IIHS – Rear Seat Passengers at Risk in Small Cars

Ken Zino of AutoInformed.com on IIHS - Rear Seat Passengers at Risk in Small Cars

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Most small cars don’t provide good protection for rear-seat passengers, according to the latest data from crash tests by the Insurance Institute for Highway Safety.* None of the five small cars IIHS evaluated earns a good rating, according to data released today. The Honda Civic sedan and Toyota Corolla sedan are rated acceptable. The Kia Forte, Nissan Sentra and Subaru Crosstrek are rated poor.

“These results highlight one of the key reasons that we updated our moderate overlap front crash test,” said IIHS President David Harkey. “In all the small cars we tested, the rear dummy ‘submarined’ under the seat belt, causing the lap belt to ride up onto the abdomen and increasing the risk of internal injuries.”

The updated test adds a dummy in the back seat behind the driver. The driver dummy is the size of an average adult man. The rear dummy represents a small woman or 12-year-old child. IIHS researchers also developed new metrics that focus on the injuries most frequently seen in back-seat passengers.

For a vehicle to earn a good rating, there can’t be an excessive risk of injury to the head, neck, chest, abdomen or thigh, recorded by the second-row dummy. The dummy should remain correctly positioned during the crash without sliding forward beneath the lap belt, aka submarining, and the head should remain a safe distance from the front seatback and the rest of the vehicle interior. A pressure sensor on the rear dummy’s torso is used to check whether the shoulder belt is too high, which can make the restraint system less effective.

IIHS started the updated moderate overlap front test in 2022 after research showed that in newer vehicles the risk of a fatal injury is now higher for belted occupants in the rear than for those in front. “This is not because the rear seat has become less safe. Rather, the front seat has become safer because of improved airbags and advanced seat belts that are rarely available in back. Even with these developments, the back seat remains the safest place for young children, who can be injured by an inflating front airbag,” IIHS said.

The updated test adds a dummy in the back seat behind the driver. The driver dummy is the size of an average adult man. The rear dummy represents a small woman or 12-year-old child. IIHS researchers also developed new metrics that focus on the injuries most frequently seen in back-seat passengers.

*The Insurance Institute for Highway Safety (IIHS) is an independent, nonprofit scientific and educational organization dedicated to reducing deaths, injuries and property damage from motor vehicle crashes through research and evaluation and through education of consumers, policymakers and safety professionals. It is wholly supported by auto insurers and insurance associations.

About Ken Zino

Ken Zino, publisher (kzhw@aol.com), is a versatile auto industry participant with global experience spanning decades in print and broadcast journalism, as well as social media. He has automobile testing, marketing, public relations and communications experience. He is past president of The International Motor Press Assn, the Detroit Press Club, founding member and first President of the Automotive Press Assn. He is a member of APA, IMPA and the Midwest Automotive Press Assn. Zino is at home on test tracks, knows his way around U.S. Congressional hearing rooms, auto company headquarters, plant floors, as well as industry research and development labs where the real mobility work is done. He can quote from court decisions, refer to instrumented road tests, analyze financial results, and profile executive personalities and corporate cultures. He also brings an historical perspective while citing their contemporary relevance of the work of legendary auto writers such as Ken Purdy, Jim Dunne or Jerry Flint, or writers such as Red Smith, Mark Twain, Thomas Jefferson – all to bring perspective to a chaotic automotive universe. Above all, decades after he first drove a car, Zino still revels in the sound of the exhaust as the throttle is blipped and the driver’s rush that occurs when the entry, apex and exit points of a turn are smoothly and swiftly crossed. It’s the beginning of a perfect lap. AutoInformed has an editorial philosophy that loves transportation machines of all kinds while promoting critical thinking about the future use of cars and trucks. Zino builds AutoInformed from his background in automotive journalism starting at Hearst Publishing in New York City on Motor and MotorTech Magazines and car testing where he reviewed hundreds of vehicles in his decade-long stint as the Detroit Bureau Chief of Road & Track magazine. Zino has also worked in Europe, and Asia – now the largest automotive market in the world with China at its center.
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