Officials had expected congestion and warned motorists to expect major delays, with Canadians heading south to shop in the U.S. and Americans heading north to visit Canada over their Memorial Day weekend.
Detours have been set up, but it appears many are avoiding cross-border travel this weekend.
Three people were injured on Thursday when two cars were dumped about 16 metres into the Skagit River on Interstate 5 north of Mount Vernon.
Washington State police have said an Alberta trucker hit a steel beam on the bridge precipitating the collapse.
- UBC student took 'nose dive into water' after bridge collapse
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Meanwhile, Washington State governor Jay Inslee is reminding British Columbians that Skagit County is still open for business.
Inslee says shoppers still have full access to businesses north of the river and several bridges across the river are still intact.