Seattle drivers should prepare for major changes this summer. Starting July 18, the northbound lanes on the I-5 Ship Canal Bridge will close or be reduced as part of a big repair project by the Washington State Department of Transportation (WSDOT). The first step is a full weekend closure from July 18 to early July 21. After that, traffic will be limited to just two lanes for four weeks. WSDOT says this work is important to keep the bridge in good shape for the future.
If you're heading to downtown Seattle during the weekend closure, use exits at Edgar Martinez Drive, Dearborn, James, or Madison streets. Northbound express lanes will stay open all weekend, but they don’t have direct downtown exits—the first one is at Northeast 42nd Street. Normally, carpool-only ramps at Columbia, Cherry, and Pine streets will be open to everyone. WSDOT advises drivers to plan ahead, use transit or alternate routes, and expect delays. The main highway will reopen on July 21, but lane reductions will continue until August 15. Another full weekend closure is planned to finish the work.
Planning for this summer's construction has been a team effort. WSDOT is working with the City of Seattle, King County Metro, Sound Transit, and others to help manage traffic on one of Seattle’s busiest roads. To reduce delays, they’ve made changes like adjusting traffic signals, adding more bus-only lanes, and creating backup plans. Groups like the Downtown Seattle Association are also helping commuters and travelers during this busy time.
Looking ahead, WSDOT has plans for more lane closures on the I-5 bridge in 2026 and 2027. Each direction will be reduced to two lanes for several months. However, all lanes will stay open during the 2026 FIFA World Cup. After the event, the northbound right lanes will close until fall. In 2027, the focus will shift to the southbound lanes, with two lanes closed at a time. These plans may cause short-term delays, but are meant to keep the bridge safe and strong for the future.
