The Encore and Trax twins earned "good" scores in all Institute crashworthiness tests.
The 2015 results are a major improvement for the Encore, which received structural improvements for the new model year. The 2015 model earned a "good" rating in the small overlap test. The 2013-'14 Encore rated "poor" in the test.
"In the latest test, the driver space was maintained reasonably well, with maximum intrusion of 6 inches at the door hinge pillar and instrument panel," said the Institute in a statement. "The dummy's movement was well controlled. Measures taken from the dummy indicated a low risk of injuries in a crash of this severity."
The small overlap test replicates what happens when the front corner of a vehicle collides with another vehicle or an object such as a tree or utility pole.
The rating applies to front-wheel-drive and all-wheel-drive versions of both vehicles.
The Encore and Trax are equipped with 10 standard airbags, along with a standard rearview camera, antilock brakes and electronic stability control.
Edmunds says: The 2015 Buick Encore and Chevrolet Trax are standouts in two important safety measures, something that should be reassuring to car shoppers in this popular segment.