NEW YORK — The fastest trains in Amtrak's fleet are getting even faster.

The first of those NextGen Acela trains, as Amtrak calls them, are scheduled to start running on the Northeast Corridor between Boston and Washington, D.C. on Thursday.

Amtrak offered a preview of the new trains a day earlier, when U.S. Transportation Secretary Sean Duffy and top railroad officials rode the inaugural train from Washington to New York City.

"They're beautiful. They're going to be faster," Duffy said at a press conference before the ride on Wednesday. "It's going to mean better revenue, but most importantly, a better experience for the travelling public."

Amtrak says the NextGen trains can reach top speeds of up to 160 miles per hour — 10 miles per hour faster than the current Acela fleet. They're a

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