I-405 - SB SR 900 to Coal Creek Pkwy SE - Paving Outside Lane

Project news

  • No lane closures are scheduled.
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Needs & benefits

We will repave nearly 6 miles of the right lane of southbound I-405 from Coal Creek Parkway Southeast to State Route 900 as well as a portion of the on and off-ramps along that stretch of interstate. During this project, contractor crews will also fill cracks in the center lane. All work will be completed during overnight lane closures.

Why is WSDOT repaving roughly 6 miles of the right lane of southbound I-405?
Large trucks tend to primarily drive on this right outside lane. Their weight wears down the asphalt more quickly than smaller cars and trucks, which tend to use the two left lanes in this area. The use by large trucks has sped up the development of cracks, ruts and potholes since the lane was repaved in 2006. Without new pavement, the safety of the roadway in that lane may be compromised before the I-405 Renton to Bellevue Project can realign and expand this part of I-405.

To make sure the outside lane is in good driving condition leading up to the start of that project, contractor crews will grind down and remove the top two inches of damaged pavement in the right southbound lane, then put new asphalt on top. The next lane over will have its cracks filled.

The End Result
New pavement will add structural support to the existing roadway until the I-405 improvement project begins.

Project Benefits

  • Economic: these repairs will preserve the lane and protect the supporting layers of the road beneath.
  • Safety: repaving will remove the potholes and ruts where water can collect.


  • March 2018: Advertised for competitive bidding.
  • Spring 2018: Construction scheduled to start.
  • Fall 2018: Construction scheduled to be completed.


Total estimated cost of this project is $1.7 million.


Ally Barrera
WSDOT Communications
Phone: 206-440-4457
Email: Barrera@wsdot.wa.gov

Frances Fedoriska
WSDOT Communications
Phone: 206-440-4690
Email: Fedorif@wsdot.wa.gov

Small map of project area extending from Coal Creek Parkway SE south to SR 900 on I-405.

Example of rutting and cracking we will repair during this repaving project on southbound I-405 in 2018.
This is some of the rutting and cracking we will fix during this repaving project on southbound I-405 in 2018.