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I-405 - Construction Updates

Last update: 4:05 p.m. Friday Aug. 29, 2014

If you have questions or comments about I-405 in Washington state that are not addressed by these resources, please contact the I-405 Project Office at 425-456-8585.



I-405: NE 6th Street to I-5 Widening and Express Toll Lanes Project - #8204

Last update: 9:39 a.m., 8/29/14
Milepost: 13.5 - 30
Steve Peer, Public Information, 425-456-8624
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BLT map


Please note: Crews will not work Aug. 29 to Sept. 1 in observance of the Labor Day holiday weekend.

Ramp Closures:

Bellevue area

  • Tuesday, September 2 to the morning of Thursday, September 4 – The Northeast Tenth Street on-ramp to SR 520 will close from 11 p.m. to 4 a.m. nightly for barrier and guardrail work.
  • Tuesday, September 2 to the morning of Thursday, September 4 – The northbound I-405 ramp to westbound SR 520 will close from 11 p.m. to 4 a.m. nightly for electrical work.


Bothell area

  • Tuesday, September 2 to the morning of Friday, September 5 – The Northeast 160th Street on-ramp to southbound I-405 will close from 8 p.m. to 5 a.m. nightly for paving work.

Kirkland area   

  • Tuesday, September 2 to the morning of Friday, September 5 – The northbound I-405 off-ramp to Northeast 70th Street will close from 9 p.m. to 6 a.m. nightly for electrical work (will open bus ramp by 5 a.m. for transit).
  • Tuesday, September 2 to the morning of Friday, September 5 – The Northeast 70th Street on-ramp to southbound I-405 will close from 8 p.m. to 6 a.m. for paving work.
  • Tuesday, September 2 to the morning of Friday, September 5 – The Northeast 85th Street on-ramp to southbound I-405 will close from 10 p.m. to 6 a.m. nightly for paving work. This ramp will not close if the NE 70th Street on-ramp to southbound I-405 closes.
  • Tuesday, September 2 to the morning of Wednesday, September 3 – The southbound I-405 off-ramp to Northeast 70th Street will close from 9 p.m. to 6 a.m. for paving work. This ramp will not close if the NE northbound I-405 off-ramp to NE 70th Street closes.
  • Thursday, September 4 to the morning of Friday, September 5 – The southbound I-405 off-ramp to Northeast 70th Street will close from 9 p.m. to 6 a.m. for paving work. This ramp will not close if the NE northbound I-405 off-ramp to NE 85th Street closes.
  • Tuesday, September 2 to the morning of Friday, September 5 – The northbound I-405 off-ramp to Northeast 85th Street will close from 10 p.m. to 6 a.m. nightly for guardrail removal, roadway excavation and paving work. This ramp will not close if the NE northbound I-405 off-ramp to NE 70th Street closes.
  • Tuesday, September 2 to the morning of Friday, September 5 – The Northeast 85th Street on-ramp to northbound I-405 will close from 10 p.m. to 6 a.m. nightly for electrical, roadway excavation and paving work
  • Tuesday, September 2 to the morning of Thursday, September 4 – The southbound I-405 off-ramp to Northeast 85th Street will close from 9 p.m. to 6 a.m. nightly for roadway excavation and paving work. This ramp will not close if the NE northbound I-405 off-ramp to NE 70th Street closes.
  • Tuesday, September 2 to the morning of Friday, September 5 – The northbound I-405 off-ramp to Northeast 128th Street will close from midnight to 6 a.m. nightly for electrical and drainage work.
  • Tuesday, September 2 to the morning of Friday, September 5 – The Northeast 128th Street on-ramp to northbound I-405 will close from midnight to 6 a.m. nightly for electrical and drainage work.
  • Tuesday, September 2 to the morning of Friday, September 5 – The southbound I-405 off-ramp to Northeast 128th Street will close from 8 p.m. to 4:50 a.m. nightly for electrical work.
  • Tuesday, September 2 to the morning of Friday, September 5 – The Northeast 128th Street on-ramp to southbound I-405 will close from 8 p.m. to 4:50 a.m. nightly for electrical work.
  • Tuesday, September 2 to the morning of Friday, September 5 – The Northeast 160th Street on-ramp to southbound I-405 will close from 8 p.m. to 5 a.m. nightly for paving work.

Lane Closures: 

Bellevue area

  • No closures

Bothell/Lynnwood area

  • No closures

Kirkland Area

  • Tuesday, September 2 to the morning of Friday, September 5 – Up to two lanes of northbound I-405 between Northeast 70th Street and Northeast 85th Street will from 8 p.m. to 7 a.m. nightly for guardrail installation work.
  • Tuesday, September 2 to the morning of Wednesday, September 3 – One lane of southbound I-405 between Northeast 85th Street and Northeast 70th Street will close from 7 p.m. to 5 a.m. for paving work.
  • Thursday, September 4 to the morning of Friday, September 5 – One lane of southbound I-405 between Northeast 85th Street and Northeast 70th Street will close from 7 p.m. to 5 a.m. for ramp restriping work.
  • Tuesday, September 2 to the morning of Thursday, September 4 – One lane of southbound I-405 between Northeast 124th Street and Northeast 85th Street will close from 7 p.m. to 5 a.m. nightly for guardrail removal work.

