According to a release, the all-new 36 mpg 2012 Impreza, the most fuel-efficient all-wheel drive vehicle in America, was awarded in the "Small Car" category.
"Our customers take their safety very seriously and so we are very pleased that IIHS has recognized us again with a Top Safety Pick winner for all our qualifying models," said
Officials noted that the Top Safety Pick recognizes vehicles that in testing, do the best job of protecting people in front, side, rear, and now rollover crashes based on 'good' ratings in each category.
The Institute's frontal crashworthiness evaluations are based on results of 40 mph frontal offset crash tests. Each vehicle's overall evaluation is based on measurements of intrusion into the occupant compartment, injury measures recorded on a 50th percentile male Hybrid III dummy in the driver seat, and analysis of slow-motion film to assess how well the restraint system controlled dummy movement during the test.
Side evaluations are based on performance in a crash test in which the side of a vehicle is struck by a barrier moving at 31 mph. The barrier represents the front end of a pickup or SUV. Ratings reflect injury measures recorded on 2-instrumented SID-IIs dummies representing a small (5th percentile) woman, assessment of head protection countermeasures, and the vehicle's structural performance during the impact.
Rear crash protection is rated according to a two-step procedure. Starting points for the ratings are measurements of head restraint geometry -- the height of a restraint and its horizontal distance behind the back of the head of an average size man. Seat/head restraints with good or acceptable geometry are tested dynamically using a dummy that measures forces on the neck. This test simulates a collision in which a stationary vehicle is struck in the rear at 20 mph. Seats without good or acceptable geometry are rated poor overall because they can't be positioned to protect many people.
In the roof strength test, a metal plate is pushed against 1 side of a roof at a constant speed. To earn a good rating for rollover protection, the roof must withstand a force of 4 times the vehicle's weight before reaching 5 inches of crush. This is called a strength- to-weight ratio. For an acceptable rating, the minimum required strength-to-weight ratio is 3.25. A marginal rating value is 2.5. Anything lower than that is rated poor.
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