RESEARCH - IIHS Rates Vehicle Headlights

For the first time, the Insurance Institute for Highway Safety (IIHS) has tested and rated vehicle headlights. Of the 31 mid-sized vehicles examined, only one, the Toyota Prius, received a "good" rating. All the others rated acceptable, marginal or poor in roughly the same proportion. If you've wondered about glare from oncoming vehicles or thought that you weren't seeing well driving at night, the proof may be here.

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• IIHS headlight ratings show most need improvement