Workers had cleared all the wrecked train cars blocking a major West Coast highway by Wednesday morning, two days after the Amtrak train derailed in Washington state while speeding onto a bridge, state transportation officials said.

It took about a day longer than hoped, but crews had carted off the biggest chunk by the afternoon: the 270,000-pound (122,470-kg) locomotive involved in the Monday morning rush-hour crash in the city of Dupont that killed three train passengers and sent about 100 people to hospitals.

The affected southbound stretch of Interstate 5, which runs from the Canadian border to Mexico, will remain closed indefinitely, the Washington State Department of Transportation has said. Workers were clearing debris and may need to make repairs to the road surface, the department said.