From the article which I assume you didn't read:

"But the once groundbreaking program is now out of date and has not kept pace with safety innovations and advances, and other countries, including Japan and many in Europe, have far surpassed the U.S., motor vehicle safety experts say"

Cool, however, it seems it's more complicated than the article lets on. This article[0] shows that cars that meet US safety standards perform better in rollover situations while EU vehicles perform better in frontal collisions.

[0] https://spectrum.ieee.org/cars-that-think/transportation/saf...

We also have IIHS testing which, while unofficial, has always been at the forefront of crash testing, and is oft cited and very influential in the US.