Drivers can expect region-wide congestion Father’s Day weekend as construction completely closes the State Route 520 floating bridge and highway and the Interstate 5 ramps to and from Mercer Street in Seattle.

“Whether you’re headed to the Mariners’ games, the Fremont Solstice Parade and Fair or celebrating Father’s Day, we’re asking drivers to plan ahead for major traffic delays on all Puget Sound highways,” said Brian Dobbins, WSDOT construction engineer for the SR 520 Eastside Transit and HOV Project.

As drivers think about alternate routes the weekend of June 17 through 20, they should expect the heaviest traffic midday Saturday and Sunday on I-5 and I-90 heading into Seattle, and on I-405 approaching I-90.

Closure details:

SR 520

Crews will close all lanes on SR 520 from 11 p.m. Friday, June 17, to 5 a.m. Monday, June 20, between Montlake Boulevard in Seattle and Interstate 405 in Bellevue. Details of the closure and detour maps are online. Night work is planned, and neighbors near the work zone are likely to hear construction noise.
All SR 520 ramps in the construction zone also will close, except for the 108th Avenue Northeast on-ramp to eastbound SR 520.
SR 520 from I-5 to Montlake Boulevard will remain open to traffic.
I-5 Mercer Street ramps

The City of Seattle is closing the I-5 on- and off-ramps at Mercer Street at 11 p.m. Friday, June 17, and reopening them at 5 a.m. Monday, June 20.

For more information, visit the WSDOT or SDOT websites.