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The is closing all lanes on Interstate 5 north Tuesday evening in downtown Seattle.

It’s part of the , which started 3 years ago and is expected to wrap up some time by the end of summer.

So far crews have added a lane at Seneca Street in Seattle, added ramp meters to improve traffic flow and now electronic sign boards are going up.

This shuts down all northbound lanes on the mainline and collector-distributor between Interstate 90 (I-90) and Olive Way, with lane reductions beginning at 9 p.m. All lanes are set to close by midnight.

More transportation: Nine-day closure coming to Lower Spokane Street Bridge

Those needing to access downtown should take the Edgar Martinez Drive exit or head east on I-90 and exit at Rainier Avenue.

The express lanes will remain open for drivers heading north of downtown.

All lanes will reopen Wednesday by 4 a.m.

You can read more of Nate Connors’ stories here. Follow Nate on X, formerly known as Twitter,  and the ³ÉÈËXÕ¾ Newsradio traffic team  for more traffic updates.