An inside look at America's fastest train 03:49. Amtrak's new Acela, which is America's fastest train, is undergoing speed testing at a sprawling 30,000-acre facility outside Pueblo, Colorado.

Fast trains are more expensive to operate, including the advanced safety equipment that’s needed for the highest speed to be possible. Amtrak is also slowed because it generally shares tracks ...

New bullet train concepts are emerging around the US, while overseas countries are pushing the boundaries even further, reaching performances that we never thought were possible. For now, Amtrak ...

While 160 or even 150 mph may seem fast for Amtrak's passengers, ... The fastest trains in China can hit speeds higher than 220 mph, and European high-speed rail usually maxes out close to 200 mph.