New Amtrak Airo train arrives in Seattle before launch

One of Amtrak's new Airo trainsets — set for service to Portland later this year — arrived at Seattle's King Street Station over the weekend.

Why it matters: The trains, which will debut on the Amtrak Cascades line, can travel at speeds of up to 125 miles per hour.

• They are billed as having higher fuel-efficiency and more modern interiors, among other upgrades.

What's next: The trains are now in their final stage of testing and route training on Pacific Northwest tracks, the final step before they enter service, according to Amtrack.