Collision Blocked Northbound Lanes of I-405 Thursday Afternoon

Update:

Crews have cleared a collision that blocked northbound lanes of Interstate 405 near milepost 9 at 112th Avenue SE, causing major backups, according to the Washington Department of Transportation. The backup had been four miles long and the traffic tie-up lasted more than half an hour.

Another collision that occurred on the 112th Avenue SE northbound onramp that took place as the original collision was being cleared up has now also been cleared up, according to the DOT.

Original story:

A collision is blocking northbound lanes of Interstate 405, according to the Washington Department of Transportation. WSDOT says to avoid the area if you can. Backup is four miles, according to the DOT's Twitter feed.

A jackknifed semi that had been blocking all lanes has been straightened and cars are getting by in the left-hand lane, their feed announced.

Bellevue Patch will update this page with information about the crash as soon as it is available.

For instant updates on the traffic in the area, look at the Washington State Department of Transportation's Seattle-area traffic map here.