I-405: City of Kirkland Street Overlay Project - NE 124th Street

Last update: 4:05 p.m., 8/29
Milepost: 20.30
Christian Knight, neighborhood services coordinator, 425-587-3831
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  • Tuesday, Sept. 2 to the morning of Thursday, Sept 4 - The northbound I-405 off-ramp to Northeast 124th Street will close nightly from 9 p.m. to 5 a.m. for electrical work.
  • Tuesday, Sept. 2 to the morning of Wednesday, Sept 3 - The westbound Northeast 124th Street on-ramp to northbound I-405 will close from 9 p.m. to 5 a.m.  for electrical work.
  • Wednesday, Sept. 3 to the morning of Thursday, Sept 4 - The eastbound Northeast 124th Street on-ramp to northbound I-405 will close from 9 p.m. to 5 a.m. for electrical work.

I-405: SE 8th to Northup Way Paving - #8601

Last update: 4:05 p.m., 8/29
Milepost: 13.68-14.85
Mark Sawyer, project engineer, 425-225-8799
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  • Tuesday, Sept. 2 to the morning of Thursday, Sept. 4- Up to three lanes of southbound I-405 between SR 520 and Southeast 6th Street will close nightly from 8 p.m. to 5 a.m. for paving work. During the closures, the ramps to and from Southeast 6th Street will also be closed.
  • Thursday, Sept. 4 to the morning of Friday, Sept. 5 - Up to three lanes of southbound I-405 between SR 520 and Southeast 6th Street will close from 8 p.m. to 5 a.m. for paving work. The on-ramp to SR 520 and the Northeast 8th Street off-ramp will also be closed.
  • Friday, Sept. 5 to the morning of Saturday, Sept. 6 - Up to three lanes of southbound I-405 between SR 520 and Southeast 6th Street will close starting at 8 p.m. All lanes will reopen by 9 a.m. Saturday. The 4th Street on- and off-ramps and the Southeast 8th Street off-ramp will also all be closed.
  • Saturday, Sept. 6 to the morning of Sunday, Sept. 7 -  Up to three lanes of southbound I-405 between SR 520 and Southeast 6th Street will close starting at 7 p.m. All lanes will reopen by 10 a.m. Sunday. The 6th Street on- and off-ramps will be also be closed.
  • Sunday, Sept. 7 to the morning of Monday, Sept. 8 - Up to three lanes of southbound I-405 between SR 520 and Southeast 6th Street will close from 8 p.m. to 5 a.m. The 6th Street on- and off-ramps will also be closed.
  • Monday, Sept. 8 to the morning of Tuesday, Sept. 9 - Up to three lanes of southbound I-405 between SR 520 and Southeast 6th Street will close from 8 p.m. to 5 a.m. The SR 520 on-ramp and the Northeast 8th Street off-ramp will also be closed.
  • Tuesday, Sept. 9 to the morning of Wednesday, Sept. 10 - Up to three lanes of southbound I-405 between SR 520 and Southeast 6th Street will close from 8 p.m. to 5 a.m. The 4th Street on- and off-ramp and the Southeast 8th Street off-ramp will all be closed.
  • Wednesday, Sept. 10 to the morning of Friday, Sept. 12 - Up to three lanes of southbound I-405 between SR 520 and Southeast 6th Street will close nightly from 8 p.m. to 5 a.m. for paving work. During the closures, the 6th Street on- and off-ramps ramps will also be closed.

I-405: SR 520 - 108th Ave NE to W Lake Sammamish Pkwy paving #8597

Last update: 12:54 p.m., 8/29
SR 520: 108th Ave NE to W Lake Sammamish Pkwy paving #8597
Milepost: 6.22 – 11.69
Mark Sawyer, Project Engineer, 425-225-8799
Get Project information

There may be closures on SR 520 for this project.

  • DRIVER ALERT: Tuesday, Sept. 2 to the morning of Wednesday, Sept. 3 - The southbound I-405 ramp to eastbound 520 will close from 9 p.m. to 5 a.m. for paving work.
  • Tuesday, Sept. 2 to the morning of Wednesday, Sept. 3 - The left lane of eastbound SR 520 will be closed between 108th and 124th from 9 p.m. to 5 a.m. for paving work.
  • Wednesday, Sept. 3 to the morning of Thursday, Sept. 4 - The ramp from westbound SR 520 to 51st will close from 9 p.m. to 5 a.m. for paving work.
  • DRIVER ALERT: Wednesday, Sept. 3 to the morning of Thursday, Sept. 4 - The ramps from westbound SR 520 to northbound and southbound I-405 will close from 9 p.m. to 5 a.m. for construction work.
  • Thursday, Sept. 4 to the morning of Friday, Sept. 5 - The left lane of eastbound SR 520 will be closed between 108th and 124th from 9 p.m. to 5 a.m. for paving work.
  • DRIVER ALERT: Thursday, Sept. 4 to the morning of Friday, Sept. 5 - The northbound I-405 ramp to eastbound SR 520 will be closed from 9 p.m. to 5 a.m. for paving work.
  • DRIVER ALERT: Thursday, Sept. 4 to the morning of Friday, Sept. 5 - The eastbound SR 520 ramp to 124th will close from 9 p.m. to 5 a.m. for paving work.
  • DRIVER ALERT: Sunday, Sept. 7 to the morning of Wednesday, Sept. 10 - The ramps from westbound SR 520 to northbound and southbound I-405 will close nightly from 9 p.m. to 5 a.m. for construction work.