Amtrak's cafe cars will also get a modern upgrade with self-service options. The new trains are also more fuel efficient, producing 90 percent less particulate emissions in diesel operations.

Chiltern Railways, part of Arriva Group, has signed a ten-year rental agreement with Beacon Trains for 13 low-emission trains.

The Amtrak Airo announcement comes as the company invests billions in everything from expanded rail yards and updated train stations to the addition of observatory cars on popular routes.