in hot spots keeps traffic moving during construction and helps projects stay on time and within budget.

Interested in other construction outside the hot spots and watch lists? Check out the county data for major projects in King, Pierce, Skagit, Snohomish, Whatcom and Kitsap counties.

Map of 2015-2016 construction hot spots


How to Read Maps and Schedules

Project data for each area is represented in two documents: maps and schedules. Each of these documents displays the project data in different ways.

Maps are visual tools used to show approximate project locations and anticipated impacts. The maps represent all projects occurring during the time period listed in the heading; not all projects shown on the map will occur at the same time. If the map heading says '1/1/2015-1/31/2015', this means that all project on the map occur in January 2015. The numbers used to label projects on the maps correspond to the ID number in the schedule.

Schedules provide more detailed information about the anticipated impacts for each project. Basic project information (ID number, project title, start and end date, contact information, etc) is displayed on the left and detailed impact information is shown on the right.

Instructions for reading and interpreting maps and schedules are shown in the introduction to hot spot maps and Gantt charts (pdf 29 kb).

Hot Spot Information*

Seattle  (updated: 9/30/2014)

There are several overlapping projects working along the Seattle Waterfront in 2015-2016. These along with other projects affecting North-South corridors through downtown Seattle could potentially impact traffic and transit in the city.
Maps (pdf 473 kb)

Schedule (pdf 574 kb)


North Lake Washington (updated: 10/3/2014)

A new bridge will be built on SR 520, I-405 will be widened and express toll lanes will begin, and major work will be occurring on I-90. All of these projects along with several others in the Lake Washington area will need to closely coordinate their closures in order to keep traffic moving around and across the lake.
Maps (pdf 714 kb)

Schedule (pdf 516 kb)


South King - North Pierce County (updated: 9/29/2014)

The I-5 corridor though downtown Tacoma continues to be an area of major construction activity in 2015 and 2016. There are also multiple projects affecting the parallel routes of I-5 and SR 167, along with multiple projects on SR 164.
Maps (pdf 413 kb)

Schedule (pdf 444 kb)


Watch List Information*

SeaTac (updated: 9/30/2014)

This area is on our watch list due to multiple projects in close proximity on I-5, SR 99, SR 518, SR 181, I-405 and SR 509 in the SeaTac/Tukwila area. None of these projects have major impacts to traffic, but we continue to watch the area in case there are any changes.
Maps (pdf 340 kb)

Schedule (pdf 184 kb)


Everett Area (updated: 10/03/2014)

There are some high impact projects occurring in downtown Everett, along with multiple projects on I-5 in the Marysville area. Most of the impacts occurring in this watch list area will happen in 2015 and not 2016. We are continuing to monitor this area for any additional projects or potential conflicts.
Maps (pdf 366 kb)

Schedule (pdf 2.83 mb)




County Information*

Island (updated: 9/23/2014)
Map (pdf 296 kb)
Schedule (pdf 117 kb)

King (updated: 10/03/2014)
Map (pdf 323 kb)
Schedule (pdf 935 kb)

Kitsap (updated: 9/24/2014)
Map (pdf 332 kb)
Schedule (pdf 93 kb)

Pierce (updated: 10/3/2014)
Map (pdf 309 kb)
Schedule (pdf 187 kb)

Skagit (updated: 9/24/2014)
Map (pdf 169 kb)
Schedule (pdf 94 kb)

Snohomish (updated: 10/03/2014)
Map (pdf 481 kb)
Schedule (pdf 149 kb)

Whatcom (updated: 9/23/2014)
Map (pdf 127 kb)
Schedule (pdf 125 kb)


    * Please note:
    • Information on the maps and schedules is useful for planning purposes, but is subject to change without notice due to the fluid nature of construction schedules. Closure information tends to become more accurate as the closure date approaches. For more information about construction closures occurring in the next week, check out our Construction Update page.
    • Maps and schedules focus on highway and arterial construction and do not list every construction project in every neighborhood
    • Maps and schedules include information from multiple public agencies for coordination and planning purposes; each agency retains responsibility for their own construction and related traffic closures.
    • For more detailed information about construction in Seattle, check out the Seattle Department of Transportation's construction closures page.
    • Maps and schedules are numbered as a single set for each area, but are divided into separate pdfs for ease of use.
    • Maps are designed for printing on 11'' by 17'' paper.
    • Schedules are designed for printing landscape on 11" by 17" paper.