Subaru placed two models atop a list of seven vehicles with collision avoidance systems that rate among the best in the industry.
The rankings follow crash tests conducted by the Insurance Institute for Highway Safety, measuring how quickly vehicles alert drivers about possible rear-end collisions and whether vehicles avoid a crash or reduce their speed by at least 5 mph.
"Front crash prevention systems can add a thousand dollars or more to the cost of a new car," said David Zuby, chief research officer at IIHS. "Our new ratings let consumers know which systems offer the most promise for the extra expense."
The most recent crash data from the Department of Transportation shows there were 1.7 million rear-end accidents in the U.S. in 2011.
Rear-end accidents accounted for 6 percent of crashes with fatalities and 31 percent of those that resulted in injuries.