The rail service’s updated cars will launch later this year and are the first phase of its plan to expand America’s train ...

A new modern Amtrak fleet of 28 high-speed trains will enter service this spring on the popular Acela line from Boston to Washington, D.C. after nearly a decade of planning and design delays.

Amtrak’s northeastern Acela, the fastest American passenger train, tops out at about 150 m.p.h. “And you come back to America, and you’re like, ‘Amtrak is a sad situation,’” Mr. Musk ...