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I-405 - Construction Updates

Last update: 12:43 p.m. Monday, Oct. 20, 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: 3:10 p.m., 10/10/14
Milepost: 13.5 - 30
Steve Peer, Public Information, 425-456-8624
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BLT map


Ramp Closures:

Bellevue area

  • Monday, Oct. 20 to the morning of Friday, Oct. 24 – The Northeast Sixth Street on-ramp to northbound I-405 will close from 11 p.m. to 5 a.m. nightly for miscellaneous construction work.

Bothell area

  • Nothing to report.

Kirkland area   

  • Monday, Oct. 20 to the morning of Friday, Oct. 24 – The southbound I-405 off-ramp to Northeast 70th Street will close from 9 p.m. to 6 a.m. nightly for roadway excavation work.
  • Monday, Oct. 20 to the morning of Friday, Oct. 24 – The Northeast 85th Street on-ramp to southbound I-405 will close from 10 p.m. to 6 a.m. nightly for grading and electrical work. This ramp will not close if the Northeast 70th Street on-ramp to southbound I-405 closes.
  • Monday, Oct. 20 to the morning of Friday, Oct. 24 – The southbound I-405 off-ramp to Northeast 85th Street will close from 9 p.m. to 6 a.m. nightly for grading and drainage work. The ramp will not close if the southbound I-405 to Northeast 70th exit ramp closes.
  • Monday, Oct. 20 to the morning of Friday, Oct. 24 – The northbound I-405 off-ramp to Northeast 128th Street will close from midnight to 6 a.m. nightly for electrical and barrier work.
  • Monday, Oct. 20 to the morning of Friday, Oct. 24 – The Northeast 128th Street on-ramp to northbound I-405 will close from midnight to 6 a.m. nightly for roadway excavation and grading work.
  • Monday, Oct. 20 to the morning of Friday, Oct. 24 – The southbound I-405 off-ramp to Northeast 128th Street will close from 8 p.m. to 4:50 a.m. nightly for electrical and barrier work.
  • Monday, Oct. 20 to the morning of Friday, Oct. 24 – The Northeast 128th Street on-ramp to southbound I-405 will close from 8 p.m. to 4:50 a.m. nightly for electrical and barrier work.
  • Tuesday, Oct. 21 to the morning of Thursday, Oct. 23 – The Northeast 160th Street on-ramp to northbound I-405 will close from 10 p.m. to 6 a.m. nightly for barrier work. The ramp will not close if the Northeast 160th to southbound I-405 ramp closes.
  • Tuesday, Oct. 21 to the morning of Thursday, Oct. 23 – The northbound I-405 ramp to SR 522 to will close from 9 p.m. to 6 a.m. nightly for barrier work. The ramp will not close if the Northeast 160th to southbound I-405 ramp closes.

Lane Closures: 

Bellevue area

  • Monday, Oct. 20 to the morning of Friday, Oct. 24 – One lane of northbound I-405 between Northeast Sixth Street and SR 520 will close from 8 p.m. to 5 a.m. nightly for barrier work.

Bothell/Lynnwood area 

  • Thursday, Oct. 23 to the morning of Friday, Oct. 24 – Up to two lanes of southbound I-405 between SR 527 and Northeast 195th Street will close from 7 p.m. to 5 a.m. for electrical work.

Kirkland area

  • No lane closures scheduled at this time 

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

Last update: 11:46 a.m., 9/24
Milepost: 13.68-14.85
Mark Sawyer, project engineer, 425-225-8799
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  • No work that will affect traffic is scheduled at this time.

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

Last update: 11:29 a.m., 10/10
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: Monday, Oct. 13 to the morning of Thursday, Oct. 16 - The southbound I-405 ramp to westbound SR 520 will close nightly from 9 p.m. to 5 a.m. for permanent striping. This work is weather dependent.
  • DRIVER ALERT: Monday, Oct. 13 to the morning of Friday, Oct. 17 - The northbound I-405 ramp to westbound SR 520 will close nightly from 9 p.m. to 5 a.m. for permanent striping.