Those passenger cars look kinda short. They may be truly light rail cars that might have trouble staying on the tracks at speed.
amtrak cascade consist:
https://www.wsdot.wa.gov/Rail/TrainEquipment.htm
“We are fortunate in the Pacific Northwest to have some of the only European-style trains in the country. The train equipment, known for its comfort and performance, is manufactured by Talgo, a Spanish company that provides trains used throughout Europe.”
“Talgo trains are different from passenger trains typically used in the United States and Canada. They are articulated, which means the train cars operate as a set: adjacent cars share axles and wheels and function as a single, complete unit. This increases stability and improves safety and the smoothness of the ride. In addition, a gravity-based tilt system reduces travel times, while also assuring that passengers are comfortable and safe. “